Problem with Actuator slider test in QGC with the Version 1.14.3

PX4 Autopilot
1

Hello,

I’m trying to connect my single copter with a Cube Orange Plus to QGC. When I try and do it on the version 1.15.4, and select a random airframe like Standard plane. The actuator test slider in the QGC work fine and I’m able to move my actuators, which is my main goal at this point.

But the problem is that I need to use the version 1.14.3, and when I repeat the same procedure for that version, nothing seems to work and it seems like cube is not getting any input or anything and my actuators don’t move at all as they are probably not getting any signal.

Can someone guide please? I’m using PWM servos and not UAVCAN ones.

1 Like
2

We are currently experiencing the similar issue with PX4 Autopilot Firmware version 1.14.3. We specifically require this version due to its compatibility with the MATLAB PX4 Autopilot Toolbox. However, we have encountered a critical problem: after successful arming, the motors do not respond to throttle, pitch, roll, or yaw commands.

We have confirmed this issue in two different setups:

  1. When sending commands via the MATLAB PX4 Autopilot Toolbox.
  2. When directly transmitting signals through a radio control unit.

In both cases, the system arms correctly, but none of the motor outputs activate in response to control inputs.
I should also note that we are using the Pixhawk Orange+ Autopilot, and when we use QGroundControl with firmware version 1.15.4 (following the same procedure), the motors operate correctly with the radio control.

3

Have you connected your motors with the main IO pins or the aux pins? Because for me connecting them with the AUX channel worked. What I figured that the parameter PWM_MAIN_TIM which is kind of the update rate isn’t working for the version 1.14.3 (Although in PX4’s documentation it says that this parameter should be there in this version as well but it isn’t somehow). But the parameter PWM_AUX_TIM is there in 1.14.3 so servos get the update rate frequency signal, hence they work with the aux pins. So I would recommend connecting to the aux pins and see if works or not.

1 Like
4

Thank you for your reply. I had connected them to the main I/O. Based on your recommendation, I will try using the AUX ports and hope they are compatible with the MATLAB PX4 Autopilot Toolbox as well.

5

I used AUX instead of MAIN, but the problem remained. Did you change any parameters manually, or did you only change the wiring? Also, I’d like to know if you used QGroundControl.
I’d like to mention that when I connect the motors to AUX and use the latest version of PX4-Autopilot, everything works fine without any changes. However, in version 1.14.3, the motors do not receive any commands.
Thank you

6

I didn’t change any wiring or anything. In QGC, when you to to the parameters list can u find the parameters PWM_main_tim0 or PWM_Aux_tim0 etc? If you can’t, then it could be an issue.

Another thing to note is that I have tried the same setup with cube orange instead of cube orange plus and now even the main pinouts work fine for me. So it could be an issue of the support of the version 1.14.3 with cube orange plus.