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  3. The Spektrum Cannot be binded, and QGroundcontrol “Detected 0 radio channels. To operate PX4 you need at least 5 channels”

The Spektrum Cannot be binded, and QGroundcontrol “Detected 0 radio channels. To operate PX4 you need at least 5 channels”

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  • D Offline
    D Offline
    DarkKnightCH
    Contributor
    wrote on last edited by
    #1

    Hello,I am using a Spektrum DX6i(the Modulation is DSM2, and there are 6 channels ), After configuring the IP address in the conf file and connecting to the m500 over QGroundControl, the QGroundcontrol says “Detected 0 radio channels. To operate PX4 you need at least 5 channels”. Does anyone know anything about this issue?

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    • modaltbM Offline
      modaltbM Offline
      modaltb
      ModalAI Team
      wrote on last edited by
      #2

      Sounds like you have the MAVLink over IP connection working from VOXL to GGC.

      The RC radio is a different 'band', some info here: https://docs.modalai.com/flight-core-radios/

      Basically you'll want to have a joystick transmitter and you 'bind' it (e.g. pair) together and can use it for RC control (manual flying, testing, etc.)

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      • D Offline
        D Offline
        DarkKnightCH
        Contributor
        wrote on last edited by
        #3

        Yes. You are right. There is connection between the VOXL and QGroundControl, Since in my QGroundControl I can see some IMU data of my quadcopter. But I also want to bind the spektrum RC radio transimitter and spektrum receiver, so I follow those step(RC radio setup) in your official website.!

        RC radio.png

        I tried to click the spektrum Bind and the QGroundControl will say "Detected 0 radio channels. To operate PX4 you need at least 5 channels", so what should I do to bind my spektrum RC radio transimitter and spektrum receiver?

        modaltbM 1 Reply Last reply
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        • D DarkKnightCH

          Yes. You are right. There is connection between the VOXL and QGroundControl, Since in my QGroundControl I can see some IMU data of my quadcopter. But I also want to bind the spektrum RC radio transimitter and spektrum receiver, so I follow those step(RC radio setup) in your official website.!

          RC radio.png

          I tried to click the spektrum Bind and the QGroundControl will say "Detected 0 radio channels. To operate PX4 you need at least 5 channels", so what should I do to bind my spektrum RC radio transimitter and spektrum receiver?

          modaltbM Offline
          modaltbM Offline
          modaltb
          ModalAI Team
          wrote on last edited by
          #4

          @DarkKnightCH ,

          Can you look at the receiver after pressing the button? Does it begin to flash an orange LED quickly?

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          • modaltbM Offline
            modaltbM Offline
            modaltb
            ModalAI Team
            wrote on last edited by
            #5

            Also, what transmitter make and model are you using?

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            • modaltbM modaltb

              @DarkKnightCH ,

              Can you look at the receiver after pressing the button? Does it begin to flash an orange LED quickly?

              D Offline
              D Offline
              DarkKnightCH
              Contributor
              wrote on last edited by
              #6

              @modaltb Sorry, I made a mistake. You are right, once I press the 'spektrum bind' button, the orange LED on receiver starts to flash. This actually means my receiver is already in the binding mode. But when I click the 'calibrate' button, the Qgroundcontrol will say “Detected 0 radio channels. To operate PX4 you need at least 5 channels”. The transmitter that I am using is Spektrum DX6i, do I need to setup something in my transmitter?

              modaltbM 1 Reply Last reply
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              • D DarkKnightCH

                @modaltb Sorry, I made a mistake. You are right, once I press the 'spektrum bind' button, the orange LED on receiver starts to flash. This actually means my receiver is already in the binding mode. But when I click the 'calibrate' button, the Qgroundcontrol will say “Detected 0 radio channels. To operate PX4 you need at least 5 channels”. The transmitter that I am using is Spektrum DX6i, do I need to setup something in my transmitter?

                modaltbM Offline
                modaltbM Offline
                modaltb
                ModalAI Team
                wrote on last edited by
                #7

                @DarkKnightCH
                I normally see this if I don’t reset the PX4 FW after binding. Did you try to power cycle the vehicle?

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                • modaltbM Offline
                  modaltbM Offline
                  modaltb
                  ModalAI Team
                  wrote on last edited by
                  #8

                  Also yes there's a binding procedure to connect the transmitter to the receiver. Normally you have to hold a button down whilst powering on the transmitter until you hear a beep or see the receiver go solid.

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                  • modaltbM modaltb

                    Also yes there's a binding procedure to connect the transmitter to the receiver. Normally you have to hold a button down whilst powering on the transmitter until you hear a beep or see the receiver go solid.

                    D Offline
                    D Offline
                    DarkKnightCH
                    Contributor
                    wrote on last edited by
                    #9

                    @modaltb Thank you so much. I followed your instruction and then reboot the quadcopter, then it works. But there is a new issue: When I calibrate the radio, the radio channels for roll, yaw and throttle looks good, but for pitch angle, it shows 'not mapped'. I checked Qgroundcontrol: 'Vehicle Setup->Parameter->Radio Calibration', RC_MAP_ROLL is channel1, the RC_MAP_PITCH is channel2, RC_MAP_THROTTLE is channel3 and RC_MAP_YAW is channel4.

                    Do you know what's wrong about the pitch radio channel mapping?

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                    • modaltbM Offline
                      modaltbM Offline
                      modaltb
                      ModalAI Team
                      wrote on last edited by
                      #10

                      Hi @DarkKnightCH ,

                      It's likely something you can setup in your transmitter, or perhaps reset the transmitter to default state. What make and model do you have?

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