fix(patterns): correct non-blocking timing and blink off phase

Co-authored-by: Cursor <cursoragent@cursor.com>

src/background_tasks.py

@@ -0,0 +1,42 @@
+import asyncio
+import gc
+import utime
+
+from hello import broadcast_hello_udp
+
+
+async def presets_loop(presets, wdt):
+    last_mem_log = utime.ticks_ms()
+    while True:
+        presets.tick()
+        wdt.feed()
+        if bool(getattr(presets, "debug", False)):
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last_mem_log) >= 5000:
+                gc.collect()
+                print("mem runtime:", {"free": gc.mem_free(), "alloc": gc.mem_alloc()})
+                last_mem_log = now
+        # tick() does not await; yield so UDP hello and HTTP/WebSocket can run.
+        await asyncio.sleep(0)
+
+
+async def udp_hello_loop_after_http_ready(sta_if, settings, wdt, runtime_state):
+    """Broadcast hello at startup-fast cadence, then slower cadence."""
+    await asyncio.sleep(1)
+    started_ms = utime.ticks_ms()
+    while True:
+        if runtime_state.hello:
+            print("UDP hello: broadcasting...")
+            try:
+                broadcast_hello_udp(
+                    sta_if,
+                    settings.get("name", ""),
+                    wait_reply=False,
+                    wdt=wdt,
+                    dual_destinations=True,
+                )
+            except Exception as ex:
+                print("UDP hello broadcast failed:", ex)
+        elapsed_ms = utime.ticks_diff(utime.ticks_ms(), started_ms)
+        interval_s = 5 if elapsed_ms < 60000 else 60
+        await asyncio.sleep(interval_s)

src/binary_envelope.py

@@ -0,0 +1,209 @@
+"""Decode compact binary controller envelopes — v2 native binary, v1 legacy JSON blobs."""
+
+import json
+import struct
+
+BINARY_ENVELOPE_VERSION_1 = 1
+BINARY_ENVELOPE_VERSION_2 = 2
+HEADER_LEN = 5
+
+
+def _brightness_0_255_from_wire(wire):
+    w = max(0, min(127, int(wire)))
+    return min(255, (w * 255) // 127)
+
+
+def _decode_preset_record(buf, off):
+    nl = buf[off]
+    off += 1
+    name = buf[off : off + nl].decode("utf-8")
+    off += nl
+    pl = buf[off]
+    off += 1
+    pattern = buf[off : off + pl].decode("utf-8")
+    off += pl
+    nc = buf[off]
+    off += 1
+    colors = []
+    for _ in range(nc):
+        r, g, b = buf[off], buf[off + 1], buf[off + 2]
+        off += 3
+        colors.append("#%02x%02x%02x" % (r, g, b))
+    if off + 16 > len(buf):
+        raise ValueError("truncated")
+    delay, br, auto, n1, n2, n3, n4, n5, n6 = struct.unpack_from(
+        "<HBBhhhhhh", buf, off
+    )
+    off += 16
+    preset = {
+        "p": pattern,
+        "c": colors,
+        "d": delay,
+        "b": br,
+        "a": bool(auto),
+        "n1": n1,
+        "n2": n2,
+        "n3": n3,
+        "n4": n4,
+        "n5": n5,
+        "n6": n6,
+    }
+    return name, preset, off
+
+
+def _decode_presets_blob(chunk):
+    if not chunk:
+        return {}
+    off = 0
+    count = chunk[off]
+    off += 1
+    out = {}
+    for _ in range(count):
+        name, preset, off = _decode_preset_record(chunk, off)
+        out[name] = preset
+    if off != len(chunk):
+        raise ValueError("presets blob mismatch")
+    return out
+
+
+def _decode_select_blob(chunk):
+    if not chunk:
+        return {}
+    off = 0
+    count = chunk[off]
+    off += 1
+    out = {}
+    for _ in range(count):
+        dl = chunk[off]
+        off += 1
+        device = chunk[off : off + dl].decode("utf-8")
+        off += dl
+        pl = chunk[off]
+        off += 1
+        pname = chunk[off : off + pl].decode("utf-8")
+        off += pl
+        has_step = chunk[off]
+        off += 1
+        if has_step:
+            step = struct.unpack_from("<H", chunk, off)[0]
+            off += 2
+            out[device] = [pname, step]
+        else:
+            out[device] = [pname]
+    if off != len(chunk):
+        raise ValueError("select blob mismatch")
+    return out
+
+
+def _decode_default_blob(chunk):
+    if not chunk:
+        return "", []
+    off = 0
+    nl = chunk[off]
+    off += 1
+    default_name = chunk[off : off + nl].decode("utf-8") if nl else ""
+    off += nl
+    nt = chunk[off]
+    off += 1
+    targets = []
+    for _ in range(nt):
+        tl = chunk[off]
+        off += 1
+        targets.append(chunk[off : off + tl].decode("utf-8"))
+        off += tl
+    if off != len(chunk):
+        raise ValueError("default blob mismatch")
+    return default_name, targets
+
+
+def parse_binary_envelope_v2(buf):
+    if not isinstance(buf, (bytes, bytearray)) or len(buf) < HEADER_LEN:
+        return None
+    if buf[0] != BINARY_ENVELOPE_VERSION_2:
+        return None
+    lp = buf[2]
+    ls = buf[3]
+    ld = buf[4]
+    need = HEADER_LEN + lp + ls + ld
+    if len(buf) != need:
+        return None
+
+    off = HEADER_LEN
+    presets_chunk = buf[off : off + lp]
+    off += lp
+    select_chunk = buf[off : off + ls]
+    off += ls
+    default_chunk = buf[off : off + ld]
+
+    data = {"v": "1"}
+    br = buf[1]
+    if br < 128:
+        data["b"] = _brightness_0_255_from_wire(br)
+
+    try:
+        if lp:
+            data["presets"] = _decode_presets_blob(presets_chunk)
+        if ls:
+            data["select"] = _decode_select_blob(select_chunk)
+        if ld:
+            dname, targets = _decode_default_blob(default_chunk)
+            data["default"] = dname
+            data["targets"] = targets
+    except (ValueError, UnicodeError, TypeError, struct.error):
+        return None
+
+    return data
+
+
+def parse_binary_envelope_v1(buf):
+    if not isinstance(buf, (bytes, bytearray)) or len(buf) < HEADER_LEN:
+        return None
+    if buf[0] != BINARY_ENVELOPE_VERSION_1:
+        return None
+    lp = buf[2]
+    ls = buf[3]
+    ld = buf[4]
+    need = HEADER_LEN + lp + ls + ld
+    if len(buf) != need:
+        return None
+
+    off = HEADER_LEN
+    presets_chunk = buf[off : off + lp]
+    off += lp
+    select_chunk = buf[off : off + ls]
+    off += ls
+    default_chunk = buf[off : off + ld]
+
+    data = {"v": "1"}
+
+    br = buf[1]
+    if br < 128:
+        data["b"] = _brightness_0_255_from_wire(br)
+
+    if lp:
+        try:
+            data["presets"] = json.loads(presets_chunk.decode("utf-8"))
+        except (ValueError, UnicodeError):
+            return None
+    if ls:
+        try:
+            data["select"] = json.loads(select_chunk.decode("utf-8"))
+        except (ValueError, UnicodeError):
+            return None
+    if ld:
+        try:
+            extra = json.loads(default_chunk.decode("utf-8"))
+        except (ValueError, UnicodeError):
+            return None
+        if isinstance(extra, dict):
+            for k, v in extra.items():
+                data[k] = v
+
+    return data
+
+
+def parse_binary_envelope(buf):
+    d = parse_binary_envelope_v2(buf)
+    if d is not None:
+        return d
+    return parse_binary_envelope_v1(buf)

