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    VOXL2 Mini J10 UART

    Ask your questions right here!
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    • S
      Shaun Cosgrove
      last edited by 6 Dec 2023, 13:43

      After flashing the latest system image for the VOXL2 Mini (with no subsequent modifications apart from wifi setup), I cannot get the J10 Uart RX (sending to the mini) working. TX (sending from the mini) works as expected. Is there some configuration / parameter that I am missing or any suggested way to debug this? I will try a new mini board in case there is a hardware issue. Thanks!

      S 1 Reply Last reply 6 Dec 2023, 19:18 Reply Quote 0
      • S
        Shaun Cosgrove @Shaun Cosgrove
        last edited by 6 Dec 2023, 19:18

        Scoping the RX line, there is an 80mV p2p signal on the RX (to VOXL2 Mini) and a 3v3 on the TX.

        Is there a pull-down configured for the RX pin or some other configuration that could explain this? Is it possible to change this during runtime or will it require rebuilding the system image?

        S 1 Reply Last reply 7 Dec 2023, 21:51 Reply Quote 0
        • M
          modaltb ModalAI Team
          last edited by 7 Dec 2023, 19:59

          There's a directional level shifter on the RX pin, and it seems like our default state isn't what I have documented, and I need to investigate that!

          As temporary work around, you can set the pin state with onboard utility:

           voxl2-mini:/$ voxl-gpio -w 67 0
          

          For others, you can check loopback if you have it (between pins 4/5 of J10):

          voxl2-mini:/$ qrb5165io-uart-test -d 0
           [INFO]: success!
          

          Sorry for the confusion! We'll fix.

          S 1 Reply Last reply 7 Dec 2023, 22:01 Reply Quote 0
          • S
            Shaun Cosgrove @Shaun Cosgrove
            last edited by 7 Dec 2023, 21:51

            This post is deleted!
            1 Reply Last reply Reply Quote 0
            • S
              Steve Turner @modaltb
              last edited by 7 Dec 2023, 22:01

              @modaltb Thankyou so much for the quick eyes on this!
              We owe you some beers!

              1 Reply Last reply Reply Quote 0
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