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Here+ RTK Rover/Base Kit
This is a GNSS base/rover receiver set that was intended to be paired with UAVs using the Pixhawk flight controller. It is based on the NEO-M8P-0/2 which is capable of dual-constellation single band RTK. The base station is a GNSS only, and required a separate telemetry radio. The rover includes the GNSS as well as I2C modules for IMU, mag, and barometric pressure.
Base
U-Blox NEO-M8P-2 with a USB port and exposed pins for UART1 Rx/Tx/GND. SMA for antenna. The -2 variant of the M8P can be used as an RTK base or rover, sending or receiving RTCM corrections.
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Rover
The rover hardware includes a GNSS + antenna and six I2C devices. It has an eight pin connector which is externally accessible by way of a cable passthrough in the case which carries the UART and I2C to the flight controller.
GNSS
The rover's GNSS is a U-Blox NEO-M8P-0. It is accessible via UART1 on the eight pin connector, and USB on the four pin connector (it uses the same as the base unit.) Note: the USB connector does not supply power to the rover or the GNSS module, voltage must be separately applied to pin 1 of the eight pin connector.
The GNSS antenna is a Taoglas CGGBP.25.4.A.02 1“ ceramic patch.