feat(patterns,api): pattern OTA, graceful shutdown, driver delivery updates

- Pattern controller/UI and presets patterns tab for OTA to Wi-Fi drivers
- Device controller extensions; driver_delivery chunk handling
- main: SIGINT/SIGTERM shutdown, TCP/UDP server close coordination
- Submodule led-driver: Wi-Fi default transport, lazy espnow import, dynamic patterns

Made-with: Cursor

src/controllers/device.py

@@ -14,6 +14,7 @@ from models.tcp_clients import (
 from util.espnow_message import build_message
 import asyncio
 import json
+import os
 
 # Ephemeral driver preset name (never written to Pi preset store; ``save`` not set on wire).
 _IDENTIFY_PRESET_KEY = "__identify"
@@ -72,6 +73,37 @@ def _device_json_with_live_status(dev_dict):
     return row
 
 
+def _driver_patterns_dir():
+    here = os.path.dirname(__file__)
+    return os.path.abspath(os.path.join(here, "../../led-driver/src/patterns"))
+
+
+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 _build_patterns_manifest(host):
+    base_dir = _driver_patterns_dir()
+    names = sorted(os.listdir(base_dir))
+    files = []
+    for name in names:
+        if not _safe_pattern_filename(name) or name == "__init__.py":
+            continue
+        files.append(
+            {
+                "name": name,
+                "url": "http://%s/patterns/ota/file/%s" % (host, name),
+            }
+        )
+    return {"files": files}
+
+
 async def _identify_send_off_after_delay(sender, transport, wifi_ip, dev_id, name):
     try:
         await asyncio.sleep(IDENTIFY_OFF_DELAY_S)
@@ -259,3 +291,56 @@ async def identify_device(request, id):
     return json.dumps({"message": "Identify sent"}), 200, {
         "Content-Type": "application/json",
     }
+
+
+@controller.post("/<id>/patterns/push")
+async def push_patterns_ota(request, id):
+    """
+    Ask a Wi-Fi LED driver to pull pattern files from this server over HTTP.
+
+    Body (optional):
+      {"manifest": "http://host:port/patterns/ota/manifest"}
+    """
+    dev = devices.read(id)
+    if not dev:
+        return json.dumps({"error": "Device not found"}), 404, {
+            "Content-Type": "application/json",
+        }
+    if (dev.get("transport") or "").lower() != "wifi":
+        return json.dumps({"error": "Pattern OTA push is only supported for Wi-Fi devices"}), 400, {
+            "Content-Type": "application/json",
+        }
+    wifi_ip = str(dev.get("address") or "").strip()
+    if not wifi_ip:
+        return json.dumps({"error": "Device has no IP address"}), 400, {
+            "Content-Type": "application/json",
+        }
+
+    body = request.json or {}
+    manifest_payload = body.get("manifest")
+    if manifest_payload is None:
+        host = request.headers.get("Host", "")
+        if not host:
+            return json.dumps({"error": "Missing Host header"}), 400, {
+                "Content-Type": "application/json",
+            }
+        try:
+            manifest_payload = _build_patterns_manifest(host)
+        except OSError as e:
+            return json.dumps({"error": str(e)}), 500, {
+                "Content-Type": "application/json",
+            }
+    if not isinstance(manifest_payload, (str, dict)):
+        return json.dumps({"error": "manifest must be a URL string or manifest object"}), 400, {
+            "Content-Type": "application/json",
+        }
+
+    msg = json.dumps({"v": "1", "manifest": manifest_payload}, separators=(",", ":"))
+    ok = await send_json_line_to_ip(wifi_ip, msg)
+    if not ok:
+        return json.dumps({"error": "Wi-Fi driver not connected"}), 503, {
+            "Content-Type": "application/json",
+        }
+    return json.dumps({"message": "Pattern OTA trigger sent", "manifest": manifest_payload}), 200, {
+        "Content-Type": "application/json",
+    }

src/controllers/pattern.py

@@ -1,19 +1,67 @@
 from microdot import Microdot
 from models.pattern import Pattern
+from models.device import Device
+from models.tcp_clients import send_json_line_to_ip
 import json
+import re
 import sys
+import os
 
 controller = Microdot()
 patterns = Pattern()
 
+
+def _project_root():
+    """Project root (parent of ``src/``). CWD is often ``src/`` when running ``main.py``."""
+    here = os.path.dirname(os.path.abspath(__file__))
+    return os.path.abspath(os.path.join(here, "..", ".."))
+
+
+def _driver_patterns_dir():
+    here = os.path.dirname(__file__)
+    return os.path.abspath(os.path.join(here, "../../led-driver/src/patterns"))
+
+
+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
+
+
+_PATTERN_KEY_RE = re.compile(r"^[a-zA-Z_][a-zA-Z0-9_]{0,63}$")
+
+
+def _normalize_pattern_key(raw):
+    """Pattern id / module basename (no .py)."""
+    if not isinstance(raw, str):
+        return ""
+    s = raw.strip()
+    if s.lower().endswith(".py"):
+        s = s[:-3].strip()
+    return s
+
+
+def _valid_pattern_key(key):
+    return bool(key and _PATTERN_KEY_RE.match(key))
+
 def load_pattern_definitions():
     """Load pattern definitions from pattern.json file."""
     try:
-        # Try different paths for local development vs MicroPython
-        paths = ['db/pattern.json', 'pattern.json', '/db/pattern.json']
+        root = _project_root()
+        paths = [
+            os.path.join(root, "db", "pattern.json"),
+            os.path.join(root, "pattern.json"),
+            "db/pattern.json",
+            "pattern.json",
+            "/db/pattern.json",
+        ]
         for path in paths:
             try:
-                with open(path, 'r') as f:
+                with open(path, "r") as f:
                     return json.load(f)
             except OSError:
                 continue
@@ -22,16 +70,301 @@ def load_pattern_definitions():
         print(f"Error loading pattern.json: {e}")
         return {}
 
