sparkfun NEO-M8P-2 Hook-Up Manual page 13

Click the '...' button to configure your serial port. Note that you'll need to select the same baud rate as your GPS-
RTK module is configured for. By default, the NEO-M8P communicates at 9600bps 8-N-1, so use this setting.
Once you have things configured properly the TX LED on the Serial basic should blink once per second indicating
the UNAVCO server is pushing data all the way down to the TX pin on the Serial Basic.
The RTCM pipe is complete. Now we need to connect the "last inch" to the NEO-M8P.
Time to power up up the GPS-RTK board. Attach a micro-B cable to the GPS-RTK board. The power LED should
illuminate. Open the U-Center software from U-blox. Be sure to read Getting Started with U-Center if you haven't
already. Thankfully, the NEO-M8P's default configuration allows it to receive RTCM correction data without any
further changes. All you need to do is feed the NEO-M8P with serial data and it will begin calculating the high
precision location solution.
Select the correct COM port and begin viewing the NMEA data. You should have a position lock very quickly. Once
the PPS LED begins to blin0,k you are ready to start piping RTCM data to the GPS-RTK board.