Pull up circuit doesn't work? - Raspberry Pi Forums

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hi! tried pull circuit instructions link https://www.raspberrypi.org/learning/ph ... l_up_down/.
code this:

code: select all

import time import rpi.gpio gpio gpio.setmode(gpio.bcm) gpio.setwarnings(false)  button = 4  gpio.setup(pin, gpio.in, gpio.pud_up)  while true:   button_state = gpio.input(button)   if button_state == gpio.high:     print ("high")   else:     print ("low")   time.sleep(0.5)
when try run gives error: "pin" not defined
have tried sudo idle3 still doesn't work.
can figure out what's problem? :)

you're assigning pin number variable called "button" using undefined variable called "pin". in line below change pin button , should set:

code: select all

gpio.setup(pin, gpio.in, gpio.pud_up)


raspberrypi



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