src/controller_messages.py

@@ -3,6 +3,7 @@
 import json
 import socket
 
+from binary_envelope import parse_binary_envelope
 from utils import convert_and_reorder_colors
 
 try:
@@ -12,14 +13,23 @@ except ImportError:
 
 
 def process_data(payload, settings, presets, controller_ip=None):
-    """Read one controller message; json.loads (bytes or str), then apply fields."""
+    """Read one controller message; binary v1 envelope or JSON v1, then apply fields."""
+    data = None
+    if isinstance(payload, (bytes, bytearray)):
+        data = parse_binary_envelope(payload)
+        if data is None:
             try:
                 data = json.loads(payload)
+            except (ValueError, TypeError):
+                return
+    else:
+        try:
+            data = json.loads(payload)
+        except (ValueError, TypeError):
+            return
     print(payload)
     if data.get("v", "") != "1":
         return
-    except (ValueError, TypeError):
-        return
     if "b" in data:
         apply_brightness(data, settings, presets)
     if "presets" in data:
@@ -36,6 +46,8 @@ def process_data(payload, settings, presets, controller_ip=None):
         presets.save()
     if "save" in data and "clear_presets" in data:
         presets.save()
+    if "save" in data and "b" in data:
+        settings.save()
 
 
 def apply_brightness(data, settings, presets):

src/http_routes.py

@@ -0,0 +1,125 @@
+import json
+
+from controller_messages import process_data
+from microdot.websocket import WebSocketError, with_websocket
+
+try:
+    import uos as os
+except ImportError:
+    import os
+
+
+def _safe_pattern_filename(name):
+    if not isinstance(name, str):
+        return False
+    if not name.endswith(".py"):
+        return False
+    if "/" in name or "\\" in name or ".." in name:
+        return False
+    return True
+
+
+def register_routes(app, settings, presets, runtime_state):
+    @app.route("/ws")
+    @with_websocket
+    async def ws_handler(request, ws):
+        print("WS client connected")
+        runtime_state.ws_connected()
+        controller_ip = None
+        try:
+            client_addr = getattr(request, "client_addr", None)
+            if isinstance(client_addr, (tuple, list)) and client_addr:
+                controller_ip = client_addr[0]
+            elif isinstance(client_addr, str):
+                controller_ip = client_addr
+        except Exception:
+            controller_ip = None
+        print("WS controller_ip:", controller_ip)
+        try:
+            while True:
+                data = await ws.receive()
+                if not data:
+                    print("WS client disconnected (closed)")
+                    break
+                print("WS recv bytes:", len(data) if isinstance(data, (bytes, bytearray)) else len(str(data)))
+                print(data)
+                process_data(data, settings, presets, controller_ip=controller_ip)
+        except WebSocketError as e:
+            print("WS client disconnected:", e)
+        except OSError as e:
+            print("WS client dropped (OSError):", e)
+        finally:
+            runtime_state.ws_disconnected()
+            print(
+                "WS client disconnected: hello=",
+                runtime_state.hello,
+                "ws_client_count=",
+                runtime_state.ws_client_count,
+            )
+
+    @app.post("/patterns/upload")
+    async def upload_pattern(request):
+        """Receive one pattern file body from led-controller and reload patterns."""
+        raw_name = request.args.get("name")
+        reload_raw = request.args.get("reload", "1")
+        reload_patterns = str(reload_raw).strip().lower() not in ("0", "false", "no", "off")
+        print("patterns/upload request:", {"name": raw_name, "reload": reload_patterns})
+
+        if not isinstance(raw_name, str) or not raw_name.strip():
+            return json.dumps({"error": "name is required"}), 400, {"Content-Type": "application/json"}
+        body = request.body
+        if not isinstance(body, (bytes, bytearray)) or not body:
+            print("patterns/upload rejected: empty body")
+            return json.dumps({"error": "code is required"}), 400, {"Content-Type": "application/json"}
+        print("patterns/upload body_bytes:", len(body))
+        try:
+            code = body.decode("utf-8")
+        except UnicodeError:
+            print("patterns/upload rejected: body not utf-8")
+            return json.dumps({"error": "body must be utf-8 text"}), 400, {"Content-Type": "application/json"}
+        if not code.strip():
+            return json.dumps({"error": "code is required"}), 400, {"Content-Type": "application/json"}
+
+        name = raw_name.strip()
+        if not name.endswith(".py"):
+            name += ".py"
+        if not _safe_pattern_filename(name) or name in ("__init__.py", "main.py"):
+            return json.dumps({"error": "invalid pattern filename"}), 400, {"Content-Type": "application/json"}
+
+        try:
+            os.mkdir("patterns")
+        except OSError:
+            pass
+
+        path = "patterns/" + name
+        try:
+            print("patterns/upload writing:", path)
+            with open(path, "w") as f:
+                f.write(code)
+            if reload_patterns:
+                print("patterns/upload reloading patterns")
+                presets.reload_patterns()
+        except OSError as e:
+            print("patterns/upload failed:", e)
+            return json.dumps({"error": str(e)}), 500, {"Content-Type": "application/json"}
+        print("patterns/upload success:", {"name": name, "reloaded": reload_patterns})
+
+        return json.dumps(
+            {
+                "message": "pattern uploaded",
+                "name": name,
+                "reloaded": reload_patterns,
+            }
+        ), 201, {"Content-Type": "application/json"}
+
+    @app.post("/presets/upload")
+    async def upload_presets(request):
+        """Receive v1 JSON with ``presets`` and apply/save on the driver."""
+        body = request.body
+        if not isinstance(body, (bytes, bytearray)) or not body:
+            return json.dumps({"error": "body is required"}), 400, {"Content-Type": "application/json"}
+        try:
+            process_data(body, settings, presets)
+        except Exception as e:
+            return json.dumps({"error": str(e)}), 400, {"Content-Type": "application/json"}
+        return json.dumps({"message": "presets applied"}), 200, {"Content-Type": "application/json"}