+
+def load_driver_pattern_names():
+    """List available pattern module names from led-driver/src/patterns."""
+    try:
+        names = []
+        for filename in os.listdir(_driver_patterns_dir()):
+            if not _safe_pattern_filename(filename) or filename == "__init__.py":
+                continue
+            names.append(filename[:-3])
+        names.sort()
+        return names
+    except OSError:
+        return []
+
+
+def build_runtime_pattern_map():
+    """
+    Runtime pattern map for UI menus.
+    Keep pattern DB metadata as primary, then add any local driver pattern files
+    missing from the DB so new OTA files still appear in menus.
+    """
+    definitions = load_pattern_definitions()
+    available = load_driver_pattern_names()
+    result = {}
+    for name, meta in definitions.items():
+        result[name] = dict(meta) if isinstance(meta, dict) else {}
+    for name in available:
+        if name not in result:
+            result[name] = {}
+    return result
+
 @controller.get('/definitions')
 async def get_pattern_definitions(request):
-    """Get pattern definitions from pattern.json."""
-    definitions = load_pattern_definitions()
+    """Get definitions for patterns currently available on the driver."""
+    definitions = build_runtime_pattern_map()
     return json.dumps(definitions), 200, {'Content-Type': 'application/json'}
 
+
+@controller.get('/ota/manifest')
+async def ota_manifest(request):
+    """Manifest of driver pattern source files for OTA pulls."""
+    base_dir = _driver_patterns_dir()
+    host = request.headers.get("Host", "")
+    if not host:
+        return json.dumps({"error": "Missing Host header"}), 400, {
+            "Content-Type": "application/json"
+        }
+    try:
+        names = sorted(os.listdir(base_dir))
+    except OSError as e:
+        return json.dumps({"error": str(e)}), 500, {"Content-Type": "application/json"}
+
+    files = []
+    for name in names:
+        if not _safe_pattern_filename(name) or name == "__init__.py":
+            continue
+        files.append({
+            "name": name,
+            "url": "http://%s/patterns/ota/file/%s" % (host, name),
+        })
+
+    return json.dumps({"files": files}), 200, {"Content-Type": "application/json"}
+
+
+@controller.get('/ota/file/<name>')
+async def ota_pattern_file(request, name):
+    """Serve one driver pattern source file for OTA pulls."""
+    if not _safe_pattern_filename(name) or name == "__init__.py":
+        return json.dumps({"error": "Invalid filename"}), 400, {
+            "Content-Type": "application/json"
+        }
+    path = os.path.join(_driver_patterns_dir(), name)
+    try:
+        with open(path, "r") as f:
+            content = f.read()
+    except OSError:
+        return json.dumps({"error": "Pattern file not found"}), 404, {
+            "Content-Type": "application/json"
+        }
+    return content, 200, {"Content-Type": "text/plain; charset=utf-8"}
+
+
+@controller.post('/<name>/send')
+async def send_pattern_to_device(request, name):
+    """Tell Wi-Fi driver(s) to download one pattern source file over HTTP."""
+    if not isinstance(name, str):
+        return json.dumps({"error": "Invalid pattern name"}), 400, {
+            "Content-Type": "application/json"
+        }
+    filename = name if name.endswith(".py") else (name + ".py")
+    if not _safe_pattern_filename(filename) or filename == "__init__.py":
+        return json.dumps({"error": "Invalid pattern filename"}), 400, {
+            "Content-Type": "application/json"
+        }
+
+    devices = Device()
+    body = request.json or {}
+    requested_device_id = str(body.get("device_id") or "").strip()
+
+    path = os.path.join(_driver_patterns_dir(), filename)
+    if not os.path.exists(path):
+        return json.dumps({"error": "Pattern file not found"}), 404, {
+            "Content-Type": "application/json"
+        }
+
+    file_url = "/patterns/ota/file/%s" % filename
+
+    msg = json.dumps(
+        {
+            "v": "1",
+            "manifest": {
+                "files": [
+                    {
+                        "name": filename,
+                        "url": file_url,
+                    }
+                ]
+            },
+        },
+        separators=(",", ":"),
+    )
+    target_ids = []
+    if requested_device_id:
+        dev = devices.read(requested_device_id)
+        if not dev:
+            return json.dumps({"error": "Device not found"}), 404, {
+                "Content-Type": "application/json"
+            }
+        if (dev.get("transport") or "").lower() != "wifi":
+            return json.dumps({"error": "Pattern send is only supported for Wi-Fi devices"}), 400, {
+                "Content-Type": "application/json"
+            }
+        target_ids = [requested_device_id]
+    else:
+        for did in devices.list():
+            dev = devices.read(did) or {}
+            if (dev.get("transport") or "").lower() == "wifi":
+                target_ids.append(str(did))
+        if not target_ids:
+            return json.dumps({"error": "No Wi-Fi devices found"}), 404, {
+                "Content-Type": "application/json"
+            }
+
+    sent_ids = []
+    for did in target_ids:
+        dev = devices.read(did) or {}
+        ip = str(dev.get("address") or "").strip()
+        if not ip:
+            continue
+        ok = await send_json_line_to_ip(ip, msg)
+        if ok:
+            sent_ids.append(did)
+
+    if not sent_ids:
+        return json.dumps({"error": "No Wi-Fi drivers connected"}), 503, {
+            "Content-Type": "application/json"
+        }
+    return json.dumps({"message": "Pattern sent", "pattern": filename, "device_ids": sent_ids, "sent_count": len(sent_ids)}), 200, {
+        "Content-Type": "application/json"
+    }
+
+
+@controller.post('/upload')
+async def upload_pattern_file(request):
+    """
+    Upload a pattern source file to led-controller local storage.
+
+    Body JSON:
+      {
+        "name": "sparkle.py" | "sparkle",
+        "code": "class Sparkle: ...",
+        "overwrite": true | false   # optional, default true
+      }
+    """
+    data = request.json or {}
+    raw_name = data.get("name") or data.get("filename")
+    code = data.get("code")
+    overwrite = data.get("overwrite", True)
+    overwrite = bool(overwrite)
+
+    if not isinstance(raw_name, str) or not raw_name.strip():
+        return json.dumps({"error": "name is required"}), 400, {
+            "Content-Type": "application/json"
+        }
+    filename = raw_name.strip()
+    if not filename.endswith(".py"):
+        filename += ".py"
+    if not _safe_pattern_filename(filename) or filename == "__init__.py":
+        return json.dumps({"error": "invalid pattern filename"}), 400, {
+            "Content-Type": "application/json"
+        }
+    if not isinstance(code, str) or not code.strip():
+        return json.dumps({"error": "code is required"}), 400, {
+            "Content-Type": "application/json"
+        }
+
+    path = os.path.join(_driver_patterns_dir(), filename)
+    exists = os.path.exists(path)
+    if exists and not overwrite:
+        return json.dumps({"error": "pattern file already exists", "name": filename}), 409, {
+            "Content-Type": "application/json"
+        }
+
+    try:
+        with open(path, "w") as f:
+            f.write(code)
+    except OSError as e:
+        return json.dumps({"error": str(e)}), 500, {"Content-Type": "application/json"}
+
+    return json.dumps({
+        "message": "Pattern uploaded",
+        "name": filename,
+        "overwrote": bool(exists),
+    }), 201, {"Content-Type": "application/json"}
+
+
+@controller.post('/driver')
+async def create_driver_pattern(request):
+    """
+    Create a driver pattern: save ``.py`` under led-driver/src/patterns and
+    metadata in db/pattern.json (Pattern model).
+
+    Body JSON:
+      name, code (required),
+      min_delay, max_delay, max_colors (optional numbers),
+      n1..n8 (optional string labels),
+      overwrite (optional, default true).
+    """
+    data = request.json or {}
+    key = _normalize_pattern_key(data.get("name") or "")
+    if not _valid_pattern_key(key):
+        return json.dumps({
+            "error": "name must be a valid Python identifier (e.g. sparkle, my_pattern)",
+        }), 400, {"Content-Type": "application/json"}
+
+    code = data.get("code")
+    if not isinstance(code, str) or not code.strip():
+        return json.dumps({"error": "code is required (upload a .py file or paste source)"}), 400, {
+            "Content-Type": "application/json"
+        }
+
+    overwrite = bool(data.get("overwrite", True))
+
+    filename = key + ".py"
+    py_path = os.path.join(_driver_patterns_dir(), filename)
+    if os.path.exists(py_path) and not overwrite:
+        return json.dumps({"error": "pattern file already exists", "name": filename}), 409, {
+            "Content-Type": "application/json"
+        }
+
+    meta = {}
+    for fld in ("min_delay", "max_delay", "max_colors"):
+        if fld not in data:
+            continue
+        try:
+            meta[fld] = int(data[fld])
+        except (TypeError, ValueError):
+            return json.dumps({"error": "%s must be an integer" % fld}), 400, {
+                "Content-Type": "application/json"
+            }
+
+    for i in range(1, 9):
+        nk = "n%d" % i
+        if nk not in data:
+            continue
+        lab = data[nk]
+        if lab is None:
+            continue
+        s = str(lab).strip()
+        if s:
+            meta[nk] = s
+
+    try:
+        with open(py_path, "w") as f:
+            f.write(code)
+    except OSError as e:
+        return json.dumps({"error": str(e)}), 500, {"Content-Type": "application/json"}
+
+    if patterns.read(key):
+        patterns.update(key, meta)
+    else:
+        patterns.create(key, meta)
+
+    return json.dumps({
+        "message": "Pattern created",
+        "name": key,
+        "file": filename,
+        "metadata": patterns.read(key),
+    }), 201, {"Content-Type": "application/json"}
+
+
 @controller.get('')
 async def list_patterns(request):
-    """List all patterns."""
-    return json.dumps(patterns), 200, {'Content-Type': 'application/json'}
+    """List patterns for UI (DB metadata + local driver additions)."""
+    return json.dumps(build_runtime_pattern_map()), 200, {'Content-Type': 'application/json'}
 
