How to get lowest consumption possible (MDBT42Q bare)?

[espruino-discuss]

Posted at 2023-10-31 by DanDyse

I just want the device to advertise like here ... working as an "AirTag". From what I understand this code not really loops it just sets the device in advertising mode. How much will it consume? Is there something I can disable to even lower the consumption?

[espruino-discuss]

Posted at 2023-10-31 by @fanoush

https://www.espruino.com/MDBT42Q#power-consumption
https://www.espruino.com/Puck.js#power-consumption
Advertising, 2000ms 0dBm (nonconnectable, nonscannable) - under 10uA

If you make it nonconnectable, nonscannable then make sure you have some recovery method to connect to it to change code, holding BTN1 for >3 seconds at power on should skip any code starting automatically from flash

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Posted at 2023-10-31 by DanDyse

Thank you @fanoush!

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Posted at 2023-11-05 by DanDyse

When I use setTimeout to regularly change the BLE advertising (once a day or so), it will surely increase power consumption a bit. But will it lead to the interpreter running permanently wasting power or will it use (deep)sleep to minimise consumption? I have read here that nRF52 boards sleep automatically ...?

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Posted at 2023-11-06 by @gfwilliams

Yes, it'll just sleep automatically - if you change advertising data even once a minute, the increased power usage is pretty negligible so I wouldn't worry about it.

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Posted at 2023-11-06 by DanDyse

Thank you!