src/main.py

@@ -54,6 +54,7 @@ sta_if.active(True)
 sta_if.config(pm=network.WLAN.PM_NONE)
 sta_if.connect(settings["ssid"], settings["password"])
 while not sta_if.isconnected():
+    print("Connecting")
     utime.sleep(1)
     wdt.feed()
 

src/patterns/aurora.py

@@ -0,0 +1,31 @@
+import utime
+
+
+class Aurora:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(40, 200, 140), (80, 120, 255), (160, 80, 220)]
+        bands = max(1, int(preset.n1) if int(preset.n1) > 0 else 3)
+        shimmer = max(0, min(255, int(preset.n2) if int(preset.n2) > 0 else 40))
+        phase = self.driver.step % 256
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                for i in range(self.driver.num_leds):
+                    idx = ((i * bands) // max(1, self.driver.num_leds) + (phase // 32)) % len(colors)
+                    c = self.driver.apply_brightness(colors[idx], preset.b)
+                    w = (255 - abs(128 - ((i * 8 + phase) & 255)) * 2)
+                    w = max(0, min(255, w + shimmer))
+                    self.driver.n[i] = ((c[0]*w)//255, (c[1]*w)//255, (c[2]*w)//255)
+                self.driver.n.write()
+                phase = (phase + 1) & 255
+                self.driver.step = phase
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/bar_graph.py

@@ -0,0 +1,29 @@
+import utime
+
+
+class BarGraph:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(0, 255, 0), (255, 80, 0)]
+        last_update = utime.ticks_ms()
+        while True:
+            delay_ms = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last_update) >= delay_ms:
+                level = max(0, min(100, int(preset.n1) if int(preset.n1) >= 0 else 50))
+                target = (self.driver.num_leds * level) // 100
+                lit = self.driver.apply_brightness(colors[0], preset.b)
+                unlit = self.driver.apply_brightness(
+                    colors[-1],
+                    preset.b,
+                )
+                for i in range(self.driver.num_leds):
+                    self.driver.n[i] = lit if i < target else unlit
+                self.driver.n.write()
+                last_update = utime.ticks_add(last_update, delay_ms)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/blink.py

@@ -25,7 +25,7 @@ class Blink:
                     # Advance to next color for the next "on" phase
                     color_index += 1
                 else:
-                    # "Off" phase: turn all LEDs off
+                    # "Off" phase should actually be off.
                     self.driver.fill((0, 0, 0))
                 state = not state
                 last_update = utime.ticks_add(last_update, delay_ms)

src/patterns/breathing_dual.py

@@ -0,0 +1,40 @@
+import utime
+
+
+class BreathingDual:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(255, 0, 140), (0, 120, 255)]
+        phase_offset = max(0, min(255, int(preset.n1)))
+        ease = max(1, int(preset.n2) if int(preset.n2) > 0 else 1)
+        phase = self.driver.step % 256
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                p1 = phase
+                p2 = (phase + phase_offset) & 255
+                t1 = 255 - abs(128 - p1) * 2
+                t2 = 255 - abs(128 - p2) * 2
+                if ease > 1:
+                    t1 = (t1 * t1) // 255
+                    t2 = (t2 * t2) // 255
+                c1 = self.driver.apply_brightness(colors[0], preset.b)
+                c2 = self.driver.apply_brightness(colors[1 % len(colors)] if len(colors) > 1 else colors[0], preset.b)
+                half = self.driver.num_leds // 2
+                for i in range(self.driver.num_leds):
+                    if i < half:
+                        self.driver.n[i] = ((c1[0]*t1)//255, (c1[1]*t1)//255, (c1[2]*t1)//255)
+                    else:
+                        self.driver.n[i] = ((c2[0]*t2)//255, (c2[1]*t2)//255, (c2[2]*t2)//255)
+                self.driver.n.write()
+                phase = (phase + 2) & 255
+                self.driver.step = phase
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/chase.py

@@ -26,6 +26,7 @@ class Chase:
 
         color0 = self.driver.apply_brightness(color0, preset.b)
         color1 = self.driver.apply_brightness(color1, preset.b)
+        bg_color = self.driver.apply_brightness(colors[-1], preset.b)
 
         n1 = max(1, int(preset.n1))  # LEDs of color 0
         n2 = max(1, int(preset.n2))  # LEDs of color 1
@@ -53,7 +54,7 @@ class Chase:
         # If auto is False, run a single step and then stop
         if not preset.a:
             # Clear all LEDs
-            self.driver.n.fill((0, 0, 0))
+            self.driver.n.fill(bg_color)
 
             # Draw repeating pattern starting at position
             for i in range(self.driver.num_leds):
@@ -98,7 +99,7 @@ class Chase:
                     position += max_pos
 
                 # Clear all LEDs
-                self.driver.n.fill((0, 0, 0))
+                self.driver.n.fill(bg_color)
 
                 # Draw repeating pattern starting at position
                 for i in range(self.driver.num_leds):

src/patterns/circle.py

@@ -31,10 +31,10 @@ class Circle:
             base0 = base1 = (255, 255, 255)
         elif len(colors) == 1:
             base0 = colors[0]
-            base1 = (0, 0, 0)
+            base1 = colors[-1]
         else:
             base0 = colors[0]
-            base1 = colors[1]
+            base1 = colors[-1]
 
         color0 = self.driver.apply_brightness(base0, preset.b)
         color1 = self.driver.apply_brightness(base1, preset.b)
@@ -46,7 +46,7 @@ class Circle:
             if phase == "off":
                 self.driver.n.fill(color1)
             else:
-                self.driver.n.fill((0, 0, 0))
+                self.driver.n.fill(color1)
 
