ZeroOne OneRTK UM982 RTK GNSS Heading Module, Dual Antenna, DroneCAN, UM982, Optional OneCompass RM3100

Overview

The ZeroOne OneRTK UM982 is an RTK GNSS heading module designed for high-precision positioning and dual-antenna orientation. It supports on-chip RTK positioning and a dual-antenna directional solution, and can be used as an RTK rover or base station. It supports multi-satellite joint positioning and single-system independent positioning modes for flexible configuration.

Key Features

• Dual-RTK dual RTK engine technology
• Dual antenna input for high-precision orientation and improved operation in complex magnetic environments
• Adaptive recognition of differential input RTCM format
• Full-system, full-frequency on-chip RTK positioning and dual-antenna heading solution
• Satellite/frequency support: BDS B1I/B2I/B3I + GPS L1/L2/L5 + GLONASS L1/L2 + Galileo E1/E5a/E5b + QZSS L1/L2/L5 + SBAS
• Board USB supports switching between air end and ground end (as shown in images)
• Antenna-end protections (as shown in images): short-circuit protection, reverse-connection protection, surge protection, AC isolation, ESD protection
• Backup power circuit for hot start; faster satellite search after re-power (as shown in images)
• Automatic power switching between USB, CAN, and serial (as shown in images)

Specifications (OneRTK UM982)

Processor	STM32G474
Positioning module	UM982
Positioning system	BDS/GPS/GLONASS/Galileo/QZSS
Main antenna frequency	BDS: B1I, B2I, B3I GPS: L1C/A, L2P(Y)/L2C, L5 GLONASS: G1, G2 Galileo: E1, E5a, E5b QZSS: L1, L2, L5
Slave antenna frequency	BDS: B1I, B2I, B3I GPS: L1C/A, L2C GLONASS: G1, G2 Galileo: E1, E5b QZSS: L1, L2
Positioning accuracy	Point Positioning (RMS): Horizontal: 1.5m, Elevation: 2.5m DGPS (RMS): Horizontal: 0.4m + 1ppm, Elevation: 0.8m + 1ppm RTK (RMS): Horizontal: 0.8cm + 1ppm, Elevation: 1.5cm + 1ppm
Directional accuracy (RMS)	0.1°/1 m baseline
Maximum satellite search capability	GPS: 28+; RTK: 50+
Positioning speed	Cold start <30s; Assisted start <5s
Speed accuracy	0.03m/s
Data refresh rate	5Hz (default); maximum 20Hz
Differential data format	RTCM3.x
Communication protocol	DroneCAN/NMEA-0183, Unicore
Interfaces	Antenna interface x 2; CAN interface x 2; UART x 1; Type-C x 1
Antenna gain	32±2dB
Operating voltage	4.7~5.3V
Operating temperature	-20~85°C
Weight	Main body 23.8g; each cylindrical antenna 15g
Module dimensions	47.25mm x 32.3mm x 11.5mm

Interface Definition 

• Antenna ports: MAIN ANT, SLAVE ANT
• CAN 1 / CAN 2 pinout: 5V, CAN_H, CAN_L, GND
• UART pinout: GND, TX2, RX2, 5V

Indicator Lamp Definition

• PWR: Steady on when powered. Off indicates voltage abnormality.
• SYS: Off indicates system not booted. Steady yellow indicates normal boot.
• CAN: Flashes green twice when no communication is active. Flashes once per second when communication is normal.
• RTK: Off when no RTCM data is received. Steady blue when RTCM data is received.
• PVT: Steady on when satellite search and positioning are normal. Off when no satellite signal is received.
• ERR: Off when no fault is detected. Flashes red when a fault is detected.

