A python program for controlling the onscreen menu on an Anybeam Up projector over its serial connection.

osd.py

import serial
import keyboard

def main():
    port = 'COM22'
    baudrate = 115200
    
    print('Y: toggle OSD')
    print('z: up')
    print('y: enter')
    print('x: down')

    try:
        ser = serial.Serial(port, baudrate, timeout=1)
    except serial.SerialException as e:
        print(f"Failed to connect: {e}")
        return

    try:
        while True:
            event = keyboard.read_event()
            if event.event_type == keyboard.KEY_DOWN:
                key = event.name

                if key == 'esc':
                    break

                if len(key) == 1:
                    char_byte = ord(key)
                    packet = [0xFF, ord('W'), ord('I'), char_byte]
                    checksum = (sum(packet)+1) % 256
                    packet.append(checksum)
                    ser.write(bytes(packet))

    finally:
        ser.close()

if __name__ == "__main__":
    main()