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  • #if CONFIG_HAL_BOARD == HAL_BOARD_APM1
    #define RELAY_PIN 47
    #elif CONFIG_HAL_BOARD == HAL_BOARD_APM2 || CONFIG_HAL_BOARD == HAL_BOARD_AVR_SITL
    #define RELAY_PIN 13

    • Hi Zheng, I could see some hope fixing my issue after reading your post. I am using ardupilot 2.5 for plane. I have a camera and wanted to control its power via relay using ardupilot (A9) from mission planner. The relay circuit is ready and has two pins out +5V power and GND.

      Can you tell me in steps how to connect relay and which button control it from mission planner? 

      I want to control this relay any time I want (even while in ground) not specifically during waypoint navigation. 

  • Im asking for the same!!! Check A9 pins. between S and - u will have 0 or 5 volts when relay test is performed from terminal screen but doesnt work on a normal Do Set Relay command in a mission.!! I dont know why!

    Can Someone help us please?

    Thanks!

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