• WitMotion WT901 9-Axis Accelerometer Module AHRS IMU – Gyro & Magnetometer, 0.2–200 Hz, 3.3–5 V, TTL/I²C for Arduino & STM32
  • The WT901 GPS-IMU unit works with NMEA-0183 GPS modules, providing navigation data via TTL/I²C interfaces at 3.3–5 V. It connects to a WIT-6M-0-001 GPS module and includes a "Click to buy" button.
  • The module connects to the MCU via I²C with VCC, SCL, SDA, and GND pins. The MCU requires 4.7K pull-up resistors on SCL and SDA for open-drain compatibility.
  • Development kits include manuals, drivers, code samples, software, and tools for STM32, Arduino, 51, Windows C++, and Matlab. Supports CH340, CP2102, TTL/I²C, 3.3–5V, 0.2–200 Hz.
  • The WitMotion WT901 is a compact 9-axis IMU with accelerometer, gyro, and magnetometer. It supports 3.3V-5V, <25mA current, TTL/I²C interface, and outputs motion data at 0.2–200Hz. Size: 15.24×15.24×2mm, weight: 1g, temp: -40°C to +85°C.
  • Connect MCU to module via TTL serial port with crossed TX/RX; link VCC, GND, TX, RX pins.
  • The WitMotion JY901S/WT901 is a 9-axis IMU module offering accelerometer, gyroscope, magnetometer, and quaternion outputs, with configurable ranges and interfaces.
  • Free, user-friendly software simplifies drone setup for beginners, displaying real-time X, Y, Z angles from WitMotion's IMU system.
  • Affordable AHRS IMU with 1° Z-axis accuracy. Offers attitude, inclination, vibration sensing. Includes acceleration, gyro, angle, magnetic, quaternion, Kalman filtering. WT901 model, 3.3–5V, TTL/I²C.
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WitMotion WT901 (JY901S) 9-Axis Accelerometer Module AHRS IMU – Gyro & Magnetometer, 0.2–200 Hz, 3.3–5 V, TTL/I²C for Arduino & STM32

WitMotion WT901 (JY901S) 9-Axis Accelerometer Module AHRS IMU – Gyro & Magnetometer, 0.2–200 Hz, 3.3–5 V, TTL/I²C for Arduino & STM32

WitMotion

$45.00 USD
$45.00 USD
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Overview

WitMotion WT901 (JY901S) is a cost-effective, miniature 9-axis accelerometer module / AHRS IMU that fuses a 3-axis accelerometer, 3-axis gyroscope, and 3-axis magnetometer with an onboard 48 MHz MCU and Kalman-filter–based attitude algorithm. It outputs acceleration, angular rate, magnetic field, Euler angles, and quaternion at 0.2–200 Hz (10 Hz default) over Serial-TTL or I²C (up to 400 kHz). Angle accuracy is 0.05° (static) / 0.1° (dynamic) on X & Y, and 1° on Z after calibration. Official PC software (MiniIMU.exe) provides visualized graphs, real-time curves, 3D demo views, raw-data logging/export, and one-click calibration. Drivers (CH340/CP2102), datasheet/manual, sample code for STM32/Arduino/51/C/C++/C#, and Matlab support are included. A plug-and-play test fixture is available separately.

Note: WT901 has been discontinued and has been upgraded to JY901S. Its functions and procedures remain unchanged and it is a complete replacement.

Key Features

  • Integrated 9-axis IMU with MEMS sensors + 48 MHz core MCU and LDO power conditioning.

  • Outputs: Acceleration, Gyro, Magnetic, Angle, Quaternion; selectable content.

  • High precision: X/Y 0.05° static, 0.1° dynamic; Z 1° (post-calibration).

  • Adaptive ranges: Accel ±2/4/8/16 g; Gyro ±2000 °/s.

  • Configurable data rate: 0.2–200 Hz; baud 4800–230400.

  • Visual magnetic calibration (ellipse fitting; rotate 360° about X/Y/Z).

  • Rock-solid measurement UI: real-time plots, attitude indicator & compass.

  • Data storage & export: raw/analyzed data to TXT; quick review.

