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tkinterraspberry-pigpio

UI and hardware Button

I want to call a function from a Switch(test) wired to the Raspberry. With the code posted below the function(asdf) is running when I click the Button on the UI. I deleted all the other stuff to make it look clear. But how can I call the (test) function when the GPIO get´s LOW?

import RPi.GPIO as GPIO
from tkinter import *
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(20,GPIO.IN)  # If Button is not pressed, Signal is HIGH
fenster = Tk()
fenster.geometry("100x100")


def test():
    if(GPIO.input(20)==False): 
        print("a")

def asdf():
    print("asdf")

b3=Button(fenster,text ="Referenzfahrt", command=asdf)
b3.config()
b3.pack(side="top")


fenster.mainloop()
Solution

  • I solved it:

    GPIO.add_event_detect(20, GPIO.RISING, callback=lambda x: test(), bouncetime=1000)

    With this line it calls the function when I press the Button