Wakeup via button press as well?

[pomplesiegel]

Hello! This is a great library and I have used it with great success on my SAMD21 chip (SAMD21G18A).

Question: Do you think it would be possible to have the device wakeup from its current sleep standbyMode() with a button press in addition to the normal RTC-based interval wakeup? I imagine this would mean attaching an interrupt to a behavior of an input pin (likely going from HIGH to LOW), and that triggering a device wakeup as well.

What are your thoughts on if / how this could be achieved with the current library?

Thank you! Michael

[pomplesiegel]

nvm, I see this works with the following example:

#include <RTCZero.h>

const byte button = 20; //SDA = PA22
bool ledIsOn = false;
volatile bool shouldBeSleeping = false;

RTCZero rtc;

void setup() {
  rtc.begin();
  pinMode(button, INPUT_PULLUP);
  Serial1.begin(115200);
  attachInterrupt(button, interr, LOW);
  Serial1.println("== Interrupt test ==");
}

void loop() {
  if (shouldBeSleeping) {
    Serial1.println("Now going to sleep");
    rtc.standbyMode();
  }
  digitalWrite(LED_BUILTIN, ledIsOn = !ledIsOn);
  delay(1000);
}

void interr() {
//   Serial1.println("Interruption triggered");
  shouldBeSleeping = !shouldBeSleeping;
}