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    doodle labs and joystick setup

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    • Jetson NanoJ
      Jetson Nano @Jetson Nano
      last edited by

      @Eric-Katzfey
      I tested what you asked me, since i am using external Fc and doodle labs, I am not able to assign AUX to any button, is there any work around on how to assign AUX

      Jetson NanoJ 1 Reply Last reply Reply Quote 0
      • Jetson NanoJ
        Jetson Nano @Jetson Nano
        last edited by

        @Eric-Katzfey @Alex-Kushleyev
        hey guys, just a random thought, can I enable turtle mode through a button instead of taking AUX 1 into consideration. just a thought, any guidance and help would be greatly appreciated.

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

          @Jetson-Nano What do you see if you go to the MAVLink console in QGC and look at the manual_control_setpoint topic? (listener manual_control_setpoint)?

          Eric KatzfeyE Jetson NanoJ 2 Replies Last reply Reply Quote 0
          • Eric KatzfeyE
            Eric Katzfey ModalAI Team @Eric Katzfey
            last edited by

            @Eric-Katzfey Also, there is a parameter called VOXL_ESC_T_ON. How is that set? It determines which button will be used for turtle mode. The code is here: https://github.com/modalai/px4-firmware/blob/ea098200d3c09b7af548bf7be29fda245fad8f17/src/modules/mavlink/mavlink_receiver.cpp#L2083

            Jetson NanoJ 2 Replies Last reply Reply Quote 0
            • Jetson NanoJ
              Jetson Nano @Eric Katzfey
              last edited by Jetson Nano

              @Eric-Katzfey
              This is the output i am getting while running listener manual_control_setpoint

              NuttShell (NSH) NuttX-11.0.0
              nsh> listener manual_control_setpoint
              
              TOPIC: manual_control_setpoint
               manual_control_setpoint
                  timestamp: 438754659 (0.033455 seconds ago)
                  timestamp_sample: 438754653 (6 us before timestamp)
                  roll: 0.00000
                  pitch: 0.00000
                  yaw: 0.00000
                  throttle: 0.00000
                  flaps: 0.00000
                  aux1: 0.00000
                  aux2: 0.00000
                  aux3: 0.00000
                  aux4: 0.00000
                  aux5: 0.00000
                  aux6: 0.00000
                  buttons: 0
                  valid: True
                  data_source: 2
                  sticks_moving: False
              
              nsh> listener manual_control_setpoint
              
              TOPIC: manual_control_setpoint
               manual_control_setpoint
                  timestamp: 446282690 (0.039850 seconds ago)
                  timestamp_sample: 446282683 (7 us before timestamp)
                  roll: 0.00000
                  pitch: 0.00000
                  yaw: 0.00000
                  throttle: 0.00000
                  flaps: 0.00000
                  aux1: 0.00000
                  aux2: 0.00000
                  aux3: 0.00000
                  aux4: 0.00000
                  aux5: 0.00000
                  aux6: 0.00000
                  buttons: 0
                  valid: True
                  data_source: 2
                  sticks_moving: False
              
              Eric KatzfeyE 1 Reply Last reply Reply Quote 0
              • Jetson NanoJ
                Jetson Nano @Eric Katzfey
                last edited by Jetson Nano

                @Eric-Katzfey I am not able to see the option you have mentioned VOXL_ESC_T_ON

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

                  @Jetson-Nano said in doodle labs and joystick setup:

                  I am not able to see the option you have mentioned VOXL_ESC_T_ON

                  In the Mavlink console what do you see with "param show VOXL_ESC_*"?

                  And what about "ver all"?

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

                    @Jetson-Nano said in doodle labs and joystick setup:

                    This is the output i am getting while running listener manual_control_setpoint

                    What is the parameter COM_RC_IN_MODE set to?

                    Jetson NanoJ 1 Reply Last reply Reply Quote 0
                    • Jetson NanoJ
                      Jetson Nano @Eric Katzfey
                      last edited by

                      @Eric-Katzfey COM_RC_IN_MODE is set to joystick only

                      1 Reply Last reply Reply Quote 0
                      • Jetson NanoJ
                        Jetson Nano @Eric Katzfey
                        last edited by Jetson Nano

                        @Eric-Katzfey Hey hope you are doing fine, I checked the code and various branches of PX4, I noticed I was able to see the parameter VOXL_ESC_T_ON but the option only showcased button 1 for assignment . what to do if I want to assign another button.

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

                          @Jetson-Nano You set that parameter to match the button you want to use.

                          Jetson NanoJ 1 Reply Last reply Reply Quote 0
                          • Jetson NanoJ
                            Jetson Nano @Eric Katzfey
                            last edited by

                            @Eric-Katzfey Thank you for reverting back, The options only show one option button 1. I tested with button one but the drone was not taking in the command for enabling the turtle mode.
                            I want to know whether the code was tested out, so that I can be sure about not missing out on any parameter or setup

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

                              @Jetson-Nano It's a parameter that you can set to any number you want. In QGC you can look at the joysticks tab and see as you press each button which number it is. Then set the parameter to that number.

