#!/usr/bin/env python3
"""
ledtest.py  —  isolate the bridge's receive path from Godot.

Sends a single LED command straight to the bridge's command port, exactly like
Godot does. If the running bridge prints "cmd L1 ... -> serial" (and the LED
lights), the bridge's receive side is fine and any failure is on Godot's end.
If the bridge stays silent even for this, the problem is the bridge/binding.

Usage (with bridge.py already running):
    python ledtest.py L1     # turn LED on
    python ledtest.py L0     # turn LED off
"""

import socket
import sys

msg = (sys.argv[1] if len(sys.argv) > 1 else "L1").encode()
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.sendto(msg, ("127.0.0.1", 4243))
print(f"sent {msg!r} to 127.0.0.1:4243")