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    "Bottom" IO expander pinout

    PRODUCTS
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    • M
      maxic62
      last edited by maxic62

      Hello everybody !

      I've ordered M5Stack Basic kit and I'm preparing my project.

      I'm not able to find any schematic / picture that describes the link between MBus to IO of the Bottom module

      Following Schematic:
      MBus have 30 pins with 20 GPIO
      0_1524591940602_MBus.png

      Following Bottom module picture:
      Bottom module come with 46 pins with 30 IO...
      0_1524592014196_Bottom pinout.jpg

      I can figure out connection for 5V, 3V3, GND, RST, BAT but for the other ???

      2 pins are named "DA". What does it mean ?
      "R0"/"T0": RX/TX from UART 1 ?
      "R2"/"T2": RX/TX from UART 2 ?
      "2" means GPIO2 ? So what "G2" means ?

      Anyone can help ? Do you have a document regarding that ?

      Many thanks for your help,
      Max

      1 Reply Last reply Reply Quote 0
      • reaper7R
        reaper7
        last edited by reaper7

        Names on the right side correspond to the GPIO numbers on the left and are connected together.

        higher DA mean GPIO25
        lower DA mean GPIO26

        R0/T0 = GPIO3/GPIO1 -> uart0
        R2/T2 = GPIO16/GPIO17 -> uart2

        Similarly, bottom names applies to the gpio numbers at the top.

        0_1524593532545_1524592015889-bottom-pinout.jpg

        MY GITHUB: https://github.com/reaper7/

        1 Reply Last reply Reply Quote 2
        • M
          maxic62
          last edited by

          Thanks you so much for your reply !
          So, right now I'm understanding that I will have half IO than expected...

          Thanks again, It helps me a lot
          See you

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