 
 @controller.get('/<id>')

src/main.py

@@ -2,6 +2,7 @@ import asyncio
 import errno
 import json
 import os
+import signal
 import socket
 import threading
 import traceback
@@ -127,12 +128,17 @@ def _register_udp_device_sync(
             traceback.print_exception(type(e), e, e.__traceback__)
 
 
-async def _handle_udp_discovery(sock) -> None:
+async def _handle_udp_discovery(sock, udp_holder=None) -> None:
     while True:
         try:
             data, addr = await asyncio.get_running_loop().sock_recvfrom(sock, 2048)
         except asyncio.CancelledError:
             raise
+        except OSError as e:
+            if udp_holder and udp_holder.get("closing"):
+                break
+            print(f"[UDP] recv failed: {e!r}")
+            continue
         except Exception as e:
             print(f"[UDP] recv failed: {e!r}")
             continue
@@ -157,7 +163,7 @@ async def _handle_udp_discovery(sock) -> None:
             print(f"[UDP] echo send failed: {e!r}")
 
 
-async def _run_udp_discovery_server() -> None:
+async def _run_udp_discovery_server(udp_holder=None) -> None:
     sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
     sock.setblocking(False)
     try:
@@ -169,10 +175,14 @@ async def _run_udp_discovery_server() -> None:
     except (AttributeError, OSError):
         pass
     sock.bind(("0.0.0.0", DISCOVERY_UDP_PORT))
+    if udp_holder is not None:
+        udp_holder["sock"] = sock
     print(f"UDP discovery listening on 0.0.0.0:{DISCOVERY_UDP_PORT}")
     try:
-        await _handle_udp_discovery(sock)
+        await _handle_udp_discovery(sock, udp_holder)
     finally:
+        if udp_holder is not None:
+            udp_holder.pop("sock", None)
         try:
             sock.close()
         except Exception:
@@ -275,15 +285,21 @@ async def _send_bridge_wifi_channel(settings, sender):
         print(f"[startup] bridge channel message failed: {e}")
 
 
-async def _run_tcp_server(settings):
+async def _run_tcp_server(settings, tcp_holder=None):
     if not settings.get("tcp_enabled", True):
         print("TCP server disabled (tcp_enabled=false)")
         return
     port = int(settings.get("tcp_port", 8765))
     server = await asyncio.start_server(_handle_tcp_client, "0.0.0.0", port)
     print(f"TCP server listening on 0.0.0.0:{port}")
-    async with server:
-        await server.serve_forever()
+    if tcp_holder is not None:
+        tcp_holder["server"] = server
+    try:
+        async with server:
+            await server.serve_forever()
+    finally:
+        if tcp_holder is not None:
+            tcp_holder.pop("server", None)
 
 
 async def main(port=80):
@@ -395,25 +411,60 @@ async def main(port=80):
     Device()
     await _send_bridge_wifi_channel(settings, sender)
 
