Just created my first ABP device in ChirpStack… After several hours of looking through my software I finally tried (re)activate just created/activated device and chirpstack started to send messages to it.
How do I know when (re)activation is needed and how to do it through API? Just repeat …/activate call with same data?
This really depends on the device implementation. Ideally once activated, the device should persist its state (periodically) such that a power-cycle the device does not reset its frame-counters.
If the device resets is frame-counters, then you need to call the activate endpoint with the same session-keys, but frame-counters set to