btheadset.py

import bluetooth


def main(uuid):
    # port = find_port(uuid)
    port = 11

    sock = bluetooth.BluetoothSocket(bluetooth.RFCOMM)
    sock.connect((uuid, port))

    response = sock.recv(128)
    # print(response) # AT+VGS=10\r
    sock.send(b"\r\nOK\r\n")

    response = sock.recv(128)
    # print(response) # AT+XAPL=0000-0000-0100,7\r
    sock.send(b"\r\n+XAPL: Android,9\r\n")
    sock.send(b"\r\nOK\r\n")
    
    response = sock.recv(128)
    # print(response) # \nAT+IPHONEACCEV=2,1,8,2,0\r
    _num_pairs, *pairs = response.strip().split(b"=")[-1].split(b",")
    pairs = [tuple(pairs[i:i+2]) for i in range(0, len(pairs), 2)]
    for k,v in pairs:
        if k == b"1":
            print("Battery Level:", battery_percent(v))
        elif k == b"2":
            print("Dock state:", v)
        else:
            print("Unknown key:", k, v)

def battery_percent(val):
    return f"{(int(val) + 1) * 10}%"

def find_port(dev):
    # Handsfree Service UUID
    uuid = "0000111e-0000-1000-8000-00805f9b34fb"
    proto = bluetooth.find_service(address = dev, uuid = uuid)
    if len(proto) == 0:
        print("couldn't find service port")
        exit()
    else:
        return proto[0]["port"]


if __name__ == "__main__":
    from sys import argv

    main(argv[1])