Dave, I am not sure why the M8P will not let me send this configuration.
Please try with the M8N and let me know what happens.
After a save i get this
After a save i get this
Curt, no it wonāt do it. If I send that configuration and then select something else and go back to it itās reverted to what is was. Iām scratching my head over what is really supported with the module and the config from Mission Planner. I donāt have any complaints really with the GPS+Sbas+Gloness config but it bother me that I donāt understand what can be utilized and configured. The engineer in me canāt let it go 
Dave, agreed I will look into it. I have another case open at ublox once that is solved or replied to I will pose this Q.
@mtnsurveyor
Do you use this ttl adapter to connect gps to pc ?
https://www.banggood.com/FT232RL-FTDI-USB-To-TTL-Serial-Converter-Adapter-Module-For-Arduino-p-917226.html
No I have the Here+ M8P it has a usb cable that comes with the units (both base and rover).
There is a port inside the here+ gps puck. If I remember correctly, the RTK base usb fits for a U center link. Changing some stuff in U center should enable more GNSS systems. Iād have to check my other airframes to refresh my memory, but Iām tackling other issues currently.
Yes, Iām in China, I can get 10 to 15 Beidouās satellites, and 10 to 13 GPSās satellites
This is what I found should work.
try USB-to-CMOS Serial adapter from SiLabs parts.
I could not find it. It looks like this one should work. Same as the on you found.
TTL Converter: https://www.banggood.com/3_3V-5V-USB-to-TTL-Converter-CH340G-UART-Serial-Adapter-Module-STC-p-1232728.html?rmmds=myorder
I think i found the problem after connecting my m8n with FDTI adapter i got everything same as mission planner passthru
In the picture abow we cant check/uncheck items in red circle because they are the gnss system enabled in firmware for example if you install firmware 3.0.1 the Galileo gnss syatem will automatically enable
And if you want to configure your gps gnss system you have to check/uncheck items in green circle
Good work! I will try this. Can you enable beidou?
Yes beidou is enabled in default firmware
M8N refresh frequency depends on the number of GPS system selected.
GPS or another one is 10hz
GPS + GLONASS or another one (Beidou or Galileo) is 5hz
GPS + GLONASS + GALILEO is 3hz
Ardupilot check the configuration, 3hz refresh is not a valid parameter so you have to choose a valid one with 1 or 2 navigation system (10hz or 5hz).
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Back to Europe Galileo was also not visible.
I had to activate MSG --> ā01-30 NAV-SVINFOā to see Galileo in u-center.
So Galileo was probably visible in the US. u-center just didnāt show it with the default M8N config.
This was a brand new mRo M8N directly connected to u-center. It was never connected to a FC at this time.
Hello all.
Iām using u-Blox M8N GPS.
I have selected Beidou in u-center but I canāt get any of Beidouās satellites. While I receive about 11 Beidouās satellites with the phone GPS.
Can anyone help me?
Which brand GPS are you using? There are lot of fake M8N available in market.
