ArduSimple RTK GPS simpleRTK3B Compass (Unicore UM982, Dual antenna heading)¶
simpleRTK3B Compass is a GNSS/RTK receiver with dual antenna which provides centimeter accurate GNSS positioning and determine precise orientation (heading).
Key features:
Down to 10 millimeters GPS accuracy
Heading accuracy of 0.1° per meter of Baseline distance
Up to 50 RTK position updates per second
Tripleband: L1, L2, L5 support
Basic jamming immunity
Where to Buy¶
Pin Map¶
The system is connected to the autopilot via one of its UARTs.
The JST-GH connector is following the Pixhawk standard:
1: 5V_IN
2: Unicore COM3 RX (3.3V level)
3: Unicore COM3 TX (3.3V level)
4: Timepulse output (3.3V level)
5: Extint (3.3V level)
6: GND
Wiring and Connections¶
All ArduSimple GNSS models come with a JST GH 6-pin connector/cable that is compatible with the Pixhawk family and many other autopilots.
XBee socket¶
The onboard XBee socket can be used to expand functionality with Plugin accessories (MR/LR/XLR radios, Bluetooth, WiFi, Ethernet, Dataloggers, RS232, Canbus, L-Band, 4G/3G/2G).
Note
The cables/connectors may be modified to connect to other autopilot boards, using the Pin Map information provided above.
ArduPilot integration¶
For normal GPS only operation, ArduPilot’s GPS parameter defaults will work for any serial port configured for SERIALx_PROTOCOL = 5.
To set up simpleRTK3B Compass receiver to use with ArduPilot, we have prepared several tutorials:
Configuration tutorial: simpleRTK3B Compass (Unicore UM982) and ArduPilot.
To achieve centimeter-level precision in positioning, RTK correction data must be sent to your drone in real time. There are two main methods for delivering this correction data:
Using NTRIP correction service: If you are going to operate in areas with reliable internet connection and NTRIP service coverage, follow Tutorial on sending NTRIP corrections to ArduPilot. If you are not aware of NTRIP service provider in your area, we have prepared the List of RTK correction service providers in your country.
Using RTK corrections from a Base Station: if there is no internet access or NTRIP correction service available in your area, refer to ArduSimple’s tutorial on sending RTK corrections from Base station to ArduPilot.