I have been delving (groping blindfold, more accurately) into the Arduino compiler adaptation code to try to determine how it handles the switch-over between its pwm activities, its set-I/O-to-output ...

The project started by searching for a vintage rotary phone at thrift stores. I originally had in mind a classic 50-70s style or french style phone, but then came across this very old wooden box phone ...

I've been trying to get the timer interrupt for the esp32 s2 working with the repeated timer example but it seems like that the esp32S2 is not going into the interrupts. This code uses native arduino ...