Overview
The WitMotion WT61 is a 6-axis MEMS attitude sensor that outputs 3-axis acceleration, 3-axis angular velocity, and fused angle (roll/pitch/yaw). It uses a 48 MHz MCU with an embedded IMU (MPU6050, per model naming) and WitMotion’s dynamic fusion + Kalman filtering to deliver high stability, low noise, and precise angle results. The module communicates via Serial TTL and is tiny (15.24 × 15.24 × 2 mm, ~1 g), making it easy to embed in IoT devices, robots, mobile machinery, structural monitoring, consumer electronics, and VR gadgets.
Key Features
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3 outputs: acceleration, angular velocity, and angle (attitude).
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Fusion algorithm: dynamic fusion + Kalman filtering; satellite-grade attitude algorithm heritage; angle accuracy 0.05° (static), 0.1° (dynamic).
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High-quality hardware: 48 MHz core MCU, stable power chip, gold-immersion copper pads, embedded MEMS sensor.
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Tiny & light: 15.24 × 15.24 × 2 mm, ~1 g; horizontal/vertical mounting supported.
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Selectable data rates & baud: 20 Hz / 100 Hz return rate; 9600 / 115200 bps.
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Android app + Windows software: real-time plotting, recording, raw data view, TXT export, 3D demo viewer, and rich configuration (bandwidth, output rate, placement, thresholds, sleep, Z-axis reset).
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SDK & examples: Matlab, Python, Raspberry Pi, STM32, ROS, Arduino, C/C++.
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Documentation & tools: datasheet, manual, MiniIMU.exe, CH340/CP2102 drivers, demo videos.
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Quality & support: factory calibration report shown; RoHS, CE, ISO 9001.
Technical Specifications
| Item | Details |
|---|---|
| Model / Brand | WT61 / WitMotion |
| Supply Voltage | 3.3 V ~ 5 V |
| Current | < 10 mA |
| Interface | Serial TTL |
| Output Content | 3-axis acceleration, 3-axis angular velocity, angle |
| Acceleration Range | ±2/±4/±8/±16 g (adaptive) |
| Gyro Range | ±2000 °/s |
| Angle Range | X, Z: ±180°; Y: ±90° |
| Angle Accuracy | X/Y static 0.05°; dynamic 0.1° |
| Stability (bias) | Acc: 0.01 g; Gyro: 0.05 °/s; Angle (XY): 0.01° |
| Return Rate | 20 Hz / 100 Hz |
| Baud Rate | 9600 / 115200 bps |
| Acceleration 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) |
| Size / Weight | 15.24 × 15.24 × 2 mm (0.6″ × 0.6″ × 0.08″) / ~1 g |
| Operating Temp. | –40 °C to +85 °C |
| Axis Definition | Cartesian coordinates, right-hand rule |
| Mounting | Horizontal or Vertical |
Pinout & Mechanical
Board outline (mm): A = 15.24, B = 15.24, C = 2.54, D = 12.7, E = 2.
Pins:
| # | Name | Function |
|---|---|---|
| 1 | D0 | NC reserved |
| 2 | VCC | 3.3–5 V |
| 3 | RT | Serial data input, TTL level |
| 4 | TX | Serial data output, TTL level |
| 5 | GND | Ground |
| 6 | SWIM | SWIM data interface |
| 7 | D2 | NC reserved |
| 8 | VCC | 3.3–5 V |
| 9 | SCL | NC reserved |
| 10 | SDA | NC reserved |
| 11 | GND | Ground |
| 12 | D3 | NC reserved |
MCU wiring (diagram shown): TTL serial to host MCU with TX↔RX cross-connection (VCC, TX, RX, GND).
Software, Apps & Tools
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Android App: connect via USB-to-TTL + phone OTG; real-time plots for Acc/Gyro/Angle; Record button; modules menu (3-axis / 6-axis / 9-axis / BLE5.0 / WT901-WIFI); rich Config pages (acc calibration, install direction, retrieval rate, measurement bandwidth, static detection threshold, pattern selection).
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Windows PC (MiniIMU.exe): live attitude gauges, real-time curves (“Rock-solid Data Measurement”), Data Storage & Export (raw and parsed data to TXT/CSV-style), Config Menu (baudrate 115200, mode=Serial, direction selection, bandwidth e.g., 94 Hz, sleep, reset Z-axis to 0°).
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3D Demo: visualizes sensor motion; 3D source code offered (as indicated).
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Test fixture: optional plug-and-play clamp for wiring without soldering (sold separately).
Algorithms & Performance
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WitMotion Algorithm × Kalman Filter: derived from Aerospace Satellite Attitude Determination methods; combines kinetic fusion, digital filtering, state estimation; delivers the stated 0.05°/0.1° angle accuracy and excellent bias stability/low noise (plot and badges shown).
Typical Applications
IoT devices, environmental monitoring, building structure protection, robotics & automation, oil & energy, mobile machines, mining industry, consumer electronics, VR gadgets.
Compliance & Support
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Certificates shown: Calibration Report, RoHS, CE, ISO 9001.
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Comparative card notes: factory tested before shipping, SDK available, 12-month warranty, lifetime technical support from WitMotion R&D.
Notes & Accessories
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Included: WT61 module.
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Optional: USB-to-TTL converter, phone OTG adapter, acrylic test fixture clamp.
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Use right-hand coordinate convention and follow the horizontal/vertical install directions shown in software for best accuracy.
Details

