@Modest-Polykarpovich said in [Resolved] How use select()/poll() with GPIO?: [...] Could you please send me 100% work your code? I see that you solved the problem already - cool! Bus just in case - my implementation is this one, which is part of a larger set of utilities handling other peripherals such as i2c, spi, pwm and a lot of other stuff, based on a common mainloop for timers and I/O polling.