Greengoose looks interesting, but I've just read every page I could find on their site (3 mins?) and still don't understand exactly what the 'sensors' are and what they can 'sense'.
How does a sensors tell if I've fed the dog today?
Pretty sure the sensor detections motion above a threshold. So basically "the food bag was moved 45 degrees" is the trigger. That should kick off a 915Mhz analog pulse.
It's not a digital stack IIRC, which is why the battery is so small and circuit is like a dollar total.
How does a sensors tell if I've fed the dog today?