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  • Thanks for all the info!

    is this for that board you mentioned a little while ago with a more-memory-heavy STM32 paired with an on-board ESP8266

    Yes, it's still very early days, but I'm working on a PCB now.

    please take into consideration the serving of pin CH_PD by one output pin

    Yes, absolutely.

    4K7 pull-up

    I doubt you really want this... When pulled down by the MCU it's using almost 1mA (3.3v / 4700 = 0.7mA) to fight against it :)

    @tve is there any reason for the resistor on GPIO15? I'm just trying to reduce component count :)

    Also, can CH_PD really act as reset? So I could just connect reset to 3.3v, and then use CH_PD with GPOI0 low to put the board into bootloader mode? It'd be nice to save an IO pin :)

    Switching regulator is a nice idea - any idea what the quiescent current of that one is? I'd like to keep the battery life as high as possible.

    P.S. I'm thinking of ditching the Battery + USB switchover FET. Just seems like extra trouble and I'm not sure anyone really uses it.

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