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GPS connected to pixhawk in ArduSub

ardusub

#1

I believe I read that GPS is not supported in ArduSub, since GPS is not available under water. I would find it very use-full if GPS could be enabled. I would use it to document where I leave surface and where I re-surface.

Any help on this subject would be appreciated


(Kevin) #2

GPS is supported with ArduSub.

I’ve had it working on a Pixhawk 1 with the old 3DR GPS module and on a Pixhawk 2.1 with the HERE GPS. I haven’t tried the ones from mRobotics yet.


#3

Hi Kevin,

Thanks!

It works, just had to wait/move the GPS outside…

Now I just need to figure out how to show the position in QGroundcontrol…


(Kevin) #4

Ok great! It should show up automatically, unless you are asking for the specific lat/long…that hasn’t been implemented in the widget yet.


#5

My position is on the map, I was looking for the lat/long…


(Jacob) #6

Working on adding it right now!


#7

That is great :slight_smile:

Here you see the GPS


(Kevin) #8

Ok great, let us know how it works in the water at the surface positioned like that. I’ve tried a few orientations and couldn’t get anything to work. I was going to see if one of these would be a better fit: https://store.mrobotics.io/product-p/mro-ugps-samm8q-01.htm


#9

It works on the deck of the boat, but is not very stable in water…


(Kevin) #10

Yeah, we’ll need to figure out some sort of mast to mount it on outside the ROV. GPS signals just don’t penetrate water very far.


#11

After the latest software update, my GPS stopped working. The GPS is a BN-800 with a U-blox M8. Any idea what could have changed?


(Jacob) #12

What is the GPS_TYPE parameter set to? It should be ok if it is set to Auto.


#13

I tried Auto and U-blox, for GPS 1 in parameters


(Jacob) #14

What messages do you see in the mavlink inspector? Can you show what it says for GPS_RAW_INT, and GLOBAL_POSITION_INT?


#15


(Jacob) #16

You have GPS_TYPE set to ‘None’. It needs to be ‘Auto’.


#17

That was a mistake, but here you have mavlink inspector and GPS set to auto.

The GPS is connected to GPS - port on pixhawk


(Jacob) #18

Unplug the battery from the ROV, then plug it back in. Then click the message box next to the battery voltage at the top of the screen in QGC.


#19


Looks like this


(Jacob) #20

What do the SERIAL parameters look like?