WitMotion WT901WIFI Accelerometer (MPU9250) — 9-Axis WiFi IMU, 3-Axis Gyro+Acc+Angle+Mag, 200 Hz TCP/UDP, Kalman Fusion

Overview

WT901WIFI is a compact 9-axis WiFi attitude sensor built on the MPU9250 IMU. It integrates a 3-axis accelerometer, 3-axis gyroscope, and 3-axis magnetometer, and applies WitMotion’s Kalman-filter fusion algorithm to deliver low-drift attitude (roll/pitch/yaw) in dynamic motion. It streams data over 2.4 GHz Wi-Fi via TCP/UDP and supports multi-device connections—ideal for VR/AR, robotics, AGV/UGV, UAVs, safety monitoring, motion capture, and industrial posture tracking.

Key features

• Complete outputs: Device ID, timestamp, Acc (XYZ), Gyro (XYZ), Mag (XYZ), Angle (XYZ), temperature, battery level, signal, firmware version.

• Fast, adjustable rate: 0.2–200 Hz (UDP up to 200 Hz; TCP 1–10 Hz; default 10 Hz).

• Precision attitude: static angle accuracy X/Y 0.05°, dynamic 0.1° (Kalman fusion).

• Wide ranges: Acc ±16 g; Gyro ±2000 °/s; Angle range X/Z ±180°, Y ±90°.

• Wireless + portable: 2.4 GHz Wi-Fi, Type-C charging, on-board Li-ion battery.

• Developer-ready: Protocol docs, drivers, sample code, and tools provided.

• Compliance: TELEC, FCC, CE, ISO 9001 shown in materials.

Specifications

*Notes on battery/runtime: the spec table lists ~2 h at ~90 mA; some materials mention ~80 mA current and up to ~3 h at lower data rates. Real-world life depends on update rate and Wi-Fi usage.

Data protocol (excerpt)

CSV fields separated by commas:
DeviceID, AccX, AccY, AccZ, GyroX, GyroY, GyroZ, AngleX, AngleY, AngleZ, MagX, MagY, MagZ, Temperature(°C), Battery(%), Signal, Version, Alarm, Terminator
Example (line ends with \r\n):
WT53xxxxxxx,-0.102,-0.442,1.110,0.000,0.000,0.000,-21.720,5.729,96.301,71,5,-34,34.2,50,-063,0.16211,0\r\n

Package contents

• WT901WIFI inclinometer/IMU ×1

• USB-A to Type-C cable ×1

• Quick start guide ×1

Details

Ultra-high accuracy MEMS IMU suitable for IoT, environmental monitoring, UGV, energy, mapping, and building protection. The WT901WIFI Attitude Sensor includes a built-in Kalman filter, one-key network setup, and supports multiple connections. Features 3-axis accelerometer, gyroscope, angle, magnetometer, WiFi, and 200Hz output. USB interface provided. Visit www.wit-motion.com for more information.

Accelerometer WT901WIFI has TELEC, FCC, CE, and ISO 9001 certifications, meeting international quality and safety standards.

WitMotion PC Software displays real-time attitude data with angles X, Y, Z. It offers data recording, calibration, adjustable retrieval rates up to 200Hz, and easy system setup for precise measurement.

Sensor motion data displayed via curves and 3D visualization. Monitors acceleration, angular velocity, and angles. 3D model shows orientation with X, Y, Z values. Includes data recording, search, and setup options.

WitMotion Android APP enables sensor configuration, data recording, and calibration. Users can adjust settings, view real-time sensor data, and access recorded files via the app interface.

PC software supports multi-device connection, up to 8 devices. Users can pair network via WiFi configuration, set serial port, SSID, password, and communication protocol. Server connection successful message displayed.

WT901WIFI accelerometer has 3.7V-260mAh battery, ±16g acceleration, ±2000°/S angular rate, 2.4GHz WiFi, TCP/UDP support, 51.5×36×15mm size; outputs acceleration, angular velocity, angle, magnetic field, and electricity.

Universal Type-C interface offers 2 hours of battery life per charge. WT901WIFI includes an inclinometer, attitude sensor, RC measurement sensors, and deep loosening sensors. Features USB port and motion tracking via X, Y, Z axes. Compact design with handle for easy handling. Includes white USB Type-C cable. Branded WIT Motion. [www.wit-motion.com](http://www.wit-motion.com)

Document Kit includes PDF datasheet, manual, README, drivers, PC software, and Android app. Offers setup guides, protocols, source codes for custom app integration. Supports PC, Android/iOS platforms.

Data protocol for WT901WIFI accelerometer includes device ID, acceleration, angular velocity, angles, magnetic fields, temperature, electricity, signal, version, alarm, and terminator. Fields separated by commas, ending with carriage return and line feed.