Is there any way of downloading history that doesn’t require interpreting a rapid blast of BLE characteristic updates? It seems like the BLE host devices I’m targeting can’t handle the rate of the dump.
Okay, maybe if I do less in the event handler of my host, I can receive them all. So perhaps never mind about this question. But now I have a new question 
- When does a tag clear its internal measurement history?
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Internal history is cleared when tag is powered off and on again, because the timestamps are lost.
Otherwise there is a rolling buffer that does not get cleared, it has ~13-14 days of history in total
I observe it clearing sometimes when I download the history. But the battery on my tag is pretty flat.
It’s possible that 2-way radio traffic is too heavy for a worn battery, causing a reboot and clearing of history