Why skyviper can get DGPS 3D lock with it’s original EvaM8M gps chip without receiving RTCM message?

@Huibean what are you using to send RTCM messages?

I’ve found a problem with ArduPilot’s uBlox configuration.
Initialisation tries to set config by speaking NMEA but the module is only listening to ubx packets.
This is solved by
#define UBLOX_SET_BINARY_115200 "\265\142\006\001\003\000\001\006\001\022\117\265\142\006\000\024\000\001\000\000\000\320\010\000\000\000\302\001\000\007\000\001\000\000\000\000\000\276\162"
which sets CFG PRT to listen to ubx+NMEA+RTCM2 by means of ubx binary packets.
I am now able to fix NTRIP DGPS with SkyViper Journey ( ͡° ͜ʖ ͡°)
This also allows us get rid of the GPS_DRV_OPTIONS=4 hack.

Yep,that’s the point