Mro gps

Rotorboy2.4gh · Dec 30, 2017

Can someone tell me how I can enable the Chinese constellation through u center for my Mro GPS for Solo. Thank you in advance. Frank

Pedals2Paddles · Dec 30, 2017

It can use two systems at once. By default, it uses American GPS and Russian GLONASS. Do you want to use American GPS and Chinese Beidou instead? If so, you would set parameter GPS_GNSS_MODE for 43. You can do that with the Tower or Side Pilot apps, or Mission Planner on a PC.

To put it back to normal, you would set it for 99, which again is American GPS and Russian GLONASS.

Also, this function is rarely used. So please report back if it actually works!

Rotorboy2.4gh · Dec 30, 2017

Pedals2Paddles said:
It can use two systems at once. By default, it uses American GPS and Russian GLONASS. Do you want to use American GPS and Chinese Beidou instead? If so, you would set parameter GPS_GNSS_MODE for 43. You can do that with the Tower or Side Pilot apps, or Mission Planner on a PC.

To put it back to normal, you would set it for 99, which again is American GPS and Russian GLONASS.

Also, this function is rarely used. So please report back if it actually works!

I'm a bit confused then. The newer Mro gps claims it can use 3 at once. Anyways, mine has the new mini USB you can hook up to. I figured I could do it though u center. It also claims replacement of glonass with beidou has outstanding results. It wasn't clear if that was here in the states though. Frank.

Wetstone · Dec 30, 2017

Rotorboy2.4gh said:
I'm a bit confused then. The newer Mro gps claims it can use 3 at once. Anyways, mine has the new mini USB you can hook up to. I figured I could do it though u center. It also claims replacement of glonass with beidou has outstanding results. It wasn't clear if that was here in the states though. Frank.

If you figure out how to do that, please let me know!

Rotorboy2.4gh · Dec 30, 2017

Wetstone said:
If you figure out how to do that, please let me know!

I'm working on it as we speak. I am on u center and will try Pedals suggestion as well.

Pedals2Paddles · Dec 30, 2017

Oh. Well I was reading really old ublox docs. Now that you mention it, I'm pretty sure the recent M8 firmware does 3 systems. In that case, enabling GPS, GLONASS, and Beidou would be a value of 107.

Wetstone · Dec 30, 2017

Pedals2Paddles said:
Oh. Well I was reading really old ublox docs. Now that you mention it, I'm pretty sure the recent M8 firmware does 3 systems. In that case, enabling GPS, GLONASS, and Beidou would be a value of 107.

What about the code for GPS, GLONASS and Galileo?

Pedals2Paddles · Dec 30, 2017

Wetstone said:
What about the code for GPS, GLONASS and Galileo?

That would be 103.

Rotorboy2.4gh · Dec 31, 2017

Pedals2Paddles said:
Oh. Well I was reading really old ublox docs. Now that you mention it, I'm pretty sure the recent M8 firmware does 3 systems. In that case, enabling GPS, GLONASS, and Beidou would be a value of 107.

It recommends replacing glonass for beidou. In tower, I can not find in parameters gps gns mode

allen_993 · Dec 31, 2017

Matt, I guess I'm not understanding the chart from ardupilot.org correctly. You say GPS+GLONASS+Galileo would be 103. Based on the bitmask shown, why would it not be 69?
1 (GPS) + 64(GLONASS) + 4(Galileo) = 69.

Rotorboy2.4gh · Dec 31, 2017

Pedals2Paddles said:
That would be 103.

So if I want gps- galileo- and biedu, I would want 13. Correct?

Rotorboy2.4gh · Dec 31, 2017

Anyways, no matter what I set it to, when hooking up to u center, still shows default settings. Not working. I believe this has to be done in u center. Frank.

Pedals2Paddles · Dec 31, 2017

I could have some of these wrong, because it is not documented very well with ublox. SBAS and QZSS are augmentations. And GPS, SBAS, and QZSS are seen as one system on the M8, not 3 different systems. So if you want GPS, you can include all three of them. Then add you add your soviet system and whatever else.

GPS/SBAS/QZSS, Galileo, & Glonass, which works out to 103.
GPS/SBAS/QZSS, Beidou, & Glonass would be 107.
GPS/SBAS/QZSS & Glonass would be 99 (ublox default)

Pedals2Paddles · Dec 31, 2017

I just posted asking about this in the ArduPilot discuss forum. And I pinged their GPS dude on gitter.
GNSS systems and GPS_GNSS_MODE

Rotorboy2.4gh · Dec 31, 2017

Pedals2Paddles said:
I could have some of these wrong, because it is not documented very well with ublox. SBAS and QZSS are augmentations. And GPS, SBAS, and QZSS are seen as one system on the M8, not 3 different systems. So if you want GPS, you can include all three of them. Then add you add your soviet system and whatever else.

GPS/SBAS/QZSS, Galileo, & Glonass, which works out to 103.
GPS/SBAS/QZSS, Beidou, & Glonass would be 107.
GPS/SBAS/QZSS & Glonass would be 99 (ublox default)

Rodger that, but no matter how I set it in tower, it reminds the same in u center as default

BiggityBates · Dec 31, 2017

So if I am understanding correctly, if I have the newest MRO GPS unit (the purple one with the USB connection), in order to fully utilize it's capability of tracking 3 constellations, I will have to change the "GPS_GNSS_MODE" parameter in Mission Planner to either 103 or 107, correct?

Rotorboy2.4gh · Dec 31, 2017

Doing that is not working for me

Pedals2Paddles · Dec 31, 2017

Not necessarily because I don't know what mRo sets their gps for during assembly.

allen_993 · Dec 31, 2017

Pedals2Paddles said:
I could have some of these wrong, because it is not documented very well with ublox. SBAS and QZSS are augmentations. And GPS, SBAS, and QZSS are seen as one system on the M8, not 3 different systems. So if you want GPS, you can include all three of them. Then add you add your soviet system and whatever else.

GPS/SBAS/QZSS, Galileo, & Glonass, which works out to 103.
GPS/SBAS/QZSS, Beidou, & Glonass would be 107.
GPS/SBAS/QZSS & Glonass would be 99 (ublox default)

I see now...the GPS (bit value = 1 ), selection is actually GPS/SBAS/QZSS (bit value = 35). That makes the numbers works as you showed.

So it would seem that the more constellations (I guess that's what those are called?) you set the card for, the more GPS satellites you have access to...which is good...is that correct? Should I be able to test this by setting to 1 constellation, note how many sats I get...then change to 3, note how many sats I get?? I know this I probably a dumb question...sorry.

Thanks for this information/time...one of the things I'm really liking about Solo is all this new stuff to learn!

Pedals2Paddles · Dec 31, 2017

If you set it for something like only Galieo or only Beidou, you should see remarkably less sats, maybe only 2 to 4. I believe those systems are still not nearly as robust as american GPS or the soviet glonass. My understanding of how SBAS and QZSS interact as a system or augmentation of a system on the M8 is still unclear. I could be wrong about that stuff. SBAS may count as a system, but I'm not sure. SBAS applies to Galileo and maybe glonass too.