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    M5CoreInk RTC doesn't wakeup when connected to USB

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    • B
      bsmorgan
      last edited by

      I have a modified version of the RTC_Clock example and it doesn't wakeup after an M5.shutdown(55) when it is connected to USB. If I disconnect the USB cable, the sketch works.

      The same behavior when I use the unmodified example. The RTC_Wakeup example also exhibits the same behavior.

      This makes it impossible to use Serial.print debug statements.

      Happy to include my modified sketch when I have the privileges to do so.

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      • felmueF
        felmue @bsmorgan
        last edited by

        Hello @bsmorgan

        well, M5CoreInk cannot shutdown in the first place when running from USB - see schematic here.

        A modified USB-C cable (with 5 V line cut) might help with debug statements in this case.

        Thanks
        Felix

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

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