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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@DFox
It happens when I'm connected via the IDE and without - doesn't seem to make a difference. I had already tried various connection intervals, but the Core says it wants between 7.5 and 100 ms, and also longer intervals just seemed to make it ultimately take even longer to reconnect because I found I had to adjust the checkConnectivity interval up to account for the longer timeouts. I have tried a couple 2021-Q1's and a 2022-Q4 Core. It doesn't seem to make a difference.
But I did notice that the 2022-Q4 Cores support multiple connections. So I tried the following with 2 Bangles: I set one up with the latest firmware and standard power (0 presumably), and the other was using 2v19.10 (the version I'd been using before) and TxPower 8. Both connected to the same HRM and Core. I ran it a few nights and the higher power one was noticeably better overall. The new fw might have helped a bit too, but it's difficult to tell with the data I've collected so far. I will make both changes going forward, though. I wouldn't have thought the power level would make that much difference, the range is less than 1 meter at all times since I'm wearing both devices. The pucks were in another room and still read pretty well. So thanks for the suggestion!