I want to connect my Raspberry pi 4 to two Pixhawks such that when I'm using one other will be in sleep mode.

One way of doing it is by assigning address to an individual and then switching. But I'm not getting how to do it, or is there any other way I can do this.

Even a small guidance will help.

  • 2
    $\begingroup$ Do you mean to have one powered up but in 'reset'? Or do you want to remove power from one? I don't see any means of holding a PixHawk 4 in reset. $\endgroup$
    – Kevin
    Nov 15, 2021 at 14:11
  • $\begingroup$ I mean one will have have ardusub or ardurover firmware other will have ardupilot. When I'm in air I want to use ardupilot when I'm in water or land ardusub or ardu rover Such that when I'm using one other will go to sleep and it can switch to pix 2 from pix 1 and vice versa . The non usable puxhawk will be on standby $\endgroup$
    Nov 17, 2021 at 7:15
  • $\begingroup$ Welcome to the site! I've edited your question to attempt to clarify your exact issue. If any of the edits conflict with your intent, please feel free to edit to clarify. Also, you can take the tour to earn a badge, and visit the help center for more details on how to write a great question for this site. Thanks! $\endgroup$
    – anonymous2
    Nov 19, 2021 at 23:59

1 Answer 1


In Ardupilot there are parameters SYSID_THISMAV and SYSID_MYGCS that can be set to different values. This may only be helpful for MavLink. I have no experience with this so I am not sure if it would help with your plans.

One way to accomplish the switching would be to use a relay board and switch the power between the two PixHawk boards. Only one will be powered, so I am not sure that meets your definition of Standby.

I do see some other potential problems, especially if you want to share some resources like GPS, Receiver, etc. between the two PixHawk.


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