-    # Await HTTP + driver TCP together so bind failures (e.g. port 80 in use) surface
-    # here instead of as an unretrieved Task exception; the UI WebSocket drops if HTTP
-    # never starts, which clears Wi-Fi presence dots.
+    tcp_holder = {}
+    udp_holder = {"closing": False}
+    loop = asyncio.get_running_loop()
+
+    def _graceful_shutdown(*_args):
+        print("[server] shutting down...")
+        udp_holder["closing"] = True
+        u = udp_holder.get("sock")
+        if u is not None:
+            try:
+                u.close()
+            except OSError:
+                pass
+        s = tcp_holder.get("server")
+        if s is not None:
+            s.close()
+        if getattr(app, "server", None) is not None:
+            app.shutdown()
+
+    shutdown_handlers_registered = False
     try:
-        await asyncio.gather(
-            app.start_server(host="0.0.0.0", port=port),
-            _run_tcp_server(settings),
-            _run_udp_discovery_server(),
-        )
-    except OSError as e:
-        if e.errno == errno.EADDRINUSE:
-            tcp_p = int(settings.get("tcp_port", 8765))
-            print(
-                f"[server] bind failed (address already in use): {e!s}\n"
-                f"[server] HTTP is configured for port {port} (env PORT); "
-                f"Wi-Fi LED drivers use tcp_port {tcp_p}. "
-                f"Stop the other process or use a free port, e.g. PORT=8080 pipenv run run"
+        try:
+            for sig in (signal.SIGINT, signal.SIGTERM):
+                loop.add_signal_handler(sig, _graceful_shutdown)
+            shutdown_handlers_registered = True
+        except (NotImplementedError, RuntimeError):
+            pass
+
+        # Await HTTP + driver TCP together so bind failures (e.g. port 80 in use) surface
+        # here instead of as an unretrieved Task exception; the UI WebSocket drops if HTTP
+        # never starts, which clears Wi-Fi presence dots.
+        try:
+            await asyncio.gather(
+                app.start_server(host="0.0.0.0", port=port),
+                _run_tcp_server(settings, tcp_holder),
+                _run_udp_discovery_server(udp_holder),
             )
-        raise
+        except OSError as e:
+            if e.errno == errno.EADDRINUSE:
+                tcp_p = int(settings.get("tcp_port", 8765))
+                print(
+                    f"[server] bind failed (address already in use): {e!s}\n"
+                    f"[server] HTTP is configured for port {port} (env PORT); "
+                    f"Wi-Fi LED drivers use tcp_port {tcp_p}. "
+                    f"Stop the other process or use a free port, e.g. PORT=8080 pipenv run run"
+                )
+            raise
+    finally:
+        if shutdown_handlers_registered:
+            for sig in (signal.SIGINT, signal.SIGTERM):
+                try:
+                    loop.remove_signal_handler(sig)
+                except (NotImplementedError, OSError, ValueError):
+                    pass
 
 if __name__ == "__main__":
     import os

src/static/patterns.js

@@ -3,11 +3,301 @@ document.addEventListener('DOMContentLoaded', () => {
   const patternsModal = document.getElementById('patterns-modal');
   const patternsCloseButton = document.getElementById('patterns-close-btn');
   const patternsList = document.getElementById('patterns-list');
+  const patternAddButton = document.getElementById('pattern-add-btn');
+  const patternEditorModal = document.getElementById('pattern-editor-modal');
+  const patternEditorCloseButton = document.getElementById('pattern-editor-close-btn');
+  const patternCreateBtn = document.getElementById('pattern-create-btn');
+  const patternCreateName = document.getElementById('pattern-create-name');
+  const patternCreateMinDelay = document.getElementById('pattern-create-min-delay');
+  const patternCreateMaxDelay = document.getElementById('pattern-create-max-delay');
+  const patternCreateMaxColors = document.getElementById('pattern-create-max-colors');
+  const patternCreateFile = document.getElementById('pattern-create-file');
+  const patternCreateCode = document.getElementById('pattern-create-code');
+  const patternCreateOverwrite = document.getElementById('pattern-create-overwrite');
+  const patternCreateN = [1, 2, 3, 4, 5, 6, 7, 8].map((i) =>
+    document.getElementById(`pattern-create-n${i}`),
+  );
+  const patternCreateNSection = document.getElementById('pattern-create-n-section');
+  const patternCreateNEmpty = document.getElementById('pattern-create-n-empty');
 