             # Calculate segment length
             segment_length = (head - tail) % self.driver.num_leds

src/patterns/clock_sweep.py

@@ -0,0 +1,33 @@
+import utime
+
+
+class ClockSweep:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(255, 255, 255), (60, 60, 60)]
+        width = max(1, int(preset.n1) if int(preset.n1) > 0 else 1)
+        marker = max(0, int(preset.n2) if int(preset.n2) > 0 else 0)
+        pos = self.driver.step % max(1, self.driver.num_leds)
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                bg = self.driver.apply_brightness(colors[-1], preset.b)
+                fg = self.driver.apply_brightness(colors[0], preset.b)
+                for i in range(self.driver.num_leds):
+                    self.driver.n[i] = bg
+                    if marker > 0 and i % marker == 0:
+                        self.driver.n[i] = ((bg[0]*2)//3, (bg[1]*2)//3, (bg[2]*2)//3)
+                for w in range(width):
+                    self.driver.n[(pos + w) % self.driver.num_leds] = fg
+                self.driver.n.write()
+                pos = (pos + 1) % max(1, self.driver.num_leds)
+                self.driver.step = pos
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/comet_dual.py

@@ -0,0 +1,44 @@
+import utime
+
+
+class CometDual:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(255, 255, 255)]
+        tail = max(1, int(preset.n1) if int(preset.n1) > 0 else 6)
+        speed = max(1, int(preset.n2) if int(preset.n2) > 0 else 1)
+        gap = max(0, int(preset.n3))
+        p1 = 0
+        p2 = self.driver.num_leds - 1 - gap
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                bg_color = self.driver.apply_brightness(colors[-1], preset.b)
+                for i in range(self.driver.num_leds):
+                    self.driver.n[i] = bg_color
+                c1 = self.driver.apply_brightness(colors[0 % len(colors)], preset.b)
+                c2 = self.driver.apply_brightness(colors[1 % len(colors)] if len(colors) > 1 else colors[0], preset.b)
+                for t in range(tail):
+                    i1 = p1 - t
+                    if 0 <= i1 < self.driver.num_leds:
+                        s = (255 * (tail - t)) // max(1, tail)
+                        self.driver.n[i1] = ((c1[0]*s)//255, (c1[1]*s)//255, (c1[2]*s)//255)
+                    i2 = p2 + t
+                    if 0 <= i2 < self.driver.num_leds:
+                        s = (255 * (tail - t)) // max(1, tail)
+                        self.driver.n[i2] = ((c2[0]*s)//255, (c2[1]*s)//255, (c2[2]*s)//255)
+                self.driver.n.write()
+                p1 += speed
+                p2 -= speed
+                if p1 - tail > self.driver.num_leds and p2 + tail < 0:
+                    p1 = 0
+                    p2 = self.driver.num_leds - 1 - gap
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/fireflies.py

@@ -0,0 +1,35 @@
+import random
+import utime
+
+
+class Fireflies:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(255, 210, 80), (120, 255, 120)]
+        count = max(1, int(preset.n1) if int(preset.n1) > 0 else 6)
+        speed = max(1, int(preset.n2) if int(preset.n2) > 0 else 8)
+        bugs = [[random.randint(0, max(0, self.driver.num_leds - 1)), random.randint(0, 255)] for _ in range(count)]
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                bg_color = self.driver.apply_brightness(colors[-1], preset.b)
+                for i in range(self.driver.num_leds):
+                    self.driver.n[i] = bg_color
+                for b in bugs:
+                    idx, ph = b
+                    tri = 255 - abs(128 - ph) * 2
+                    c = self.driver.apply_brightness(colors[idx % len(colors)], preset.b)
+                    self.driver.n[idx] = ((c[0]*tri)//255, (c[1]*tri)//255, (c[2]*tri)//255)
+                    b[1] = (ph + speed) & 255
+                    if random.randint(0, 31) == 0:
+                        b[0] = random.randint(0, max(0, self.driver.num_leds - 1))
+                self.driver.n.write()
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/gradient_scroll.py

@@ -0,0 +1,57 @@
+import utime
+
+
+class GradientScroll:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def _render(self, colors, phase, brightness):
+        num_leds = self.driver.num_leds
+        color_count = len(colors)
+        if num_leds <= 0 or color_count <= 0:
+            return
+        if color_count == 1:
+            self.driver.fill(self.driver.apply_brightness(colors[0], brightness))
+            return
+
+        full_span = color_count * 256
+        phase_shift = (phase * full_span) // 256
+        for i in range(num_leds):
+            pos = ((i * full_span) // num_leds + phase_shift) % full_span
+            idx = pos // 256
+            frac = pos & 255
+
+            c1 = colors[idx]
+            c2 = colors[(idx + 1) % color_count]
+            blended = (
+                c1[0] + ((c2[0] - c1[0]) * frac) // 256,
+                c1[1] + ((c2[1] - c1[1]) * frac) // 256,
+                c1[2] + ((c2[2] - c1[2]) * frac) // 256,
+            )
+            self.driver.n[i] = self.driver.apply_brightness(blended, brightness)
+        self.driver.n.write()
+
+    def run(self, preset):
+        """Scrolling blended gradient.
+
+        n1: phase step amount (default 1)
+        """
+        colors = preset.c if preset.c else [(255, 0, 0), (0, 0, 255)]
+        phase = self.driver.step % 256
+        step_amount = max(1, int(preset.n1) if int(preset.n1) > 0 else 1)
+        last_update = utime.ticks_ms()
+
+        while True:
+            delay_ms = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last_update) >= delay_ms:
+                self._render(colors, phase, preset.b)
+                phase = (phase + step_amount) % 256
+                self.driver.step = phase
+                last_update = utime.ticks_add(last_update, delay_ms)
+
+                if not preset.a:
+                    yield
+                    return
+
+            yield

src/patterns/heartbeat.py

@@ -0,0 +1,36 @@
+import utime
+
+
+class Heartbeat:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(255, 0, 40)]
+        phase = 0
+        phase_start = utime.ticks_ms()
+        did_manual_pulse = False
+        while True:
+            p1 = max(20, int(preset.n1) if int(preset.n1) > 0 else 120)
+            p2 = max(20, int(preset.n2) if int(preset.n2) > 0 else 80)
+            pause = max(20, int(preset.n3) if int(preset.n3) > 0 else 500)
+            beat_gap = max(20, int(preset.d))
+            colors = preset.c if preset.c else [(255, 0, 40)]
+            lit_color = self.driver.apply_brightness(colors[0], preset.b)
+            bg_color = self.driver.apply_brightness(colors[-1], preset.b)
+            phase_durations = (p1, beat_gap, p2, pause)
+            phase_colors = (lit_color, bg_color, lit_color, bg_color)
+
+            now = utime.ticks_ms()
+            while utime.ticks_diff(now, phase_start) >= phase_durations[phase]:
+                phase_start = utime.ticks_add(phase_start, phase_durations[phase])
+                phase = (phase + 1) % 4
+
+            self.driver.fill(phase_colors[phase])
+            yield
+            if not preset.a:
+                if did_manual_pulse or phase == 0:
+                    self.driver.fill(bg_color)
+                    yield
+                    return
+                did_manual_pulse = True

src/patterns/marquee.py

@@ -0,0 +1,31 @@
+import utime
+
+
+class Marquee:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(255, 255, 255)]
+        on_len = max(1, int(preset.n1) if int(preset.n1) > 0 else 3)
+        off_len = max(1, int(preset.n2) if int(preset.n2) > 0 else 2)
+        step = max(1, int(preset.n3) if int(preset.n3) > 0 else 1)
+        phase = self.driver.step % (on_len + off_len)
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                c = self.driver.apply_brightness(colors[0], preset.b)
+                bg_color = self.driver.apply_brightness(colors[-1], preset.b)
+                for i in range(self.driver.num_leds):
+                    m = (i + phase) % (on_len + off_len)
+                    self.driver.n[i] = c if m < on_len else bg_color
+                self.driver.n.write()
+                phase = (phase + step) % (on_len + off_len)
+                self.driver.step = phase
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/meteor_rain.py

