An issue setting the baud rate for UART3 with RTK Everywhere on the RTK Postcard

GPS/GNSS
1

Hi All,

I have been having trouble getting my Sparkfun LG290P RTK GNSS Breakout Board on my Rover to reach a RTK Fix solution when receiving RTCM3 messages on UART3 over a Radio telemetry link from a Sparkfun RTK Postcard. I was originally told that I needed to send RTCM3 + MSM7 correction messages and deferred to this issue which did not work.

I am presently running firmware version RTK_Everywhere_Firmware_v2_2.bin and firmware version LG290P03AANR01A05S.pkg on the Sparkfun RTK Postcard Base Station and firmware version LG290P03AANR01A05S.pkg on the Sparkfun LG290P RTK GNSS Breakout Board on the Rover.

Contrary to expectations, the RTK Everywhere version 2.2 does not replace the QGNSS app installed UART3 57600 baud with 115200 baud at every bootup and leaves it at 57600. Using 115200 baud for both the Base Station and the Rover UART3 does not result in RTCM3 transmissions whereas using 57600 baud does and the Rover obtains a RTK Float, but never a RTK Fix.

I am at a loss as to why the Sparkfun LG290P RTK GNSS Breakout Board on the Rover cannot reach a RTK Fix solution whereas my Sparkfun ZED-F9P RTK GNSS module, when receiving RTCM3 messages at 57600 baud from the same Sparkfun RTK Postcard, can reach a RTK Fix solution.

Comments please.

Regards,
TCIII

2

@TCIII : please continue at your original post. Not here. Thank you.

Paul

3

@PaulZC

The original post has been “solved” and my RTK Float/Fix issue with the LG290P RTK GNSS Breakout Board now involves the issue between using 57600 baud and 115200 baud on UART3 which is not the same as my “original post.

Regards,

TCIII