   if (!patternsButton || !patternsModal || !patternsList) {
     return;
   }
 
+  const nReadableStringFromMeta = (meta, key) => {
+    if (!meta || typeof meta !== 'object') {
+      return '';
+    }
+    const pm = meta.parameter_mappings;
+    if (pm && typeof pm === 'object' && typeof pm[key] === 'string') {
+      const s = pm[key].trim();
+      if (s) {
+        return s;
+      }
+    }
+    if (typeof meta[key] === 'string') {
+      return meta[key].trim();
+    }
+    return '';
+  };
+
+  const setPatternEditorNFields = (mode, data) => {
+    const meta = data && typeof data === 'object' ? data : {};
+    let visible = 0;
+    const grid = patternCreateNSection && patternCreateNSection.querySelector('.n-params-grid');
+    const h3 = patternCreateNSection && patternCreateNSection.querySelector('h3');
+
+    for (let i = 1; i <= 8; i += 1) {
+      const key = `n${i}`;
+      const labelEl = document.querySelector(`label[for="pattern-create-${key}"]`);
+      const inputEl = document.getElementById(`pattern-create-${key}`);
+      const groupEl = labelEl ? labelEl.closest('.n-param-group') : null;
+
+      if (mode === 'create') {
+        if (labelEl) {
+          labelEl.textContent = '';
+          labelEl.style.display = 'none';
+        }
+        if (inputEl) {
+          inputEl.value = '';
+          inputEl.placeholder = 'Readable name (optional)';
+          inputEl.removeAttribute('aria-label');
+        }
+        if (groupEl) {
+          groupEl.style.display = '';
+        }
+        continue;
+      }
+
+      const readable = nReadableStringFromMeta(meta, key);
+      const show = Boolean(readable);
+      if (labelEl) {
+        labelEl.textContent = '';
+        labelEl.style.display = 'none';
+      }
+      if (inputEl) {
+        inputEl.value = show ? readable : '';
+        inputEl.placeholder = '';
+        if (show) {
+          inputEl.setAttribute('aria-label', readable);
+        } else {
+          inputEl.removeAttribute('aria-label');
+          inputEl.value = '';
+        }
+      }
+      if (groupEl) {
+        groupEl.style.display = show ? '' : 'none';
+      }
+      if (show) {
+        visible += 1;
+      }
+    }
+
+    if (mode === 'create') {
+      if (patternCreateNEmpty) {
+        patternCreateNEmpty.style.display = 'none';
+      }
+      if (grid) {
+        grid.style.display = '';
+      }
+      if (h3) {
+        h3.style.display = '';
+      }
+      if (patternCreateNSection) {
+        patternCreateNSection.style.display = '';
+      }
+      return;
+    }
+
+    if (patternCreateNEmpty) {
+      patternCreateNEmpty.style.display = visible === 0 ? '' : 'none';
+    }
+    if (grid) {
+      grid.style.display = visible === 0 ? 'none' : '';
+    }
+    if (h3) {
+      h3.style.display = visible === 0 ? 'none' : '';
+    }
+  };
+
+  const readFileAsText = (file) =>
+    new Promise((resolve, reject) => {
+      const reader = new FileReader();
+      reader.onload = () => resolve(String(reader.result || ''));
+      reader.onerror = () => reject(reader.error || new Error('read failed'));
+      reader.readAsText(file);
+    });
+
+  const collectCreatePayload = async () => {
+    const name = patternCreateName ? patternCreateName.value.trim() : '';
+    if (!name) {
+      throw new Error('Pattern name is required.');
+    }
+    let code = '';
+    const fileInput = patternCreateFile && patternCreateFile.files && patternCreateFile.files[0];
+    if (fileInput) {
+      code = await readFileAsText(fileInput);
+    } else if (patternCreateCode && patternCreateCode.value.trim()) {
+      code = patternCreateCode.value;
+    }
+    if (!code.trim()) {
+      throw new Error('Choose a .py file or paste source code.');
+    }
+
+    const payload = {
+      name,
+      code,
+      min_delay: parseInt(patternCreateMinDelay && patternCreateMinDelay.value, 10) || 0,
+      max_delay: parseInt(patternCreateMaxDelay && patternCreateMaxDelay.value, 10) || 0,
+      max_colors: parseInt(patternCreateMaxColors && patternCreateMaxColors.value, 10) || 0,
+      overwrite: !!(patternCreateOverwrite && patternCreateOverwrite.checked),
+    };
+
+    patternCreateN.forEach((el, idx) => {
+      const key = `n${idx + 1}`;
+      if (el && el.value.trim()) {
+        payload[key] = el.value.trim();
+      }
+    });
+
+    return payload;
+  };
+
+  const resetCreateForm = () => {
+    if (patternCreateName) patternCreateName.value = '';
+    if (patternCreateFile) patternCreateFile.value = '';
+    if (patternCreateCode) patternCreateCode.value = '';
+    if (patternCreateMinDelay) patternCreateMinDelay.value = '10';
+    if (patternCreateMaxDelay) patternCreateMaxDelay.value = '10000';
+    if (patternCreateMaxColors) patternCreateMaxColors.value = '10';
+    patternCreateN.forEach((el) => {
+      if (el) el.value = '';
+    });
+    if (patternCreateOverwrite) patternCreateOverwrite.checked = true;
+    setPatternEditorNFields('create', {});
+  };
+
+  if (patternCreateBtn) {
+    patternCreateBtn.addEventListener('click', async () => {
+      try {
+        const payload = await collectCreatePayload();
+        const response = await fetch('/patterns/driver', {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json', Accept: 'application/json' },
+          body: JSON.stringify(payload),
+        });
+        const data = await response.json().catch(() => ({}));
+        if (!response.ok) {
+          throw new Error((data && data.error) || 'Create failed');
+        }
+        alert(data.message || 'Pattern created.');
+        resetCreateForm();
+        if (patternEditorModal) {
+          patternEditorModal.classList.remove('active');
+        }
+        await loadPatterns();
+      } catch (e) {
+        console.error('Create pattern failed:', e);
+        alert(e.message || 'Failed to create pattern.');
+      }
+    });
+  }
+
+  const sendPatternToDevices = async (patternName) => {
+    const response = await fetch(`/patterns/${encodeURIComponent(patternName)}/send`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json', Accept: 'application/json' },
+      body: JSON.stringify({}),
+    });
+    const data = await response.json().catch(() => ({}));
+    if (!response.ok) {
+      throw new Error((data && data.error) || 'Failed to send pattern');
+    }
+    const sentCount = data && typeof data.sent_count === 'number' ? data.sent_count : null;
+    if (sentCount === null) {
+      alert(`Sent "${patternName}" to devices.`);
+    } else {
+      alert(`Sent "${patternName}" to ${sentCount} device(s).`);
+    }
+  };
+
+  const loadPatternMetadata = async (patternName, fallbackData) => {
+    const raw = String(patternName || '').trim();
+    const norm = raw.endsWith('.py') ? raw.slice(0, -3).trim() : raw;
+    try {
+      const response = await fetch('/patterns/definitions', {
+        headers: { Accept: 'application/json' },
+      });
+      if (!response.ok) {
+        throw new Error('Failed to load pattern definitions');
+      }
+      const definitions = await response.json();
+      if (definitions && typeof definitions === 'object') {
+        if (definitions[raw]) {
+          return definitions[raw];
+        }
+        if (norm && definitions[norm]) {
+          return definitions[norm];
+        }
+        if (norm) {
+          const lower = norm.toLowerCase();
+          const matched = Object.keys(definitions).find(
+            (k) => String(k).toLowerCase() === lower,
+          );
+          if (matched) {
+            return definitions[matched];
+          }
+        }
+      }
+    } catch (error) {
+      console.error('Load pattern definitions failed:', error);
+    }
+    return fallbackData || {};
+  };
+
+  const loadPatternIntoEditor = async (patternName, fallbackData) => {
+    const data = await loadPatternMetadata(patternName, fallbackData);
+    if (patternCreateName) {
+      patternCreateName.value = patternName;
+    }
+    if (patternCreateMinDelay) {
+      patternCreateMinDelay.value =
+        data && data.min_delay !== undefined ? String(data.min_delay) : '10';
+    }
+    if (patternCreateMaxDelay) {
+      patternCreateMaxDelay.value =
+        data && data.max_delay !== undefined ? String(data.max_delay) : '10000';
+    }
+    if (patternCreateMaxColors) {
+      patternCreateMaxColors.value =
+        data && data.max_colors !== undefined ? String(data.max_colors) : '10';
+    }
+    setPatternEditorNFields('edit', data);
+    if (patternCreateOverwrite) {
+      patternCreateOverwrite.checked = true;
+    }
+    if (patternCreateFile) {
+      patternCreateFile.value = '';
+    }
+
+    try {
+      const response = await fetch(`/patterns/ota/file/${encodeURIComponent(patternName)}.py`, {
+        headers: { Accept: 'text/plain' },
+      });
+      if (!response.ok) {
+        throw new Error('Failed to load pattern file');
+      }
+      const source = await response.text();
+      if (patternCreateCode) {
+        patternCreateCode.value = source || '';
+        patternCreateCode.focus();
+      }
+    } catch (error) {
+      console.error('Load pattern source failed:', error);
+      alert('Could not load pattern source into editor.');
+    }
+  };
+
   const renderPatterns = (patterns) => {
     patternsList.innerHTML = '';
     const entries = Object.entries(patterns || {});
@@ -32,13 +322,37 @@ document.addEventListener('DOMContentLoaded', () => {
       details.style.color = '#aaa';
       details.style.fontSize = '0.85em';
 
