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Pixhawk+Marvelmind with paired beacons intergration

Posted: Thu May 06, 2021 2:41 pm
by Rasmus
Greetings,

I know there are a lot of pixhawk+marvelmind threads here, but I think there should be one dedicated to the paired beacons feature
AND how to get that data to the autopilot.

The problem I have is, that I can't find any information on how to get the heading data to the autopilot.
Following is from this manual:https://www.marvelmind.com/pics/marvelm ... _09_13.pdf

Connect to UART on a hedgehog – 2 wires soldering to pins required. See the picture of beacon interface below. To have the location data out, it is sufficient to connect only 2 wires: GND and USART2_TX.

What about "to have the heading data out" ?

Is it as simple as just connecting the SCL and SDA pins in addition to the usart tx and ground?

I have a HW4.9 with IMU connected to the autopilot, paired with a regular HW4.9.

I am getting a reliable 3D GPS lock and would like to understand how the paired beacons are supposed to communicate the heading data to the autopilot?

Cheers!

Re: Pixhawk+Marvelmind with paired beacons intergration

Posted: Thu May 06, 2021 7:43 pm
by Rasmus
I am using NMEA protocol

Re: Pixhawk+Marvelmind with paired beacons intergration

Posted: Tue May 11, 2021 10:49 am
by Rasmus
Is it as simple as just connecting the SCL and SDA pins in addition to the usart tx and ground?
I have tried this and it seems it is not that simple. Still the question remains...

How is heading data transmitted from the mobile beacon when using NMEA protocol?
If it is not possible with NMEA protocol, what course of action is suggested?

Re: Pixhawk+Marvelmind with paired beacons intergration

Posted: Tue May 11, 2021 9:52 pm
by smoker77
Hello.

In current version compass emulation (via SCL and SDA pins) works only for paired Super-Beacons and only with U-Blox protocol enabled.
If you use HW4.9 beacons and NMEA, compass emulation will not work.
To get heading data in NMEA you can purchase this license:
https://marvelmind.com/product/mmsw0002/
But note that this feature is supported only for Super-Beacons, Mini-Rx, Industrial Super-Beacons, Industrial-RXs, Industrial-TXs.
And not supported for HW4.9 beacons.
Also I'm not sure if the Pixhawk supports processing of this NMEA $GPHDT packet with heading data.