I have a Python script which should read if a switch is pressed (a normal light switch).
This switch I've connected to GPIO pin 40 and GND
I read the state of GPIO:
GPIO_startprog1=20 GPIO.setFunction(GPIO_startprog1, GPIO.IN) if (GPIO.digitalRead(GPIO_startprog1) == GPIO.HIGH): print ("Prog 1 Start by press button") Prog1() def Prog1(): ...............
The moment I connect a wire to pin 38 (GPIO20) my readings are randomly flipping between high and low. Touching the wire with your fingers causes more
GPIO.HIGHs (I can monitor the state of the GPIO pins with a tool named WebIOPi).
What is the proper method to detect if a physical switch is on/off? I just need a clear and simple