@@ -0,0 +1,62 @@
+import utime
+
+
+class MeteorRain:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def _fade(self, color, fade_amount):
+        return (
+            (color[0] * fade_amount) // 255,
+            (color[1] * fade_amount) // 255,
+            (color[2] * fade_amount) // 255,
+        )
+
+    def run(self, preset):
+        """Single meteor with a fading tail.
+
+        n1: tail length (default 8)
+        n2: speed in LEDs per frame (default 1)
+        n3: fade amount per frame, 1..255 (default 192)
+        """
+        colors = preset.c if preset.c else [(255, 255, 255)]
+        color_index = 0
+        head = 0
+        direction = 1
+        last_update = utime.ticks_ms()
+
+        while True:
+            delay_ms = max(1, int(preset.d))
+            tail_len = max(1, int(preset.n1) if int(preset.n1) > 0 else 8)
+            speed = max(1, int(preset.n2) if int(preset.n2) > 0 else 1)
+            fade_amount = int(preset.n3) if int(preset.n3) > 0 else 192
+            fade_amount = max(1, min(255, fade_amount))
+
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last_update) >= delay_ms:
+                for i in range(self.driver.num_leds):
+                    self.driver.n[i] = self._fade(self.driver.n[i], fade_amount)
+
+                base = colors[color_index % len(colors)]
+                lit = self.driver.apply_brightness(base, preset.b)
+                if 0 <= head < self.driver.num_leds:
+                    self.driver.n[head] = lit
+                self.driver.n.write()
+
+                head += direction * speed
+                if head >= self.driver.num_leds + tail_len:
+                    head = self.driver.num_leds - 1
+                    direction = -1
+                    color_index += 1
+                elif head < -tail_len:
+                    head = 0
+                    direction = 1
+                    color_index += 1
+
+                last_update = utime.ticks_add(last_update, delay_ms)
+
+                if not preset.a:
+                    yield
+                    return
+
+            yield

src/patterns/orbit.py

@@ -0,0 +1,31 @@
+import utime
+
+
+class Orbit:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(255, 255, 255), (0, 180, 255), (255, 0, 120)]
+        orbits = max(1, int(preset.n1) if int(preset.n1) > 0 else 3)
+        speed = max(1, int(preset.n2) if int(preset.n2) > 0 else 1)
+        phase = self.driver.step % 256
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                bg_color = self.driver.apply_brightness(colors[-1], preset.b)
+                for i in range(self.driver.num_leds):
+                    self.driver.n[i] = bg_color
+                for k in range(orbits):
+                    idx = ((phase * (k + 1)) // 8 + (k * self.driver.num_leds // max(1, orbits))) % max(1, self.driver.num_leds)
+                    self.driver.n[idx] = self.driver.apply_brightness(colors[k % len(colors)], preset.b)
+                self.driver.n.write()
+                phase = (phase + speed) & 255
+                self.driver.step = phase
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/palette_morph.py

@@ -0,0 +1,81 @@
+import utime
+
+
+class PaletteMorph:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def _blend(self, c1, c2, t):
+        return (
+            c1[0] + ((c2[0] - c1[0]) * t) // 255,
+            c1[1] + ((c2[1] - c1[1]) * t) // 255,
+            c1[2] + ((c2[2] - c1[2]) * t) // 255,
+        )
+
+    def run(self, preset):
+        """Living color field (non-scrolling palette warp).
+
+        Different from `colour_cycle`: this does not scroll a fixed gradient.
+        Instead, each LED breathes/warps through the palette with local phase
+        offsets so the strip looks alive.
+
+        n1: morph duration (ms)
+        n2: warp rate
+        n3: spatial turbulence amount
+        """
+        colors = preset.c if preset.c else [(255, 0, 0), (0, 255, 0), (0, 0, 255)]
+        if len(colors) < 2:
+            while True:
+                self.driver.fill(self.driver.apply_brightness(colors[0], preset.b))
+                yield
+        morph = max(50, int(preset.n1) if int(preset.n1) > 0 else 1200)
+        warp_rate = max(1, int(preset.n2) if int(preset.n2) > 0 else 3)
+        turbulence = max(1, int(preset.n3) if int(preset.n3) > 0 else 24)
+        base_idx = 0
+        start = utime.ticks_ms()
+        phase = self.driver.step % 256
+        last_update = start
+
+        while True:
+            now = utime.ticks_ms()
+            delay_ms = max(1, int(preset.d))
+            if utime.ticks_diff(now, last_update) < delay_ms:
+                yield
+                continue
+            last_update = utime.ticks_add(last_update, delay_ms)
+            age = utime.ticks_diff(now, start)
+            if age < morph:
+                t = (age * 255) // morph
+            else:
+                t = 255
+
+            # Global morph anchor between neighboring palette colors.
+            a = colors[base_idx % len(colors)]
+            b = colors[(base_idx + 1) % len(colors)]
+            anchor = self._blend(a, b, t)
+
+            for i in range(self.driver.num_leds):
+                # Non-linear local warp per LED to create "living" motion.
+                pos = (i * 256) // max(1, self.driver.num_leds)
+                wobble = ((pos * turbulence) // 32 + phase + (t // 2)) & 255
+                breath = 255 - abs(128 - wobble) * 2
+                local = (pos + (breath // 3) + (t // 4)) % 256
+                idx = (base_idx + ((local * len(colors)) // 256)) % len(colors)
+                frac = (local * len(colors)) & 255
+                c1 = colors[idx]
+                c2 = colors[(idx + 1) % len(colors)]
+                grad = self._blend(c1, c2, frac)
+                # Blend with anchor to keep coherent palette morphing.
+                out = self._blend(grad, anchor, 80)
+                self.driver.n[i] = self.driver.apply_brightness(out, preset.b)
+            self.driver.n.write()
+
+            if age >= morph:
+                base_idx = (base_idx + 1) % len(colors)
+                start = now
+                if not preset.a:
+                    yield
+                    return
+            phase = (phase + warp_rate) & 255
+            self.driver.step = phase
+            yield