  • 3D demo & source code option to visualize motion (car, cube, headset, aircraft).

  • Wiring options:

    • Serial-TTL (TX/RX cross-connected to MCU).

    • I²C (open-drain; add two 4.7 kΩ pull-ups on SCL/SDA).

  • Use cases: IoT, environmental monitoring, building/bridge tilt, robotics & automation, forklifts & mobile machines, mining, consumer electronics, VR gadgets.

  • Certifications: Calibration report, RoHS, CE, ISO 9001.

  • Accessories: USB test fixture sold separately (reduces soldering).

Technical Specifications

Item Value
Model / Brand WT901 / WitMotion
Supply Voltage 3.3 V–5 V
Current < 25 mA
Interfaces Serial-TTL / I²C (high-speed 400 kHz supported)
Outputs Acceleration, Gyro, Magnetic, Angle, Quaternion
Measurement Ranges Accel: ±2/4/8/16 g (adaptive) • Gyro: ±2000 °/s • Angle: X,Z ±180°, Y ±90°
Angle Accuracy X/Y: 0.05° (static), 0.1° (dynamic) • Z: 1° (after calibration)
Stability Accel 0.01 g • Gyro 0.05 °/s • Angle 0.01°
Output/Return Rate 0.2–200 Hz (default 10 Hz)
Baud Rate 4800–230400
Accel Resolution ±2 g: 0.061 mg/LSB (16384 LSB/g) • ±4 g: 0.12 mg/LSB (8192 LSB/g) • ±8 g: 0.25 mg/LSB (4096 LSB/g) • ±16 g: 0.5 mg/LSB (2048 LSB/g)
Dimensions / Weight 15.24 × 15.24 × 2 mm (0.6″×0.6″×0.08″) / ~1 g
Operating Temp. –40 °C to +85 °C
Mounting Horizontal / Vertical

Software, Calibration & Dev Kits

  • Windows PC suite (MiniIMU.exe): config menu for range, bandwidth (e.g., 20 Hz), output content, baud/output rate, install direction, time-zone, device address; acceleration & magnetic calibration, Z-axis reset, angle reference; lock/unlock; GPS content toggles.

  • Drivers & Docs: CH340 & CP2102 USB-serial drivers, Datasheet.pdf, Manual.pdf, READ ME.txt.

  • Code & Examples: 51 serial, STM32, Arduino, Windows C/C++/C#, Matlab.

  • Media: demo videos (PC UI and Android app).

  • Android app available for mobile viewing/config.

Connection Notes

  • TTL Serial: cross-connect MCU-TX → Module-RX, MCU-RX → Module-TX, common GND, VCC shared.

  • I²C: open-drain; add 4.7 kΩ pull-ups to VCC on SCL and SDA; connect GND and VCC accordingly.

Details

WitMotion WT901 Accelerometer, Affordable AHRS IMU with 1° Z-axis accuracy, providing attitude, inclination, vibration, acceleration, gyro, angle, magnetic, quaternion, and Kalman filtering.

Cost-effective AHRS IMU with 1deg Z-axis accuracy, featuring attitude, inclination, vibration, acceleration, gyro, angle, magnetic, quaternion, and Kalman filtering.

WitMotion WT901 Accelerometer, The WitMotion WT901 is a small, low-power 3-axis sensor with accelerometer, gyro, magnetometer, and quaternion output, supporting 3.3V-5V, serial TTL/IIC, and operating in extreme temperatures.

WitMotion WT901 is a compact 3-axis accelerometer with gyro, magnetometer, and quaternion output. It supports 3.3V-5V, <25mA current, and serial TTL/IIC interface. Features include ±2/4/8/16g acceleration range, ±2000°/s gyro, and 0.2-200Hz return rate. Operates from -40°C to +85°C, weighs 1g, and measures 15.24x15.24x2mm.

WitMotion WT901 Accelerometer, The WitMotion WT901 features MEMS sensors, a 48MHz MCU, and gold-immersed copper interface, providing high precision and stability through Kalman filtering, and is RoHS, CE, and ISO-9001 certified with a calibration report.