WitMotion WT61 IMU provides 0.05deg pitch accuracy, digital filtering, fusion algorithm, and includes acceleration, gyro, angle, vibration, MCU, and filtering features.

WitMotion WT61 IMU offers 3-axis acceleration, gyro, and angle output. It supports 3.3V-5V, low current, serial TTL, ±2/4/8/16g adaptive range, high accuracy, compact size, light weight, and wide temperature range.

WitMotion WT61 IMU offers high precision with Kalman filtering, certifications include RoHS, CE, ISO-9001. Features 48MHz MCU, MEMS sensor, stable power chip, and gold-immersed copper interface.

WitMotion Algorithm x Kalman Filter. The WitMotion algorithm originates from the Aerospace Satellite Attitude Determination Algorithm, combined with Kalman filtering and motion dynamic fusion. Angle accuracy: X, Y-axis: 0.05° (Static), 0.1° (Dynamic). The graph displays angular data over time, with blue, red, and yellow lines representing different measurements or filtered outputs. Time stamps range from 15:21:09:210 to 15:21:15:223. The vertical axis spans from -180 to 180 degrees.

WitMotion WT61 IMU for IoT, environmental monitoring, robotics, automation, mining, bridges, VR gadgets, and industrial applications.

WitMotion IMU provides high accuracy, stability, compact size, superior components, SDK, factory testing, and lifetime support. It includes Kalman filtering, fusion algorithm, and a 12-month warranty, outperforming others.

WitMotion WT61 IMU features a 12-pin layout with VCC, GND, TX, RX, SCL, SDA, SWIM, and reserved ports; includes size details in mm.

WitMotion WT61 IMU connects via USB to OTG adapter for smartphone data viewing and recording. Multifunctional Android app displays real-time sensor data, including angles, acceleration, and timestamps, with options for configuration and data logging.

WitMotion WT61 IMU offers easy setup, plug-and-play functionality, and real-time attitude measurements with angle readings.

WitMotion WT61 IMU offers calibration, real-time measurement, and data export. Displays and stores acceleration, angular velocity, magnetic field, and raw data in TXT format.

3D demo displays sensor motion intuitively. SDK supports Matlab, Python, Raspberry Pi, STM32, ROS, Arduino, and C++/C#. TTL serial connection with MCU; TX and RX are cross-connected.

3D demo visualizes sensor motion with car, helmet, cube, and drone models. SDK supports Matlab, Python, Raspberry Pi, STM32, ROS, Arduino, and C++/C#. Serial connection via TTL links MCU and module with cross-connected TX and RX.

IMU testing includes 3-axis turntable, vibration sweeps, temperature extremes, aging, and high-temperature evaluations.


WitMotion WT61 IMU offers 20-100Hz return rate, 3.3-5V voltage, and senses acceleration, angle, and gyroscope. Supports TTL interface, compatible with Android, PC, MCU, and Arduino.
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