Blink LED on Raspberry Pi 3 with Python and BCM Pins

March 25th, 2019 User Icon

Nilesh Chaurasia

Blink LED on Raspberry Pi 3 with Python and BCM Pins setup. This tutorial provide step by step instruction to perform LED Interfacing with Raspberry Pi and its Python program. In this example we are using BCM setup for pin assignment.

import time
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(17,GPIO.OUT)
while True:
    print("LED ON")
    GPIO.output(17,True)
    time.sleep(1)
    print("LED OFF")
    GPIO.output(17,False)
    time.sleep(1)

Note: You have to connect your LED on pin number 11 on GPIO. Actually when you setup in BCM mode the pin numbers are from chip. The board pin and chip pin have different number assignments. It is better to use setup as BOARD, to make easy connection with the GPIO header on Raspberry Pi.