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    Best posts made by tatar-andrei

    • M5Paper EPD power consumption

      Hi guys,

      Just got my M5Paper these days and was playing with it, measuring the power consumption, figuring out the best way to approach writing a low power application for it. I really love the form factor and the capabilities. Figured out how to send esp32 in deep sleep and wake it via touch gestures (using doze mode).

      I disconnected the internal battery and connected a lab power supply (4.2V) and tested the calculator app (while idling - no touch events, no screen updates)

      • 169 mA - with the default app
      • 93 mA - with EPD power disabled

      My question is: why does the EPD consume so much power (almost half!) while the screen is idle? I was expecting it to be close to nothing.
      Do I have a defective unit? Or can this be optimized in the EPD driver?

      posted in Cores
      T
      tatar-andrei