DA14531 Reuse & Extended Use

[FloofyDwagon]

When we start using the DA14531 on a bee, we will flash to the OTP memory meaning we can no longer access the memory via the serial wire debug probe. Data will be retrieved from the tag via BLE - currently initiated via a GPIO-IR.

Following data retrieval we should reset the tag to be used again:

• End transmission.
• Reset variables.
• Restart receiving.
• Re-enable RTC-IR (if disabled to save power)?

Might be worth thinking about the system's representational power of time too: currently it's relative time to ms accuracy transmitted and stored in 3 bytes meaning up to ~4 hours of time can be represented... this is probably fine for now as the transmitter batteries will begin to die at a certain point. However, to represent actual time or longer periods of relative time another byte will be needed which is possible in the advertising address' 6th unused byte (this will result in additional storage burden on the DA14531 too).