                              Jetson NanoJ 1 Reply Last reply Reply Quote 0
                              • Jetson NanoJ
                                Jetson Nano @Eric Katzfey
                                last edited by

                                @Eric-Katzfey I am not able to setup multiple buttons, it is only showing one option of button 1.
                                Also after assigning the button one and trying to enable and use turtle mode, it is not working.
                                Is there any particular version of px4 that this works with.
                                My setup is VOXL 2 ---> TELEM 1 --> Flight core v2 --> TELEM 2 --> FPV ESC
                                In normal setup the motors are working and rotating, but when I try to keep the drone upside down and enable the turtle mode , the QGC is still showing not ready message. Also I am not able to ARM because of this.
                                Is there anything I am missing out?

                                Jetson NanoJ 1 Reply Last reply Reply Quote 0
                                • Jetson NanoJ
                                  Jetson Nano @Jetson Nano
                                  last edited by

                                  @Eric-Katzfey could you please help me out here

                                  Eric KatzfeyE 2 Replies Last reply Reply Quote 0
                                  • Eric KatzfeyE
                                    Eric Katzfey ModalAI Team @Jetson Nano
                                    last edited by Eric Katzfey

                                    @Jetson-Nano Let's try to walk through this and see where it is going wrong. Please provide answers to all of the following questions. Go to the joystick tab in QGC and press the button on the joystick that you want to use for turtle mode. Which number lights up when you press the button? Next, go to the MAVLink console and provide the output of these commands: ver all, listener manual_control_setpoint, param show VOXL_ESC_MODE, param show VOXL_ESC_T_ON, and param show COM_RC_IN_MODE. If VOXL_ESC_T_ON is not set to the number of the button you just discovered on the joystick tab then change it to the value you want. For example, by default VOXL_ESC_T_ON is set to 9. If you want to use button 10 instead then do param set VOXL_ESC_T_ON 10. If you had to change that parameter then reboot and verify that it is now set correctly. You should see the aux1 value in manual_control_setpoint change from 0.0 to 1.0 when you press the button that you have chosen. Can you verify that you are seeing that?

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

                                      @Jetson-Nano If all that seems to be working then press the turtle button and arm (with drone right side up, not upside down) and verify that with turtle mode enabled the propellers are spinning in the opposite direction and the drone won't lift off. Of course, you must be extremely careful when running this test!!! Make sure that the drone is in a location where it cannot cause damage or injure someone if it goes out of control. It would be best to completely remove the propellers and just verify that the motors are spinning in the opposite direction of normal flight.

                                      Jetson NanoJ 1 Reply Last reply Reply Quote 0
                                      • Jetson NanoJ
                                        Jetson Nano @Eric Katzfey
                                        last edited by Jetson Nano

                                        @Eric-Katzfey
                                        I followed the steps you suggested, i am attaching the Screenshots. I tried what you suggested the result is still the same, I am not able to arm the system. I tried with various options for VOXL_ESC_MODE, still the same.

                                        Screenshot from 2025-08-14 14-29-56.png

                                        I clicked the assigned button here, AUX 1 values are changing but only when i keep the voxl_ESC_MODE to UART passthorugh

                                        Screenshot from 2025-08-14 14-30-08.png

                                        Screenshot from 2025-08-14 14-19-46.png

                                        Screenshot from 2025-08-14 14-19-43.png

                                        Screenshot from 2025-08-14 14-36-35.png

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

                                          @Jetson-Nano Here are the steps I am using for testing. Here are my VOXL_ESC parameters:
                                          6d7b7752-038a-4078-8455-ce8b3f4e46dc-image.png
                                          My VOXL_ESC_BAUD is set non-standard because I am using an ESC simulator. I have flight mode set to altitude mode. If I check the ESC commands I see no output:
                                          c4703501-1b3d-4d39-aeec-43e3e5cf3c10-image.png
                                          Then I arm and check ESC commands and see values:
                                          ecde7a30-8903-4116-819c-abd998b4d8b1-image.png
                                          Then I disarm, press button 9, arm, move both sticks around and see these ESC commands:
                                          c0b19cce-bed1-4358-96c8-87595e4dd924-image.png
                                          Notice that most motors are 0 except for 1 or 2 and are of opposite sign than normal. In this case pitch was centered and roll was full right. Hope this helps.

                                          Jetson NanoJ 2 Replies Last reply Reply Quote 0
                                          • Jetson NanoJ
                                            Jetson Nano @Eric Katzfey
                                            last edited by

                                            @Eric-Katzfey
                                            Thank you for reverting back, I will check these out and get back to you. Also I will flash the FC once more and see if I have any luck.
                                            I would like to know which is the version of PX4 you are using.

                                            Eric KatzfeyE 1 Reply Last reply Reply Quote 0
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