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    how does the M5SticC-Plus2 charge its battery?

    M5 Stick/StickC
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    • W
      wjcarpenter
      last edited by

      I am curious about this. I see from the documentation that the P2 removed the AXP192 power management chip that previous sticks have. (And also, alas, the APIs for knowing if the device is plugged in and whether it's charging, but that's not my question.)

      My question is, how is the charging of the battery managed? I tried figuring it out from the schematic on that documentation page, but I came away still wondering. I figured out from noodling around that the measurement of the battery voltage still works on the P2, so I guess that's part of it. But managing the charging of a lithium ion battery seems kind of complicated.

      Is the P2 going to catch fire in my hand someday? :-)

      felmueF 1 Reply Last reply Reply Quote 0
      • felmueF
        felmue @wjcarpenter
        last edited by

        Hello @wjcarpenter

        the battery charging IC is TP4057 and battery voltage is measured via R40 / R41 into GPI38. See second page of the schematics here.

        Thanks
        Felix

        GPIO translation table M5Stack / M5Core2
        Information about various M5Stack products.
        Code examples

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