WitMotion WTRTK-M10 / M20 / M20D – Full-Constellation, Full-Frequency RTK GNSS Modules (30 s TTFF, Anti-Jamming)

Description

Overview

The WitMotion WTRTK-M series are extra-compact RTK GNSS modules built around bynav GNSS SoCs and designed for UAVs, autonomous vehicles, surveying & mapping, and precision agriculture. They provide centimeter-level RTK positioning, PPS time sync, real-time map tracking, satellite signal visualization, and strong anti-interference processing.

TheWTRTK-M10 is an extra-compact, high-precision RTK GNSS positioning module for robotics, UAVs, autonomous vehicles, surveying, and precision agriculture. It integrates a bynav-M10 GNSS SoC with full-constellation, full-frequency reception and advanced anti-interference processing, delivering centimeter-level RTK accuracy and robust heading/position output in complex RF environments. Real-time map tracking, satellite signal views, and diagnostic charts are supported in the WitMotion toolkit.

Model options & key differences

• WTRTK-M10 bynav-M10, 1500 channels, single-antenna compact rover.

• WTRTK-M20 bynav-M20, 1507 channels, single-antenna, adds L-Band* and NavIC in the listed signal set.

• WTRTK-M20D bynav-M20D, 1507 channels, dual-antenna heading/positioning.

All three share the same board size 26 38 7.6 mm, 5 V supply, cold start 30 s, hot start 5 s, baud 115200, RTK accuracy listed below, and anti-jamming processing.

Key Features

• Full-constellation / full-frequency GNSS with 1500 channels (bynav-M10).

• Centimeter-level RTK: Horizontal 1 cm + 1 ppm, Vertical 1.5 cm + 1 ppm.

• Fast TTFF: Cold start 30 s, hot start 5 s.

• Anti-jamming (SAIF): Adaptive suppression of vehicle anti-tracking, radar and tower interference.

• Time & speed precision: Time accuracy 20 ns, speed accuracy 0.03 m/s (RMS).

• PPS output for time synchronization.

• Compact & light: 26.0 38 7.6 mm board with onboard heatsink area.

• Software tools: Real-time map tracking, satellite/constellation signal display, VSWR/return-loss antenna diagnostics.

Common performance

• RTK accuracy: Horizontal 1 cm + 1 ppm, Vertical 1.5 cm + 1 ppm

• Single-point positioning: Horizontal 1.5 m, Vertical 2.5 m

• PPS: Pulse-Per-Second output

• Operating temperature: 40 C ~ +85 C

• Storage temperature: 40 C ~ +105 C

• Software tools: Map tracking, satellite signal display, antenna impedance/VSWR diagnostics

• Applications: Autonomous driving/AGV, drones, surveying, precision agriculture

Signals / channels / antennas

Model	Channels	Antennas	Listed signal reception*
WTRTK-M10	1500	1	BeiDou B1I/B2I/B2a/B3I; GPS L1 C/A, L1C; GLONASS G1/G2; Galileo E1/E5a/E5b
WTRTK-M20	1507	1	L-Band* / BDS / GPS / GLONASS / Galileo / QZSS / NavIC / SBAS*
WTRTK-M20D	1507	2	BDS / GPS / GLO / GAL / QZSS / SBAS*

*Exactly as shown on the images; asterisks appear in the originals.

Electrical / timing

Model	Supply	Typical GNSS power	Cold start	Hot start	Baud
WTRTK-M10	5 V	(not shown on the M10 card)	30 s	5 s	115200
WTRTK-M20	5 V	220 mA @ 5 V	30 s	5 s	115200
WTRTK-M20D	5 V	220 mA @ 5 V	30 s	5 s	115200

Pinout & Wiring (two 6-pin headers)

Pin	Name	Function
1	PPS	Pulse-Per-Second
2	VCC	5 V power input
3	RX2	Serial Port 2 Data Input
4	TX2	Serial Port 2 Data Output
5	GND	Ground
6	EN	High-level enable
7	PPS	Pulse-Per-Second
8	VCC	5 V power input
9	RXD	Serial Data Input
10	TXD	Serial Data Output
11	GND	Ground
12	EN	High-level enable

Board dimensions called out on drawing: 36.58 mm overall height (30.86 mm module area), 25.66 mm top width (20.07 mm inner), pad spacing 5.73 mm / 14.2 mm (as labeled).

Typical Applications

• Autonomous driving / AGVs

• Drones (UAV/UAS)

• Surveying & mapping

• Precision agriculture

RTK Principle (module workflow)

Base station generates differential data transmits via radio/data network rover (this module) applies corrections for real-time centimeter-level positioning.

Packing list

• WTRTK-M10 / M20 / M20D module (per selection)

• Pin headers

• Heatsink

• Feeder cable (U.FL to bulkhead feed-through, as shown)

Model Family (for selection)

• WTRTK-M10 bynav-M10, 1500 ch, single-antenna (this page)

• WTRTK-M20 bynav-M20, 1507 ch, single-antenna

• WTRTK-M20D bynav-M20D, 1500 ch, dual-antenna heading

Details

WitMotion WTRTK-M10/M20/M20D GNSS modules feature bynav chips, supporting multiple satellite systems. They offer high positioning accuracy, fast time-to-first-fix, and operate within wide temperature ranges, with compact dimensions and 5V power supply.

RTK Principle: Real-Time Kinematic positioning uses a fixed ground station to calculate GPS errors and transmit corrections via GPRS to a rover, enabling centimeter-level accuracy. Base station generates, transmits differential data; rover uses it for precise real-time positioning.

All-satellite all-frequency high-precision positioning and heading module. Enables centimeter-level accuracy in autonomous driving, drones, surveying, and precision agriculture with real-time data output.

Centimeter-level RTK positioning offers 1 cm accuracy. Supports full-system, full-frequency multi-GNSS. Features strong satellite acquisition, anti-interference, and real-time map tracking with detailed position display.

Signal display monitors satellite frequency and positioning status for accurate navigation. Antenna impedance performance includes VSWR, return loss, and Smith chart analysis via network analyzer.

WitMotion WTRTK-M10/M20/M20D for autonomous driving, drones, surveying, precision agriculture.

WitMotion WTRTK-M10/M20/M20D module features USB interface, 12-pin layout, power, serial communication, PPS, and enable functions for GPS applications.

WitMotion WTRTK-M10/M20/M20D includes mainboards, pin headers, heat sinks, and feeder cables for each model.