I have a code that gets a one or a 0 from the user and will turn an LED on if 1, off if 0. It runs perfect when I run it in the Thonny IDE on the Pi itself. But when I try to run it through putty or even the Pi's terminal it will run everything except the if statements. (Does not print 'LED On/Off' or actually turn on or off the LED).

import RPi.GPIO as GPIO
import time

LEDPin = 17

def setup():
    GPIO.setmode(GPIO.BCM) #Set GPIO to BCM numbering
    GPIO.setup(LEDPin,GPIO.OUT,initial = GPIO.LOW)
    print('setup complete')

def main():
    while 1: #check for keyboard input
        KBInput = input('1 for LED On, 0 for LED Off: ')
        if KBInput == '1':
            print('LED On ')
        if KBInput == '0':
            print('LED Off ')

except KeyboardInterrupt:

1 Answer 1


I have figured it out. For some reason in the IDE the keyboard input is received as a string, where as in the terminal it is received as an int. So i just needed to make the line like the following to work on both. It will also work through Putty.

if KBInput == '1' or KBInput == 1:

  • This means, you used Python 2 in the Terminal. Thonny uses Python 3.
    – Aivar
    Mar 18, 2018 at 15:00
  • Is there a way to make sure it uses Python 3 in the terminal?
    – dka13
    Mar 18, 2018 at 17:35
  • 2
    How did you run the code in the terminal? The command python uses Python 2 and python3 uses Python 3.
    – Aivar
    Mar 18, 2018 at 17:54
  • Turned out @aivar's comment was the solution to my issue similar to the OP
    – frostshoxx
    Nov 14, 2019 at 4:22

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