+      const sendBtn = document.createElement('button');
+      sendBtn.className = 'btn btn-primary btn-small';
+      sendBtn.textContent = 'Send';
+      sendBtn.addEventListener('click', async () => {
+        try {
+          await sendPatternToDevices(patternName);
+        } catch (error) {
+          console.error('Send pattern failed:', error);
+          alert(error.message || 'Failed to send pattern.');
+        }
+      });
+
+      const editBtn = document.createElement('button');
+      editBtn.className = 'btn btn-secondary btn-small';
+      editBtn.textContent = 'Edit';
+      editBtn.addEventListener('click', async () => {
+        if (patternEditorModal) {
+          patternEditorModal.classList.add('active');
+        }
+        await loadPatternIntoEditor(patternName, data || {});
+      });
+
       row.appendChild(label);
       row.appendChild(details);
+      row.appendChild(editBtn);
+      row.appendChild(sendBtn);
       patternsList.appendChild(row);
     });
   };
 
-  const loadPatterns = async () => {
+  async function loadPatterns() {
     patternsList.innerHTML = '';
     const loading = document.createElement('p');
     loading.className = 'muted-text';
@@ -62,7 +376,7 @@ document.addEventListener('DOMContentLoaded', () => {
       errorMessage.textContent = 'Failed to load patterns.';
       patternsList.appendChild(errorMessage);
     }
-  };
+  }
 
   const openModal = () => {
     patternsModal.classList.add('active');
@@ -74,6 +388,21 @@ document.addEventListener('DOMContentLoaded', () => {
   };
 
   patternsButton.addEventListener('click', openModal);
+  if (patternAddButton) {
+    patternAddButton.addEventListener('click', () => {
+      resetCreateForm();
+      if (patternEditorModal) {
+        patternEditorModal.classList.add('active');
+      }
+    });
+  }
+  if (patternEditorCloseButton) {
+    patternEditorCloseButton.addEventListener('click', () => {
+      if (patternEditorModal) {
+        patternEditorModal.classList.remove('active');
+      }
+    });
+  }
   if (patternsCloseButton) {
     patternsCloseButton.addEventListener('click', closeModal);
   }

src/static/presets.js

@@ -548,14 +548,10 @@ document.addEventListener('DOMContentLoaded', () => {
       presetPatternInput.style.cursor = '';
     }
 
-    // Update labels and visibility based on pattern
-    updatePresetNLabels(patternName);
-    
     // Get pattern config to map descriptive names back to n keys
     const patternConfig = cachedPatterns && cachedPatterns[patternName];
     const nToLabel = {};
     if (patternConfig && typeof patternConfig === 'object') {
-      // Now n keys are keys, labels are values
       Object.entries(patternConfig).forEach(([nKey, label]) => {
         if (typeof nKey === 'string' && nKey.startsWith('n') && typeof label === 'string') {
           nToLabel[nKey] = label;
@@ -568,11 +564,9 @@ document.addEventListener('DOMContentLoaded', () => {
       const nKey = `n${i}`;
       const inputEl = document.getElementById(`preset-${nKey}-input`);
       if (inputEl) {
-        // First check if preset has n key directly
         if (preset[nKey] !== undefined) {
           inputEl.value = preset[nKey] || 0;
         } else {
-          // Check if preset has descriptive name (from pattern.json mapping)
           const label = nToLabel[nKey];
           if (label && preset[label] !== undefined) {
             inputEl.value = preset[label] || 0;
@@ -582,6 +576,9 @@ document.addEventListener('DOMContentLoaded', () => {
         }
       }
     }
+
+    // After values: show only mapped n params with labels from pattern.json; clear hidden inputs
+    updatePresetNLabels(patternName);
     updatePresetEditorTabActionsVisibility();
   };
 
