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  • @Gordon,
    Thank for your answer.
    About power saving, I suggest to use an ultra low quiescent current power regulator. I mean nA not ten's of nA.
    I am biaised toward 1 year autonomy on a pair of AA batteries and now considering Stm32l476 mcu. I would suggest to have a look at it's integrated capability to charge a super capacitor. Just to go on dreaming, power it from a cheap 1,5v solar panel such as those found in solar powered garden lights.
    May be that could be an optionnal shield, part of a new Kickstarter campain and, somewhere retrofit the Pico with it too...


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