import serial
import time
import _thread

handle_serial = None
running = True


def rcv_data():
    while running is True:
        time.sleep(0.1)
        rcv = handle_serial.readall()
        print(rcv)


if __name__ == '__main__':
    serial_name = 'COM6'
    handle_serial = serial.Serial(serial_name, 57600, timeout=0.2, parity=serial.PARITY_NONE, stopbits=1)
    if handle_serial.isOpen():
        _thread.start_new_thread(rcv_data, ())
        send_data = None
        for i in range(0, 50):
            if i % 2 == 0:
                send_data = 'at+cfun=1'
            else:
                send_data = 'at+cfun=0'
            print(send_data)
            handle_serial.write(send_data.encode())
            time.sleep(2)
    running = False
    time.sleep(0.1)
    handle_serial.close()