Cat Flap

Wow, that's really odd. Thanks for looking into this!

I wonder whether in that mode the data reported is somehow the difference in acceleration between that and the last event?

I guess what you could do is use the first motion event as a trigger to put the accelerometer back into continuous mode so you can get good readings - then after a second or two of inactivity you could drop back to the low power mode again.

I think you just need something like:

require("puckjsv2-accel-movement").on();

var idleTimeout;
Puck.on('accel',function(a) {
  // If cat door is not level, we're not idle
  if (a.acc.x < 15000 && idleTimeout) {
    clearTimeout(idleTimeout);
    idleTimeout = undefined;
  }
  
  if (!idleTimeout) { // first call
    LED.set();
    Puck.accelWr(0x0D,3); // INT1_CTRL - Gyro/accel data ready IRQ
    idleTimeout = setTimeout(function() {
      idleTimeout = undefined;
      Puck.accelWr(0x0D,0x00); // INT1_CTRL - disable - movement only
      LED.reset();
    },1000);
  }
  print(a.acc);
});