Trigger Camera doesn't work due to low signal output

PX4 Autopilot
1

I’m having trouble with the camera trigger function by pixhawk (PX4 and cube orange).

The parameters related to the trigger camera in the mission planner are set as follows.
CAM_SERVO_OFF 1100 PWM
CAM_SERVO_ON 1900 PWM
CAM_TRIGG_TYPE 0: Servo
SERVO14_FUNCTION 10: Camera trigger

And, the wiring situation is as shown in the picture. The power of servo rail is supplied from the FUTABA radio receiver (4.6V).

Nothing happens when I do a camera trigger on the mission planner screen.
When I checked the condition of the servo rail, the signal pin of servo 14 showed 0.17V in normal condition. If I press the camera trigger button on the mission planner screen, the signal pin responds, but the voltage only rises to 0.31V. I remember that the signal pin voltage rose to about 3.3V when the camera trigger was successful in the past. I don’t understand why the camera trigger is no longer working. Can anyone give me some advice where is the problem?

pixhawkwiring
pixhawkwiring1920×1086 263 KB

Best regards,
Tatsuya

2

This parameter doesn’t exist in PX4, as far as I can see. Could it be that you’re using ArduPilot and not PX4? If so, I would ask over in there forum: discuss.ardupilot.org.

3

I’m sorry.
I should have posted this question on the ArduPilot discussion. I will post this question myself on the ardupilot discussion.
Thank you！