feat(led-driver): wifi default transport, lazy espnow import, dynamic patterns

Made-with: Cursor

src/main.py

@@ -1,6 +1,5 @@
 from settings import Settings
 from machine import WDT
-from espnow import ESPNow
 import utime
 import network
 from presets import Presets
@@ -11,9 +10,14 @@ import select
 import socket
 import ubinascii
 from hello import discover_controller_udp
+try:
+    import uos as os
+except ImportError:
+    import os
 
 BROADCAST_MAC = b"\xff\xff\xff\xff\xff\xff"
 CONTROLLER_TCP_PORT = 8765
+controller_ip = None
 
 settings = Settings()
 print(settings)
@@ -50,6 +54,8 @@ def process_data(payload):
         apply_select(data)
     if "default" in data:
         apply_default(data)
+    if "manifest" in data:
+        apply_patterns_ota(data)
     if "save" in data and ("presets" in data or "default" in data):
         presets.save()
 
@@ -101,6 +107,144 @@ def apply_default(data):
         settings["default"] = default_name
 
 
+def _parse_http_url(url):
+    """Parse http://host[:port]/path into (host, port, path)."""
+    if not isinstance(url, str):
+        raise ValueError("url must be a string")
+    if not url.startswith("http://"):
+        raise ValueError("only http:// URLs are supported")
+    remainder = url[7:]
+    slash_idx = remainder.find("/")
+    if slash_idx == -1:
+        host_port = remainder
+        path = "/"
+    else:
+        host_port = remainder[:slash_idx]
+        path = remainder[slash_idx:]
+    if ":" in host_port:
+        host, port_s = host_port.rsplit(":", 1)
+        port = int(port_s)
+    else:
+        host = host_port
+        port = 80
+    if not host:
+        raise ValueError("missing host")
+    return host, port, path
+
+
+def _http_get_raw(url, timeout_s=10.0):
+    host, port, path = _parse_http_url(url)
+    req = (
+        "GET %s HTTP/1.1\r\nHost: %s\r\nConnection: close\r\n\r\n" % (path, host)
+    ).encode("utf-8")
+    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    try:
+        sock.settimeout(timeout_s)
+        sock.connect((host, int(port)))
+        sock.send(req)
+        data = b""
+        while True:
+            chunk = sock.recv(1024)
+            if not chunk:
+                break
+            data += chunk
+    finally:
+        try:
+            sock.close()
+        except Exception:
+            pass
+    sep = b"\r\n\r\n"
+    if sep not in data:
+        raise OSError("invalid HTTP response")
+    head, body = data.split(sep, 1)
+    status_line = head.split(b"\r\n", 1)[0]
+    if b" 200 " not in status_line:
+        raise OSError("HTTP status not OK: %s" % status_line.decode("utf-8"))
+    return body
+
+
+def _http_get_json(url, timeout_s=10.0):
+    body = _http_get_raw(url, timeout_s=timeout_s)
+    return json.loads(body.decode("utf-8"))
+
+
+def _http_get_text(url, timeout_s=10.0):
+    global controller_ip
+    # Support relative URLs from controller messages.
+    if isinstance(url, str) and url.startswith("/"):
+        if not controller_ip:
+            raise OSError("controller IP unavailable for relative URL")
+        url = "http://%s%s" % (controller_ip, url)
+    try:
+        body = _http_get_raw(url, timeout_s=timeout_s)
+        return body.decode("utf-8")
+    except Exception:
+        # Fallback for mDNS/unresolvable host: retry against current controller IP.
+        if not controller_ip or not isinstance(url, str) or not url.startswith("http://"):
+            raise
+        _host, _port, path = _parse_http_url(url)
+        fallback = "http://%s:%d%s" % (controller_ip, _port, path)
+        body = _http_get_raw(fallback, timeout_s=timeout_s)
+        return body.decode("utf-8")
+
+
+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 apply_patterns_ota(data):
+    manifest_payload = data.get("manifest")
+    if not manifest_payload:
+        return
+    try:
+        if isinstance(manifest_payload, dict):
+            manifest = manifest_payload
+        elif isinstance(manifest_payload, str):
+            manifest = _http_get_json(manifest_payload, timeout_s=20.0)
+        else:
+            print("patterns_ota: invalid manifest payload type")
+            return
+        files = manifest.get("files", [])
+        if not isinstance(files, list) or not files:
+            print("patterns_ota: no files in manifest")
+            return
+        try:
+            os.mkdir("patterns")
+        except OSError:
+            pass
+        updated = 0
+        for item in files:
+            if not isinstance(item, dict):
+                continue
+            name = item.get("name")
+            url = item.get("url")
+            inline_code = item.get("code")
+            if not _safe_pattern_filename(name):
+                continue
+            if isinstance(inline_code, str):
+                code = inline_code
+            elif isinstance(url, str):
+                code = _http_get_text(url, timeout_s=20.0)
+            else:
+                continue
+            with open("patterns/" + name, "w") as f:
+                f.write(code)
+            updated += 1
+        if updated > 0:
+            presets.reload_patterns()
+            print("patterns_ota: updated", updated, "pattern file(s)")
+        else:
+            print("patterns_ota: no valid files downloaded")
+    except Exception as e:
+        print("patterns_ota failed:", e)
+
+
 # --- TCP framing (bytes) → process_data -------------------------------------------
 
 
@@ -132,6 +276,8 @@ hello_payload = {
 hello_bytes = json.dumps(hello_payload).encode("utf-8")
 
 if settings["transport_type"] == "espnow":
+    from espnow import ESPNow  # import only in this branch (avoids load when using Wi-Fi)
+
     sta_if.disconnect()
     sta_if.config(channel=settings.get("wifi_channel", 1))
     e = ESPNow()