import serial
import RPi.GPIO as GPIO
import time
 
ser=serial.Serial("/dev/ttyACM0",9600)  #change ACM number as found from ls /dev/tty/ACM*
ser.baudrate=9600
def blink(pin):
    
    
    GPIO.output(pin,GPIO.HIGH)  
    time.sleep(1)  
    GPIO.output(pin,GPIO.LOW)  
    time.sleep(1)  
    return
 
GPIO.setmode(GPIO.BOARD)
GPIO.setup(11, GPIO.OUT)
while True:
    
    read_ser=ser.readline()
    print(read_ser)
    if(read_ser=="Hello From Arduino!"):
        blink(11)