src/patterns/plasma.py

@@ -0,0 +1,39 @@
+import utime
+
+
+class Plasma:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def _wheel(self, pos):
+        if pos < 85:
+            return (pos * 3, 255 - pos * 3, 0)
+        if pos < 170:
+            pos -= 85
+            return (255 - pos * 3, 0, pos * 3)
+        pos -= 170
+        return (0, pos * 3, 255 - pos * 3)
+
+    def run(self, preset):
+        scale = max(1, int(preset.n1) if int(preset.n1) > 0 else 6)
+        speed = max(1, int(preset.n2) if int(preset.n2) > 0 else 2)
+        contrast = max(1, int(preset.n3) if int(preset.n3) > 0 else 2)
+        t = self.driver.step % 256
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                for i in range(self.driver.num_leds):
+                    v = ((i * scale + t) & 255)
+                    v2 = (((i * scale // max(1, contrast)) - (t * 2)) & 255)
+                    c = self._wheel((v + v2) & 255)
+                    self.driver.n[i] = self.driver.apply_brightness(c, preset.b)
+                self.driver.n.write()
+                t = (t + speed) % 256
+                self.driver.step = t
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/pulse.py

@@ -18,6 +18,7 @@ class Pulse:
 
         # State machine based pulse using a single generator loop
         while True:
+            bg_color = self.driver.apply_brightness(colors[-1], preset.b)
             # Read current timing parameters from preset
             attack_ms = max(0, int(preset.n1))  # Attack time in ms
             hold_ms = max(0, int(preset.n2))    # Hold time in ms
@@ -49,7 +50,7 @@ class Pulse:
                 self.driver.fill(self.driver.apply_brightness(color, preset.b))
             elif elapsed < total_ms:
                 # Delay phase: LEDs off between pulses
-                self.driver.fill((0, 0, 0))
+                self.driver.fill(bg_color)
             else:
                 # End of cycle, move to next color and restart timing
                 color_index += 1

src/patterns/radiate.py

@@ -17,7 +17,7 @@ class Radiate:
         """
         colors = preset.c if preset.c else [(255, 255, 255)]
         base_on = colors[0]
-        base_off = colors[1] if len(colors) > 1 else (0, 0, 0)
+        base_off = colors[-1]
 
         spacing = max(1, int(preset.n1))
         outward_ms = max(1, int(preset.n2))

src/patterns/rain_drops.py

@@ -0,0 +1,41 @@
+import random
+import utime
+
+
+class RainDrops:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(120, 180, 255)]
+        rate = max(1, int(preset.n1) if int(preset.n1) > 0 else 32)
+        width = max(1, int(preset.n2) if int(preset.n2) > 0 else 3)
+        drops = []
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                bg_color = self.driver.apply_brightness(colors[-1], preset.b)
+                for i in range(self.driver.num_leds):
+                    self.driver.n[i] = bg_color
+                if random.randint(0, 255) < rate:
+                    drops.append([random.randint(0, max(0, self.driver.num_leds - 1)), 0])
+                nd = []
+                for pos, age in drops:
+                    for off in range(-width, width + 1):
+                        idx = pos + off
+                        if 0 <= idx < self.driver.num_leds:
+                            s = 255 - min(255, abs(off) * 255 // max(1, width + 1) + age * 40)
+                            base = self.driver.apply_brightness(colors[age % len(colors)], preset.b)
+                            self.driver.n[idx] = ((base[0]*s)//255, (base[1]*s)//255, (base[2]*s)//255)
+                    age += 1
+                    if age < 8:
+                        nd.append([pos, age])
+                drops = nd
+                self.driver.n.write()
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/scanner.py

@@ -0,0 +1,67 @@
+import utime
+
+
+class Scanner:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        """Classic scanner eye with soft falloff.
+
+        n1: eye width (default 4)
+        n2: end pause in frames (default 0)
+        """
+        colors = preset.c if preset.c else [(255, 0, 0)]
+        color_index = 0
+        center = 0
+        direction = 1
+        pause_frames = 0
+        last_update = utime.ticks_ms()
+
+        while True:
+            delay_ms = max(1, int(preset.d))
+            width = max(1, int(preset.n1) if int(preset.n1) > 0 else 4)
+            end_pause = max(0, int(preset.n2))
+
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last_update) >= delay_ms:
+                base = colors[color_index % len(colors)]
+                base = self.driver.apply_brightness(base, preset.b)
+                bg_color = self.driver.apply_brightness(colors[-1], preset.b)
+                for i in range(self.driver.num_leds):
+                    dist = i - center
+                    if dist < 0:
+                        dist = -dist
+                    if dist > width:
+                        self.driver.n[i] = bg_color
+                    else:
+                        scale = ((width - dist) * 255) // max(1, width)
+                        self.driver.n[i] = (
+                            (base[0] * scale) // 255,
+                            (base[1] * scale) // 255,
+                            (base[2] * scale) // 255,
+                        )
+                self.driver.n.write()
+
+                if pause_frames > 0:
+                    pause_frames -= 1
+                else:
+                    center += direction
+                    if center >= self.driver.num_leds - 1:
+                        center = self.driver.num_leds - 1
+                        direction = -1
+                        pause_frames = end_pause
+                        color_index += 1
+                    elif center <= 0:
+                        center = 0
+                        direction = 1
+                        pause_frames = end_pause
+                        color_index += 1
+
+                last_update = utime.ticks_add(last_update, delay_ms)
+
+                if not preset.a:
+                    yield
+                    return
+
+            yield

src/patterns/segment_chase.py

@@ -0,0 +1,45 @@
+import utime
+
+
+class SegmentChase:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        """Independent moving segments (distinct from classic two-color chase).
+
+        n1: segment size (LEDs per segment)
+        n2: step size (phase increment each frame)
+        n3: per-segment phase offset
+        n4: gap spacing inside segment (0 = solid segment)
+        """
+        colors = preset.c if preset.c else [(255, 0, 0), (0, 0, 255)]
+        seg = max(1, int(preset.n1) if int(preset.n1) > 0 else 4)
+        phase_step = max(1, int(preset.n2) if int(preset.n2) > 0 else 1)
+        seg_offset = max(0, int(preset.n3))
+        gap = max(0, int(preset.n4))
+        phase = self.driver.step % 256
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                bg_color = self.driver.apply_brightness(colors[-1], preset.b)
+                for i in range(self.driver.num_leds):
+                    seg_idx = i // seg
+                    in_seg = i % seg
+                    local_phase = (phase + seg_idx * seg_offset) % seg
+                    lit_idx = (in_seg + local_phase) % seg
+                    if gap > 0 and lit_idx >= max(1, seg - gap):
+                        self.driver.n[i] = bg_color
+                    else:
+                        color_idx = seg_idx % len(colors)
+                        self.driver.n[i] = self.driver.apply_brightness(colors[color_idx], preset.b)
+                self.driver.n.write()
+                phase = (phase + phase_step) % seg
+                self.driver.step = phase
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/snowfall.py

