les2_3_py

#!/usr/bin/env python3
import serial
import time
if __name__ == '__main__':
    ser = serial.Serial('/dev/ttyACM0',9600, timeout=1)
    ser.flush()
while True:
    ser.write(b"Hello from Raspberr Pi!\n")
    line = ser.readline().decode('utf-8').rstrip()
    print(line)
    time.sleep(1)