Pebble-ios packet counter differences

[mpetruska]

After some time the packet counters seem to be misaligned in the pebble and ios app.

[mpetruska]

The difference starts small, but grows with time linearly (in my approximation).
Setting the sampling frequency to 50Hz (from 100Hz) seems to reduce the effect to around half, so this seems to be directly affected by the number of data packets sent.

[mpetruska]

It seems appMessagesReceiveUpdateHandler(...) sometimes gets data packets duplicated. Logging the hashValue of the received samples confirms this.

[mpetruska]

After the quick patch (mpetruska@4912a59) , the counter seems to follow this formula exactly:

N(ios received) = N(pebble successful) + N(pebble timeout)
where N(x) means the number of packages for x.

It seems that in rare occasions pebble thinks a package is lost (does not receive ACK in time), but the iPhone app still receives the message successfully. However this occurs really rarely ( < 0.2% of packets in my observation).