@@ -0,0 +1,37 @@
+import random
+import utime
+
+
+class Snowfall:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(255, 255, 255), (180, 220, 255)]
+        density = max(1, int(preset.n1) if int(preset.n1) > 0 else 20)
+        speed = max(1, int(preset.n2) if int(preset.n2) > 0 else 1)
+        flakes = []
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                bg_color = self.driver.apply_brightness(colors[-1], preset.b)
+                if random.randint(0, 255) < density:
+                    flakes.append([self.driver.num_leds - 1, random.randint(0, len(colors)-1)])
+                for i in range(self.driver.num_leds):
+                    self.driver.n[i] = bg_color
+                nf = []
+                for pos, ci in flakes:
+                    if 0 <= pos < self.driver.num_leds:
+                        self.driver.n[pos] = self.driver.apply_brightness(colors[ci], preset.b)
+                    pos -= speed
+                    if pos >= -1:
+                        nf.append([pos, ci])
+                flakes = nf
+                self.driver.n.write()
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/sparkle_trail.py

@@ -0,0 +1,31 @@
+import random
+import utime
+
+
+class SparkleTrail:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(120, 120, 255)]
+        density = max(1, int(preset.n1) if int(preset.n1) > 0 else 24)
+        decay = max(1, min(255, int(preset.n2) if int(preset.n2) > 0 else 210))
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                for i in range(self.driver.num_leds):
+                    r,g,b = self.driver.n[i]
+                    self.driver.n[i] = ((r*decay)//255, (g*decay)//255, (b*decay)//255)
+                sparks = max(1, self.driver.num_leds * density // 255)
+                for _ in range(sparks):
+                    idx = random.randint(0, max(0, self.driver.num_leds - 1))
+                    c = self.driver.apply_brightness(colors[random.randint(0, len(colors)-1)], preset.b)
+                    self.driver.n[idx] = c
+                self.driver.n.write()
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/patterns/strobe_burst.py

@@ -0,0 +1,45 @@
+import utime
+
+
+class StrobeBurst:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(255, 255, 255)]
+        state = "flash_on"
+        flash_idx = 0
+        state_start = utime.ticks_ms()
+        while True:
+            count = max(1, int(preset.n1) if int(preset.n1) > 0 else 3)
+            gap = max(1, int(preset.n2) if int(preset.n2) > 0 else 60)
+            cooldown = max(1, int(preset.n3) if int(preset.n3) > 0 else 400)
+            on_ms = max(1, int(preset.d) // 2)
+            c = self.driver.apply_brightness(colors[0], preset.b)
+            bg_color = self.driver.apply_brightness(colors[-1], preset.b)
+            now = utime.ticks_ms()
+
+            if state == "flash_on":
+                self.driver.fill(c)
+                if utime.ticks_diff(now, state_start) >= on_ms:
+                    state = "flash_off"
+                    state_start = utime.ticks_add(state_start, on_ms)
+            elif state == "flash_off":
+                self.driver.fill(bg_color)
+                if utime.ticks_diff(now, state_start) >= gap:
+                    flash_idx += 1
+                    if flash_idx >= count:
+                        if not preset.a:
+                            return
+                        state = "cooldown"
+                        flash_idx = 0
+                        state_start = utime.ticks_add(state_start, gap)
+                    else:
+                        state = "flash_on"
+                        state_start = utime.ticks_add(state_start, gap)
+            else:
+                self.driver.fill(bg_color)
+                if utime.ticks_diff(now, state_start) >= cooldown:
+                    state = "flash_on"
+                    state_start = utime.ticks_add(state_start, cooldown)
+            yield

src/patterns/twinkle.py

@@ -39,6 +39,7 @@ class Twinkle:
         """Twinkle: n1 activity, n2 density; n3/n4 min/max length of adjacent on/off runs."""
         palette = self._palette(preset)
         num = self.driver.num_leds
+        bg_color = self.driver.apply_brightness(palette[-1], preset.b)
         if num <= 0:
             while True:
                 yield
@@ -125,7 +126,7 @@ class Twinkle:
                     base = palette[colour_i[i] % len(palette)]
                     self.driver.n[i] = self.driver.apply_brightness(base, preset.b)
                 else:
-                    self.driver.n[i] = (0, 0, 0)
+                    self.driver.n[i] = bg_color
             self.driver.n.write()
             yield
             return
@@ -185,7 +186,7 @@ class Twinkle:
                         base = palette[next_ci[i] % len(palette)]
                         self.driver.n[i] = self.driver.apply_brightness(base, preset.b)
                     else:
-                        self.driver.n[i] = (0, 0, 0)
+                        self.driver.n[i] = bg_color
                 self.driver.n.write()
                 on = next_on
                 colour_i = next_ci

src/patterns/wave.py

@@ -0,0 +1,32 @@
+import utime
+
+
+class Wave:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        colors = preset.c if preset.c else [(0, 180, 255)]
+        wavelength = max(2, int(preset.n1) if int(preset.n1) > 0 else 12)
+        amp = max(0, min(255, int(preset.n2) if int(preset.n2) > 0 else 180))
+        drift = max(1, int(preset.n3) if int(preset.n3) > 0 else 1)
+        phase = self.driver.step % 256
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                base = self.driver.apply_brightness(colors[0], preset.b)
+                for i in range(self.driver.num_leds):
+                    x = (i * 256 // wavelength + phase) & 255
+                    tri = 255 - abs(128 - x) * 2
+                    s = (tri * amp) // 255
+                    self.driver.n[i] = ((base[0]*s)//255, (base[1]*s)//255, (base[2]*s)//255)
+                self.driver.n.write()
+                phase = (phase + drift) % 256
+                self.driver.step = phase
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield

src/runtime_state.py

@@ -0,0 +1,12 @@
+class RuntimeState:
+    def __init__(self):
+        self.hello = True
+        self.ws_client_count = 0
+
+    def ws_connected(self):
+        self.ws_client_count += 1
+        self.hello = False
+
+    def ws_disconnected(self):
+        self.ws_client_count = max(0, self.ws_client_count - 1)
+        self.hello = self.ws_client_count == 0

