Cat Flap

That's interesting - so even if you remove the setTimeout bit from Puck.on('accel',function(a) { and just have your original code, you're getting higher readings?

I just looked at the code and it seems that the movement example sets the accelerometer to the +/1 2g scale, where Espruino sets it to +/- 4g by default.

So basically just doubling your values should fix it for you?