@@ -774,44 +771,65 @@ document.addEventListener('DOMContentLoaded', () => {
   };
 
   const updatePresetNLabels = (patternName) => {
+    const rawPatternName = String(patternName || '').trim();
+    const normalizedPatternName = rawPatternName.endsWith('.py')
+      ? rawPatternName.slice(0, -3)
+      : rawPatternName;
+    let patternConfig =
+      (cachedPatterns && cachedPatterns[rawPatternName]) ||
+      (cachedPatterns && cachedPatterns[normalizedPatternName]) ||
+      null;
+    if (!patternConfig && cachedPatterns && typeof cachedPatterns === 'object') {
+      const lower = normalizedPatternName.toLowerCase();
+      const matchedKey = Object.keys(cachedPatterns).find(
+        (k) => String(k).toLowerCase() === lower,
+      );
+      if (matchedKey) {
+        patternConfig = cachedPatterns[matchedKey];
+      }
+    }
+    if (patternConfig && typeof patternConfig === 'object' && patternConfig.data && typeof patternConfig.data === 'object') {
+      patternConfig = patternConfig.data;
+    }
+    if (patternConfig && typeof patternConfig === 'object' && patternConfig.parameter_mappings && typeof patternConfig.parameter_mappings === 'object') {
+      patternConfig = patternConfig.parameter_mappings;
+    }
     const labels = {};
     const visibleNKeys = new Set();
 
-    // Initialize all labels with default n1:, n2:, etc.
-    for (let i = 1; i <= 8; i++) {
-      labels[`n${i}`] = `n${i}:`;
-    }
-    
-    const patternConfig = cachedPatterns && cachedPatterns[patternName];
     if (patternConfig && typeof patternConfig === 'object') {
-      // Now n values are keys and descriptive names are values
       Object.entries(patternConfig).forEach(([key, label]) => {
         if (typeof key === 'string' && key.startsWith('n') && typeof label === 'string') {
-          labels[key] = `${label}:`;
-          visibleNKeys.add(key); // Mark this n key as visible
+          const text = label.trim();
+          if (text) {
+            labels[key] = `${text}:`;
+            visibleNKeys.add(key);
+          }
         }
       });
     }
 
-    // Update labels and show/hide input groups
     for (let i = 1; i <= 8; i++) {
       const nKey = `n${i}`;
       const labelEl = document.getElementById(`preset-${nKey}-label`);
-      const inputEl = document.getElementById(`preset-${nKey}-input`);
       const groupEl = labelEl ? labelEl.closest('.n-param-group') : null;
+      const show = visibleNKeys.has(nKey);
+      const inputEl = document.getElementById(`preset-${nKey}-input`);
 
       if (labelEl) {
-        labelEl.textContent = labels[nKey];
+        labelEl.textContent = show ? labels[nKey] : '';
       }
-      
-      // Show or hide the entire group based on whether it has a mapping
       if (groupEl) {
-        if (visibleNKeys.has(nKey)) {
-          groupEl.style.display = ''; // Show
-        } else {
-          groupEl.style.display = 'none'; // Hide
-        }
+        groupEl.style.display = show ? '' : 'none';
       }
+      if (inputEl && !show) {
+        inputEl.value = '0';
+      }
+    }
+
+    const nGrid = presetEditorModal && presetEditorModal.querySelector('.n-params-grid');
+    if (nGrid) {
+      nGrid.style.display = visibleNKeys.size > 0 ? '' : 'none';
     }
   };
 
@@ -845,6 +863,7 @@ document.addEventListener('DOMContentLoaded', () => {
       editButton.addEventListener('click', async () => {
         currentEditId = presetId;
         currentEditTabId = null;
+        await loadPatterns();
         const paletteColors = await getCurrentProfilePaletteColors();
         const presetForEditor = {
           ...(preset || {}),

src/static/style.css

@@ -458,22 +458,28 @@ body.preset-ui-run .edit-mode-only {
 .n-param-group {
     display: flex;
     align-items: center;
-    gap: 0.5rem;
+    gap: 0.75rem;
+    justify-content: space-between;
 }
 
 .n-param-group label {
-    min-width: 40px;
+    flex: 1;
+    min-width: 0;
     font-weight: 500;
 }
 
 .n-input {
-    flex: 1;
+    flex: 0 0 var(--n-input-width, 5ch);
+    width: var(--n-input-width, 5ch);
+    max-width: 100%;
+    box-sizing: border-box;
     padding: 0.5rem;
     background-color: #3a3a3a;
     color: white;
     border: 1px solid #4a4a4a;
     border-radius: 4px;
     font-size: 1rem;
+    text-align: right;
 }
 
 .n-input:focus {
@@ -1251,6 +1257,48 @@ body.preset-ui-run .edit-mode-only {
     flex: 1;
     display: flex;
     flex-direction: column;
+    align-items: flex-end;
+}
+
+.preset-editor-field label {
+    align-self: stretch;
+}
+
+.preset-editor-field input[type="number"] {
+    width: var(--n-input-width, 5ch);
+    max-width: 100%;
+    box-sizing: border-box;
+    text-align: right;
+}
+
+/* Pattern editor: numeric metadata row */
+#pattern-editor-modal input[type="number"] {
+    width: var(--n-input-width, 5ch);
+    max-width: 100%;
+    box-sizing: border-box;
+    text-align: right;
+}
+
+/* Pattern editor: human-readable n labels (text), full width */
+#pattern-editor-modal .n-params-grid {
+    grid-template-columns: 1fr;
+}
+
+#pattern-editor-modal .n-param-group:has(.pattern-n-readable-input) {
+    justify-content: stretch;
+}
+
+#pattern-editor-modal .pattern-n-readable-input {
+    flex: 1 1 auto;
+    width: 100%;
+    min-width: 0;
+    text-align: left;
+}
+
+@supports not selector(:has(*)) {
+    #pattern-editor-modal #pattern-create-n-section .n-param-group {
+        justify-content: stretch;
+    }
 }
 
 /* Settings modal */

src/templates/index.html

@@ -240,6 +240,9 @@
     <div id="patterns-modal" class="modal">
         <div class="modal-content">
             <h2>Patterns</h2>
+            <div class="modal-actions">
+                <button type="button" class="btn btn-primary" id="pattern-add-btn">Add</button>
+            </div>
             <div id="patterns-list" class="profiles-list"></div>
             <div class="modal-actions">
                 <button class="btn btn-secondary" id="patterns-close-btn">Close</button>
@@ -247,6 +250,78 @@
         </div>
     </div>
 