src/startup.py

@@ -0,0 +1,53 @@
+import gc
+import machine
+import network
+import utime
+
+from presets import Presets
+from settings import Settings
+
+
+def initialize_runtime():
+    machine.freq(160000000)
+
+    settings = Settings()
+    print(settings)
+
+    wdt = machine.WDT(timeout=10000)
+    wdt.feed()
+
+    gc.collect()
+    print("mem before presets:", {"free": gc.mem_free(), "alloc": gc.mem_alloc()})
+
+    presets = Presets(settings["led_pin"], settings["num_leds"])
+    presets.load(settings)
+    presets.b = settings.get("brightness", 255)
+    presets.debug = bool(settings.get("debug", False))
+    gc.collect()
+    print("mem after presets:", {"free": gc.mem_free(), "alloc": gc.mem_alloc()})
+
+    default_preset = settings.get("default", "")
+    if default_preset and default_preset in presets.presets:
+        if presets.select(default_preset):
+            print("Selected startup preset:", default_preset)
+        else:
+            print("Startup preset failed (invalid pattern?):", default_preset)
+
+    # On ESP32-C3, soft reboots can leave Wi-Fi driver state allocated.
+    # Reset both interfaces and collect before bringing STA up.
+    ap_if = network.WLAN(network.AP_IF)
+    ap_if.active(False)
+    sta_if = network.WLAN(network.STA_IF)
+    if sta_if.active():
+        sta_if.active(False)
+    utime.sleep_ms(100)
+    gc.collect()
+    sta_if.active(True)
+    sta_if.config(pm=network.WLAN.PM_NONE)
+    sta_if.connect(settings["ssid"], settings["password"])
+    while not sta_if.isconnected():
+        utime.sleep(1)
+        wdt.feed()
+
+    print(sta_if.ifconfig())
+    return settings, presets, wdt, sta_if

tests/all.py

@@ -184,6 +184,36 @@ def test_pattern_smoke():
         ctx.tick_for_ms(120)
 
 
+def test_patterns_do_not_use_blocking_sleep():
+    pattern_dir = "patterns"
+    offenders = []
+    try:
+        files = os.listdir(pattern_dir)
+    except OSError:
+        raise AssertionError("patterns directory is missing")
+
+    for filename in files:
+        if not filename.endswith(".py") or filename in ("__init__.py", "main.py"):
+            continue
+        path = pattern_dir + "/" + filename
+        try:
+            with open(path, "r") as f:
+                src = f.read()
+        except OSError:
+            offenders.append(filename + " (unreadable)")
+            continue
+
+        if (
+            "utime.sleep(" in src
+            or "utime.sleep_ms(" in src
+            or "time.sleep(" in src
+            or "time.sleep_ms(" in src
+        ):
+            offenders.append(filename)
+
+    assert not offenders, "blocking sleep found in patterns: %s" % ", ".join(offenders)
+
+
 def test_default_requires_existing_preset():
     ctx = _TestContext()
     _process_message(ctx, {"v": "1", "default": "missing"})
@@ -242,6 +272,7 @@ def run_all():
         test_preset_edit_sanitization,
         test_colour_conversion_and_transition,
         test_pattern_smoke,
+        test_patterns_do_not_use_blocking_sleep,
         test_default_requires_existing_preset,
         test_default_targets_gate_by_device_name,
         test_save_and_load_roundtrip,

tests/patterns/aurora.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_aurora", {
+        "p": "aurora",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_aurora")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/bar_graph.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_bar_graph", {
+        "p": "bar_graph",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_bar_graph")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/breathing_dual.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_breathing_dual", {
+        "p": "breathing_dual",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_breathing_dual")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/clock_sweep.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_clock_sweep", {
+        "p": "clock_sweep",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_clock_sweep")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/comet_dual.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_comet_dual", {
+        "p": "comet_dual",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_comet_dual")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/fireflies.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_fireflies", {
+        "p": "fireflies",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_fireflies")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/gradient_scroll.py

@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    print("Test gradient_scroll")
+    p.edit("gradient_test", {
+        "p": "gradient_scroll",
+        "b": 220,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 255, 0), (0, 0, 255)],
+        "n1": 2,
+        "a": True,
+    })
+    p.select("gradient_test")
+    run_for(p, wdt, 4000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/heartbeat.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_heartbeat", {
+        "p": "heartbeat",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_heartbeat")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/marquee.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_marquee", {
+        "p": "marquee",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_marquee")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/meteor_rain.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    print("Test meteor_rain")
+    p.edit("meteor_test", {
+        "p": "meteor_rain",
+        "b": 200,
+        "d": 40,
+        "c": [(255, 80, 0), (0, 120, 255)],
+        "n1": 10,
+        "n2": 1,
+        "n3": 200,
+        "a": True,
+    })
+    p.select("meteor_test")
+    run_for(p, wdt, 4000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/orbit.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_orbit", {
+        "p": "orbit",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_orbit")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/palette_morph.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_palette_morph", {
+        "p": "palette_morph",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_palette_morph")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/plasma.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_plasma", {
+        "p": "plasma",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_plasma")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/rain_drops.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_rain_drops", {
+        "p": "rain_drops",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_rain_drops")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/scanner.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    print("Test scanner")
+    p.edit("scanner_test", {
+        "p": "scanner",
+        "b": 255,
+        "d": 30,
+        "c": [(255, 0, 0)],
+        "n1": 4,
+        "n2": 2,
+        "a": True,
+    })
+    p.select("scanner_test")
+    run_for(p, wdt, 4000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/segment_chase.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_segment_chase", {
+        "p": "segment_chase",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_segment_chase")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/snowfall.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_snowfall", {
+        "p": "snowfall",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_snowfall")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/sparkle_trail.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_sparkle_trail", {
+        "p": "sparkle_trail",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_sparkle_trail")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/strobe_burst.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_strobe_burst", {
+        "p": "strobe_burst",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_strobe_burst")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()

tests/patterns/wave.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets, run_tick
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        run_tick(p)
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 30))
+    wdt = WDT(timeout=10000)
+
+    p.edit("test_wave", {
+        "p": "wave",
+        "b": 200,
+        "d": 60,
+        "c": [(255, 0, 0), (0, 0, 255), (0, 255, 0)],
+        "n1": 4,
+        "n2": 2,
+        "n3": 120,
+        "a": True,
+    })
+    p.select("test_wave")
+    run_for(p, wdt, 3000)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 100)
+
+
+if __name__ == "__main__":
+    main()