Hi, Any one knows what happens every 5 second? Running an interrupt based code in a resonance, it seem like the cpu does something every 5 seconds as this resonance stop. It is very visible when I lit a LED in a timer interrupt and turn it off in the main loop. Every 5 second it makes a short flash ...

Seems like the scope picture didn't got attached

Hi, I'm quite new to ESP32 and also not a pro programmer. Want to flip two pins due to an external interrupt, this works fine and have about 2µS reaction time from signal in to signal out. On the second I need that a timer have passed a certain level before action is done when entering the interrupt...