Adding MavLink Message for new facts

QGroundControl
1

I’m working on a new drone type that has some new MavLink messages. I’ve added them OK and can see them in the MavLink “browser” in QGC. I need to get them assigned to new facts to get them available to the QML that I’ve added.
Can someone give me some hints on getting the facts set up - details are appreciated.
Thanks
Larry

2

Look at the FactGroups in Vehicle.h/cc

3

I suspected that - I’ll have to trace an existing MLM through.

Thanks
Larry

4

Stuck again. I’ve added processing in vehicle for my new MAVLink message. Stuck how to reference it in my QML.

Her’es the vehicle code…
void Vehicle::_handleFuelCellStatus(mavlink_message_t& message)
{
mavlink_fuelcell_status_t fuelCellStatus;
mavlink_msg_fuelcell_status_decode(&message, &fuelCellStatus);
_fuelCellStatusFactGroup.currentAllowed()->setRawValue(fuelCellStatus.current_allowed);
// Todo - Rest of fuel cell fields
}

How do I reference that “Fact” in the QML?

Thanks
Larry

5

You reference it from the Vehicle object.

6

Thanks. I looked at a few examples and determined that and it seems ok.
I want to create an array or motor data and tried to do that. Is there a way to references array elements in the QML as well?

I saw some satellite params coming across mavlin in arrays but didn’t see where they were being copied anywhere into the vehicle object.

Thanks