RPi.GPIO for LED, Push Button, Relay Module

[rern]

[dunghnguyen]

Thanks @rern for the tutorial. I can learn a bit from this. Let me to see if I can manage time to create some scripts running on Rpi0 to control RPi2 / Rune [WINKING FACE]

I hope even I can create the RPi that it controls itself when pressing the button . In this case, can you advise if we can use another pin for pin 40 instead since we often pin 40 as the DAT of i2s connection to external DAC?

[rern]

Of course you can use any pin+ground pairs except 3.3V and 5V power supply pins.

[dunghnguyen]