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Using a Pixhawk 2.4.8 as the Autopilot

Hi there! We are currently on the process of collecting the electronics for our drone and we are quite new into building ROVs with ArduSub as well. We have seen from the documentations that the recommended board was the Pixhawk 1. However, we currently could only get a hold of a Pixhawk 2.4.8 from an online store which is more accessible to us. We have also checked the details for each of the boards and it looks like they have the same specifications installed. A previous thread also stated that it is possible, but the 2.4.6 is much more preferred. We would like to know in a little more detail if we could use this board since we really have little knowledge on the firmware and this electronic component in general. Any answers are highly appreciated. Thanks!

It’s hard for us to answer this beyond what’s already been said elsewhere on the forum. ArduSub should technically run on it, but the components are generally lower quality and the 2.4.8 is known for being somewhat troublesome to work with.

If you’re willing to take the risk of a board that’s known for having low quality then that’s your decision to make. Alternatively it should work to use the Pixhawk 2.4.6, or the Pixhawk 4, which should both be higher quality.

This previous response is relevant for understanding the context:

Unfortunately our alternative board is currently in its validation phase, so isn’t yet ready for public release. I believe it’s expected to release towards the end of the next few months, but I’m assuming you need an autopilot board before then.

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Thanks for this.

I see. We’ll check the responses of other people and look at their experiences with this Pixhawk version.

It’s really unfortunate that we won’t have the time to wait for the next board. We’ll see what we can do with the information you provided. As always, thanks so much!

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Hi, Eliot. I have checked some forum posts and it seems like the general consensus is that the 2.4.8 is simply as you said:

As a follow up, I would like to know if the 2.4.6 version that you’re referring to would be something like this? I have tried to search for the term Holybro in the forums but I haven’t seen anything of this make. If that version of 2.4.6 is compatible, I guess that we could steer into that direction since we have seen another source that could provide us with the board.

Honestly I’m not sure. I believe 2.4.8 is actually Pixhawk1 v2.4.8, as discussed here:

I would assume then that 2.4.6 should be Pixhawk1 v2.4.6, but the link you provided says it’s also known as the Pixhawk2. That being said, the whole Pixhawk numbering scheme is/was something of a mess, so it’s possible that they’re the same thing. Given BR staff on the forum have previously said that the 2.4.6 should work then I would expect that to be the case.

At the moment using the Pixhawk 4 requires using the development version of ArduSub. If the 2.4.6 is actually a type of Pixhawk 1 then the normal (stable) ArduSub firmware is probably fine, but otherwise there may be some minor integration issues that we would need to help fix, like with the Pixhawk 4.

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Thanks again, Elliot. The discussion you sent is really helpful. We’ll look deeper into the different information of Pixhawk itself.

We’ll check this firmware as well. Again, thanks so much for your time! This information will be very helpful to us. :grinning: