def find_lixada_port(self): """Auto-detect CP2102 or CH340 serial port.""" ports = serial.tools.list_ports.comports() for port in ports: # CP2102 or CH340 typically used in Lixada dongles if 'CP210' in port.description or 'CP210' in port.product or \ 'CH340' in port.description or 'CH34' in port.vid: return port.device # Fallback: any USB serial port (user confirms) if 'USB Serial' in port.description or 'UART' in port.description: print(f"Possible DMX port found: port.device - port.description") # Return first candidate return port.device return None
class LixadaDMX: """Controls Lixada USB DMX512 dongle on Windows 10.""" lixada usb dmx 512 driver windows 10
def set_channel(self, channel, value): """ Set DMX channel value. Args: channel: 1..512 value: 0..255 """ if channel < 1 or channel > self.DMX_CHANNELS: raise ValueError(f"Channel must be 1..self.DMX_CHANNELS") if value < 0 or value > 255: raise ValueError("Value must be 0..255") with self.lock: self.dmx_data[channel - 1] = value auto_find: Automatically detect the dongle
def __init__(self, com_port=None, auto_find=True): """ Args: com_port: e.g., 'COM3'. If None and auto_find=True, searches for CP2102/CH340. auto_find: Automatically detect the dongle. """ self.serial = None self.running = False self.dmx_data = bytearray([0] * self.DMX_CHANNELS) self.lock = threading.Lock() if auto_find and com_port is None: com_port = self.find_lixada_port() if com_port is None: raise RuntimeError("No Lixada DMX dongle found. Check USB connection.") self.com_port = com_port self._open_serial() 1 or channel >