Specifications (OneCompass RM3100, when included)

Magnetic sensor	RM3100
Communication protocol	DroneCAN
Processor	STM32L431
Communication rate	2Mbps/s Max
Heading accuracy	0.01°
Range	-800 to +800µT
Sensitivity	50µT@50 counts; 26µT@100 counts; 13µT@200 counts
Noise	30µT@50 counts; 20µT@100 counts; 15µT@200 counts
Linearity	0.5%@±200µT
Oscillator frequency	180kHz
Supply voltage	4.6V~5.3V
Operating temperature	-20°C~85°C
Weight	8.4g
Dimensions	34.2mm x 16.2mm x 10.6mm

What’s Included (package options shown in images)

OneRTK UM982 Single RTK Kit

• OneRTK UM982 x 1
• Cylindrical antenna x 2
• Antenna coax cable (50cm) x 2
• 35 x 30 3M adhesive pad x 2
• CAN/I2C cable (30cm) x 1
• Serial cable (30cm) x 1
• OneRTK UM982 certificate x 1

OneRTK UM982 Kit with Compass

• OneRTK UM982 x 1
• OneCompass RM3100 x 1
• Cylindrical antenna x 2
• Antenna coax cable (50cm) x 2
• 35 x 30 3M adhesive pad x 2
• 25 x 15 3M adhesive pad x 2
• CAN/I2C cable (30cm) x 1
• Serial cable (30cm) x 1
• Certificate x 1

OneRTK UM982 Base Station Kit

• OneRTK UM982 x 1
• Mushroom antenna x 1
• Antenna coax cable (2m) x 1
• 35 x 30 3M adhesive pad x 2
• Type-C cable (1m) x 1
• Serial cable (30cm) x 1
• OneRTK UM982 certificate x 1

Applications

• Drones
• Precision agriculture
• Intelligent driver testing

Manuals

• OneRTK UM982 documentation

For product selection, wiring questions, or after-sales support, contact support@rcdrone.top or visit https://rcdrone.top/.

Details

OneRTK UM982 device with MAIN ANT, SLAVE ANT, PWR, SYS, CAN, RTK, PVT, ERR indicators. Features UART, CAN1, CAN2 ports. Dimensions: 47.25mm height, 32.3mm width, 11.5mm depth.

OneRTK UM982: dual-antenna centimeter-level RTK module. Supports DroneCAN, industrial compass, four satellite systems, precise heading positioning.

Supports four satellite systems: GPS, Beidou, Glonass, Galileo, QZSS. Features a multi-frequency receiver with rich bands. Maximum satellite tracking: GPS 28+, RTK 50+. RTK positioning accuracy reaches 0.8cm + 1PPM (horizontal), 1.5cm + 1PPM (vertical). Background depicts Earth from space with satellite hardware visible.

OneRTK UM982 supports dual-antenna direction finding, enabling precise drone heading measurement via dual-antenna reception for enhanced flight navigation accuracy.

DroneCAN communication via a built-in CAN expansion port uses the DroneCAN bus protocol for enhanced interference resistance. It supports adding peripherals like the OneRTK RM3100 external compass or other CAN devices, enabling flexible configurations. Interconnected modules—OneCompass, OneRTK, and X6 Autopilot—are linked by blue lines representing data flow.

Board-mounted USB, interchangeable aerial/ground ends. Antenna with short-circuit, reverse polarity, surge, AC isolation, ESD protection. Backup circuit for faster hot start. Automatic switching among USB, CAN, serial power sources.

OneRTK UM982 specs: STM32G474 processor, multi-GNSS support, 0.8cm RTK accuracy, 5Hz refresh, CAN/UART/Type-C interfaces, 4.7-5.3V voltage, -20~85°C operation, 23.8g weight.

OneCompass RM3100 specs: magnetometer, DroneCAN protocol, STM32L431 processor, 2Mbps max rate, 0.01° heading accuracy, ±800μT range, 8.4g weight, operates -20°C to 85°C, 4.6-5.3V supply.

OneRTK UM982 single RTK package includes device, two cylindrical antennas, two 50cm antenna cables, two 3M adhesive pads, one 30cm CAN/I2C cable, one 30cm serial cable, and one certificate.

OneRTK UM982 kit includes heading module, compass, antennas, cables, adhesive tapes, and certificate. Designed for precise positioning with integrated components for seamless setup and operation in surveying or navigation applications.

OneRTK UM982 base station package includes module, mushroom antenna, 2m cable, 3M tapes, Type-C cable, serial cable, and certificate. Designed for precise positioning applications.