WitMotion WT901 includes MEMS sensor, 48MHz MCU, LDO power chip, and gold-immersed copper interface. It offers high precision and stability via Kalman filtering. Certified with RoHS, CE, ISO-9001, and calibration report.

WitMotion WT901 Accelerometer, WitMotion Algorithm merges aerospace satellite attitude determination with Kalman filtering and motion fusion, achieving high angle accuracy for X, Y, and Z axes.

WitMotion Algorithm combines aerospace satellite attitude determination with Kalman filtering and motion fusion. Achieves angle accuracy: X, Y-axis 0.05° (static), 0.1° (dynamic); Z-axis 1° (calibrated). Graph displays angular data over time.

WitMotion WT901 accelerometer used in IoT, environmental monitoring, robotics, automation, energy, mining, VR, and bridge protection.

WitMotion WT901 accelerometer for IoT, environmental monitoring, robotics, automation, oil & energy, mining, VR gadgets, and bridge structure protection.

WitMotion WT901 Accelerometer, Free, user-friendly software offers easy setup and real-time angle data (X:10.54°, Y:-7.96°, Z:-105.78°) via USB-connected test fixture, no soldering required.

Free & genuinely useful software offers a user-friendly design for easy setup and data retrieval. The WitMotion Shenzhen Co., Ltd Attitude Measurement System displays real-time angles: X at 10.54°, Y at -7.96°, and Z at -105.78°. A test fixture is sold separately, enabling plug-and-play functionality to eliminate soldering hassles. The fixture connects via colorful wires to a USB interface, simplifying integration with laptops. Click to buy for convenient access to this reliable sensor solution.

The WitMotion WT901 accelerometer features a config menu for calibration, range, communication, and settings, with real-time data visualization for motion tracking.

WitMotion WT901 accelerometer config menu offers calibration, range, communication, and content settings. Real-time data visualization includes acceleration, angular velocity, angle, and magnetic field with a compass display for precise motion tracking.

WitMotion WT901 Accelerometer, The WitMotion WT901 provides data storage, raw data display, and 3D motion visualization with customizable models for diverse applications.

WitMotion WT901 offers powerful data storage and export, displaying raw data and enabling TXT file recording. The 3D demo provides intuitive motion visualization with customizable models for various applications.

WitMotion WT901 Accelerometer, Visualizable magnetic calibration with ellipse fitting and 360-degree rotation. Includes TTL serial and I2C connection diagrams with MCU, cross-connected TX/RX, and 4.7K pull-up resistors for I2C.

Visualizable magnetic calibration for initial use, featuring ellipse fitting and 360-degree rotation. Includes TTL serial and I2C connection diagrams with MCU, noting cross-connected TX/RX and 4.7K pull-up resistors for I2C.

WitMotion WT901 Accelerometer, Development Kits include manuals, software, drivers, sample code, and files like PDFs, videos, and an Android app.

Development Kits include manual, datasheet, free Windows software, CH340 & CP2102 drivers, sample code for 51, C++, STM32, Arduino, and Matlab. Files: PDFs, driver folders, demo videos, and Android app.

WitMotion WT901 Accelerometer, R&D tests WT901 accelerometer under 3-axis rotation, vibration, temperature extremes, and 72-hour aging.

R&D facilities test WT901 accelerometer with 3-axis turntable, 6 DOF vibration, temperature extremes, and 72-hour aging.

The WitMotion WT901 accelerometer measures 15.24×15.24×2.54 mm, features 12 pins for various I/O options, and defines axial directions using the right-hand rule with X, Y, Z axes.

WitMotion WT901 accelerometer dimensions: 15.24×15.24×2.54 mm. Features 12 pins for analog/digital I/O, PWM, UART, I2C, and power. Axial directions defined by right-hand rule with X, Y, Z axes.

The WitMotion WT901 accelerometer features a 0.2–200Hz refresh rate, 3.3–5V voltage, and supports multiple sensors via TTL/IIC for various platforms.

WitMotion WT901 accelerometer offers 0.2–200Hz return rate, 3.3–5V voltage, and supports acceleration, angle, gyroscope, magnetic field, barometer via TTL/IIC for Android, PC, MCU, Arduino.

 

 

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