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    Communication through J18

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    • Filip SlezakF
      Filip Slezak @Eric Katzfey
      last edited by

      @Eric-Katzfey Hi Eric, thanks for pointing this out. How would you go about establishing a serial communication with a Teensy or other microcontroller then?

      Eric KatzfeyE 1 Reply Last reply Reply Quote 1
      • D
        dougmiller
        last edited by

        I have the same question, but for the VOXL 2 Mini. How to access the HS-UART, and whether it can support oddball baud rates (1012kbps or something like that.)

        Eric KatzfeyE 1 Reply Last reply Reply Quote 0
        • Eric KatzfeyE
          Eric Katzfey ModalAI Team @Filip Slezak
          last edited by

          @Filip-Slezak This add-on board will expose a UART that is accessible from the applications processor: https://www.modalai.com/collections/voxl-add-ons/products/m0125?variant=40740708876339

          Filip SlezakF 1 Reply Last reply Reply Quote 0
          • Eric KatzfeyE
            Eric Katzfey ModalAI Team @dougmiller
            last edited by

            @dougmiller Can you please open a new topic on the forum with this question? (I believe it may be possible to use J10)

            1 Reply Last reply Reply Quote 0
            • Filip SlezakF
              Filip Slezak @Eric Katzfey
              last edited by

              @Eric-Katzfey Hey, we already have this board on https://www.modalai.com/collections/expansion-board/products/m0078 - would that work?

              (and the PWM breakout board https://www.modalai.com/products/flight-core-pwm-output-cable-and-break-out-board)

              Eric KatzfeyE 1 Reply Last reply Reply Quote 0
              • Eric KatzfeyE
                Eric Katzfey ModalAI Team @Filip Slezak
                last edited by

                @Filip-Slezak The VOXL2 mini does not have the expansion connectors to use the add on boards.

                Filip Slezak 0F 1 Reply Last reply Reply Quote 0
                • Filip Slezak 0F
                  Filip Slezak 0 @Eric Katzfey
                  last edited by

                  @Eric-Katzfey Hey, I have to reply from another account because the email system for confirmation doesn't work (fyi)

                  We have the bigger standard Voxl2, not mini.

                  Eric KatzfeyE 1 Reply Last reply Reply Quote 0
                  • Eric KatzfeyE
                    Eric Katzfey ModalAI Team @Filip Slezak 0
                    last edited by

                    @Filip-Slezak-0 Oh, sorry, got confused by your VOXL2 mini question. That m0078 board only gives you USB, not a UART. And that other link goes to some PWM breakout board for flight core. Not sure how that one fits in with VOXL2 at all.

                    Filip Slezak 0F 1 Reply Last reply Reply Quote 0
                    • Filip Slezak 0F
                      Filip Slezak 0 @Eric Katzfey
                      last edited by

                      @Eric-Katzfey No worries, and yes that's it. How would you recommend I communicate with that external Teensy board? Can't seem to find easily accessible pins for that.

                      Eric KatzfeyE 1 Reply Last reply Reply Quote 0
                      • Eric KatzfeyE
                        Eric Katzfey ModalAI Team @Filip Slezak 0
                        last edited by

                        @Filip-Slezak-0 I would go with that expansion board I pointed out and use UART.

                        Filip Slezak 0F 1 Reply Last reply Reply Quote 0
                        • Filip Slezak 0F
                          Filip Slezak 0 @Eric Katzfey
                          last edited by

                          @Eric-Katzfey Sorry for the late reply. Unfortunately, I don't see how that could work for us, we already have the m0078 on there and the J2 goes to the wifi dongle, what am I missing in what you're suggesting?

                          Eric KatzfeyE 1 Reply Last reply Reply Quote 0
                          • Eric KatzfeyE
                            Eric Katzfey ModalAI Team @Filip Slezak 0
                            last edited by

                            @Filip-Slezak-0 The board I am suggesting has USB and UART.

                            Filip Slezak 0F 1 Reply Last reply Reply Quote 0
                            • Filip Slezak 0F
                              Filip Slezak 0 @Eric Katzfey
                              last edited by

                              @Eric-Katzfey So you're thinking switch out the boards, use the UART for the wifi dongle and communicate over USB with the microcontroller?

                              Eric KatzfeyE 1 Reply Last reply Reply Quote 0
                              • Eric KatzfeyE
                                Eric Katzfey ModalAI Team @Filip Slezak 0
                                last edited by

                                @Filip-Slezak-0 No, keep using USB for the WiFi dongle and use the UART to communicate with the Teensy.

                                Filip Slezak 0F 1 Reply Last reply Reply Quote 0
                                • Filip Slezak 0F
                                  Filip Slezak 0 @Eric Katzfey
                                  last edited by

                                  @Eric-Katzfey Got it, this is getting clearer. Is it safe to use the Teensy's 3.3V pins? According to this, the Voxl2 comm pins are at 1.8V even though its GPIOs are at 3.3V https://docs.modalai.com/voxl2-linux-user-guide/#devttyhs1---b2b-connector-uart

                                  Eric KatzfeyE 1 Reply Last reply Reply Quote 0
                                  • Eric KatzfeyE
                                    Eric Katzfey ModalAI Team @Filip Slezak 0
                                    last edited by

                                    @Filip-Slezak-0 Yes, should be fine. We use that UART to connect with our external flight core boards that have 3.3V rx / tx.

                                    Filip Slezak 0F 1 Reply Last reply Reply Quote 0
                                    • Filip Slezak 0F
                                      Filip Slezak 0 @Eric Katzfey
                                      last edited by

                                      @Eric-Katzfey Thanks Eric, got it working easily after that using a classic pyserial script. Great help!

                                      1 Reply Last reply Reply Quote 0
                                      • Filip Slezak 0F
                                        Filip Slezak 0
                                        last edited by

                                        @Eric-Katzfey Hi again, can we expose another UART port for programming on the Voxl2?

                                        Filip Slezak 0F 1 Reply Last reply Reply Quote 0
                                        • Filip Slezak 0F
                                          Filip Slezak 0 @Filip Slezak 0
                                          last edited by

                                          @Filip-Slezak-0 Thinking about ttyHS2 or ttyHS3 maybe shown here https://docs.modalai.com/voxl2-linux-user-guide/#uarts

                                          modaltbM 1 Reply Last reply Reply Quote 0
                                          • modaltbM
                                            modaltb ModalAI Team @Filip Slezak 0
                                            last edited by

                                            @Filip-Slezak-0 please see here: https://docs.modalai.com/voxl2-linux-user-guide/#apps-proc, we have ttySH2/ttyHS3 routed to the B2B connectors, but you need a carrier board to pick them up...

                                            For example, ttyHS2 goes to our M0090 - 5G Add-On Board J9 Pins 2/3 (Tx/Rx)

                                            9f1f7f3b-71fb-44c2-a032-f2bd1acb538a-image.png

                                            Filip Slezak 0F 1 Reply Last reply Reply Quote 0
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