[Ivan Voras] shows how to use interrupts to service the ESP32 analog to digital converters when sampling sound. Interestingly, he uses the Arduino IDE mixed with native ESP-IDF APIs to get the ...

Conversely, the comparator output and the connection to the Arduino’s analog converter (A0 ... the code should run on a precise interrupt and equalize the time between outputs.

And that involves setting pins to ‘interrupt-on-change’ and getting the chip to ‘wake-on-interrupt’ – all stuff I could have done in assembler, but how to do in Arduino-speak ... but not the 150μA ADC ...

this method could be expanded to use additional hex switches and the other interrupts available on the Arduino Uno. The advantage of this approach is that it frees up analog-to-digital converters ...

A new fully featured Arduino development board has been created called the Prestissimo Uno+ which is now available to back via Kickstarter with earlybird pledges available from just $20 ...