Set the GPIO back to mode ALT0 to switch it back to UART mode.
I know pigs will do this. http://abyz.me.uk/rpi/pigpio/pigs.html#M/MODES
I'm fairly sure wiringPi's gpio utility lets you select the GPIO modes as well.
That does a reasonable job of explaining the set-up. However it provides no information on how to actually read the inputs after it has been set-up.The Traveler wrote: ↑Thu Jul 26, 2018 4:18 pmhttps://github.com/raspberrypi/firmware ... t/overlays
Read the README. It's all there.