+    <!-- Pattern Editor Modal -->
+    <div id="pattern-editor-modal" class="modal">
+        <div class="modal-content">
+            <h2>Pattern</h2>
+            <p class="muted-text" style="margin: 0 0 0.75rem 0;">Add a driver <code>.py</code> file and editor metadata (stored in the pattern database).</p>
+            <div class="profiles-row" style="flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.5rem;">
+                <label for="pattern-create-name" style="min-width: 7rem;">Name</label>
+                <input type="text" id="pattern-create-name" class="preset-name-like" placeholder="e.g. sparkle" pattern="[a-zA-Z_][a-zA-Z0-9_]*" style="flex: 1; min-width: 12rem;" autocomplete="off">
+            </div>
+            <div class="profiles-row pattern-editor-meta-row" style="flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.5rem;">
+                <label for="pattern-create-min-delay" style="min-width: 7rem;">Min delay (ms)</label>
+                <input type="number" id="pattern-create-min-delay" min="0" value="10">
+                <label for="pattern-create-max-delay">Max delay (ms)</label>
+                <input type="number" id="pattern-create-max-delay" min="0" value="10000">
+                <label for="pattern-create-max-colors">Max colours</label>
+                <input type="number" id="pattern-create-max-colors" min="0" value="10">
+            </div>
+            <div id="pattern-create-n-section" class="n-params-section" style="margin-bottom: 0.5rem;">
+                <h3 class="muted-text">Readable parameter names</h3>
+                <p id="pattern-create-n-empty" class="muted-text" style="display: none; margin: 0 0 0.5rem 0;">No parameter names are stored for this pattern.</p>
+                <div class="n-params-grid">
+                    <div class="n-param-group">
+                        <label for="pattern-create-n1"></label>
+                        <input type="text" id="pattern-create-n1" class="n-input pattern-n-readable-input" placeholder="" autocomplete="off">
+                    </div>
+                    <div class="n-param-group">
+                        <label for="pattern-create-n2"></label>
+                        <input type="text" id="pattern-create-n2" class="n-input pattern-n-readable-input" placeholder="" autocomplete="off">
+                    </div>
+                    <div class="n-param-group">
+                        <label for="pattern-create-n3"></label>
+                        <input type="text" id="pattern-create-n3" class="n-input pattern-n-readable-input" placeholder="" autocomplete="off">
+                    </div>
+                    <div class="n-param-group">
+                        <label for="pattern-create-n4"></label>
+                        <input type="text" id="pattern-create-n4" class="n-input pattern-n-readable-input" placeholder="" autocomplete="off">
+                    </div>
+                    <div class="n-param-group">
+                        <label for="pattern-create-n5"></label>
+                        <input type="text" id="pattern-create-n5" class="n-input pattern-n-readable-input" placeholder="" autocomplete="off">
+                    </div>
+                    <div class="n-param-group">
+                        <label for="pattern-create-n6"></label>
+                        <input type="text" id="pattern-create-n6" class="n-input pattern-n-readable-input" placeholder="" autocomplete="off">
+                    </div>
+                    <div class="n-param-group">
+                        <label for="pattern-create-n7"></label>
+                        <input type="text" id="pattern-create-n7" class="n-input pattern-n-readable-input" placeholder="" autocomplete="off">
+                    </div>
+                    <div class="n-param-group">
+                        <label for="pattern-create-n8"></label>
+                        <input type="text" id="pattern-create-n8" class="n-input pattern-n-readable-input" placeholder="" autocomplete="off">
+                    </div>
+                </div>
+            </div>
+            <div class="profiles-row" style="flex-direction: column; align-items: stretch; gap: 0.35rem; margin-bottom: 0.5rem;">
+                <label for="pattern-create-file">Pattern file</label>
+                <input type="file" id="pattern-create-file" accept=".py,text/x-python,.PY">
+                <label for="pattern-create-code" class="muted-text" style="font-size: 0.85em;">Or paste Python source (if no file chosen)</label>
+                <textarea id="pattern-create-code" rows="5" style="width: 100%; font-family: monospace; font-size: 0.85rem;" placeholder="# class MyPattern: ..."></textarea>
+            </div>
+            <div class="modal-actions">
+                <label style="display: inline-flex; align-items: center; gap: 0.35rem; margin-right: auto;">
+                    <input type="checkbox" id="pattern-create-overwrite" checked>
+                    <span>Overwrite existing file</span>
+                </label>
+                <button type="button" class="btn btn-primary" id="pattern-create-btn">Save</button>
+                <button type="button" class="btn btn-secondary" id="pattern-editor-close-btn">Close</button>
+            </div>
+        </div>
+    </div>
+
     <!-- Colour Palette Modal -->
     <div id="color-palette-modal" class="modal">
         <div class="modal-content">

src/util/driver_delivery.py

@@ -18,6 +18,28 @@ def _split_serial_envelope(inner_json_str, peer_hex_list):
     return json.dumps(env, separators=(",", ":"))
 
 
+def _wifi_message_for_device(msg, device_name):
+    """
+    For Wi-Fi TCP fanout, narrow a v1 select map to a single device name.
+    Returns the original message when no narrowing applies.
+    """
+    if not device_name:
+        return msg
+    try:
+        body = json.loads(msg)
+    except Exception:
+        return msg
+    if not isinstance(body, dict):
+        return msg
+    select = body.get("select")
+    if not isinstance(select, dict):
+        return msg
+    if device_name not in select:
+        return msg
+    body["select"] = {device_name: select[device_name]}
+    return json.dumps(body, separators=(",", ":"))
+
+
 async def deliver_preset_broadcast_then_per_device(
     sender,
     chunk_messages,
@@ -129,7 +151,9 @@ async def deliver_json_messages(sender, messages, target_macs, devices_model, de
             if doc and doc.get("transport") == "wifi":
                 ip = doc.get("address")
                 if ip:
-                    wifi_tasks.append(send_json_line_to_ip(ip, msg))
+                    name = str(doc.get("name") or "").strip()
+                    wifi_msg = _wifi_message_for_device(msg, name)
+                    wifi_tasks.append(send_json_line_to_ip(ip, wifi_msg))
             else:
                 espnow_hex.append(mac)