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Highlights
WT901C’s scientific name is the AHRS IMU sensor. A sensor measures 3-axis angle, angular velocity, acceleration, magnetic field. WitMotion WT901C integrates a high-precision gyroscope, accelerometer, and geomagnetic field sensor, and adopts a high-performance microprocessor, advanced dynamics fusion algorithm, and Kalman dynamic filtering algorithm to quickly analyze the module's current real-time motion posture.
- By WitMotion advanced digital filtering technology, the sensor can effectively reduce measurement noise and improve measurement accuracy
- With its in-built posture solver and the dynamic Kalman filter algorithm, the sensor can accurately output the current posture of the product in a dynamic environment. The measurement accuracy of the X and Y axis can reach 0.05°, and the stability is extremely high.
- Persued for best data accuracy and stability: WTMOTION patented zero-bias automatic detection calibration algorithm and R&D dynamic fusion algorithm outperforms traditional accelerometer sensor
Technical Specifications:
- Current: <40mA
- Voltage: 5-36V (requiring a power source of 5V)
- Data output frequency：0.2-200Hz
- Baud Rate: 4800-230400 (adjustable)
- Output Content: 3-axis Acceleration+Angle+Angular Velocity+Magnetic Field+Quaternion
- Range: Acceleration (±6g), Gyroscope (±2000°/s), Magnet Field (±4900µT), Angle (X, Z-axis: ±180°, Y ±90°)
- Resolution: Acceleration (0.005g), Gyroscope (0.61°/s), Magnet Field (16 bits)
- Angle Accuracy(after calibrated): X, Y-axis: 0.05° (Static) , X, Y-axis: 0.1° (Dynamic)
Note: Z-axis angle will be affected by magnetic field. It is required to calibrate and keep the sensor at least 20cm away from the stuff like metal that may create magnetic field interference.
The bulk inquiry is welcome. Production capacity is 10,000pcs / month. If you have any interest or need any help, please feel free to reach us.
Hardware Analysis (In-built WT901)
- Embedded highly-integrated MEMS accelerometer and gyroscope sensor, more stable and reliable in attitude measurement
- Premium power chip ensuring stable supply voltage
- 4-layer PCB design and using stamps holes gold-immersion process to prevent oxidation
Cortex-M0 core processor
Built-in Cortex-M0 core processor which can operate reaching 48MHZ, faster speed in the data processing
Plastic Casing
- Net weight: 20g
- Size: 51.3mm x36mm X15mm/ 2.02" x 1.41" x 0.59"
- Two wings design at the edge, better for installation
Note: Operating temperature: -40℃ ~ +85℃
WITMOTION Algorithm Advantages
WITMOTION products are derived from the aerospace Satellite Attitude Determination Algorithm.
Built-in core algorithm:
- R&D Dynamic Fusion Algorithm
- Kalman filtering (program filter)
- Digital filtering
- State estimation algorithm
Time and energy saving: No need to write a filtering program or study the complicated protocol of MPU6050/ 9250 to analyze and collect the attitude angle data.
Data Protocol
- A detailed communication protocol will be provided for data analysis and calculation
- For details, please refer to the datasheet
Diverse Sample Code
Thanks to its diverse interface and small size, it is extremely suitable for the embedded systems. The sample codes would be provided to reduce the work and time spent on the writing program of MCU.
- Provided codes including 51 serial, C++, C#, STM32, Arduino, and Matlab
Tutorial & Development Kit
- Manual with set-up instructions
- Datasheet
- Free software for Windows PC (Minimu.exe)
- APP for Android phone
- Instruction video (search WITMOTION on Youtube)
- CH340 & CP2102 serial Drivers
Packing List
- 1x WT901C-232 Inclinometer
- 1* 4-PIN Dupont cable
- 1x Instruction card printed with QR code of document center
Our Promise:
- 30 days return refund policy for any quality issue
- Quality secured, 100% inspected & tested at factory before shipping
- Remote diagnostics and lifetime technical support by Witmotion engineering team
Android App interface
Config Menu
Real-time Data Viewing
Recorded Data
PC software for Windows
3D Display
Data Curve Display
Configuration
About WITMOTION
Established in 2014, WitMotion Shenzhen Co., Ltd aims to become a global leader in attitude sensors, AHRS IMU. Foud out more here in our Witmotion Brand Store on Amazon.
The company is dedicated to make attitude measurement and tilt angle sensing solutions more accessible and easier for engineers around the world. Widely used every day by customers in over 50 countries for energy and electric power, tower control, Monitoring, engineering machinery, medical, academic, integrated system, more developing projects.
WITMOTION' s R&D Dept.
- 20+professional engineer industry's top R&D team, and has a long-term collaboration with the Beihang University PhD team.
- WitMotion R&D protocol and Dynamic Fusion Algorithm
- over 50+ patents and software program
Research and Development Facilities:
- World's top-level of triaxial nonmagnetic turntable: All finished items will be calibrated through the turntable, ensuring the X Y Z angle's accuracy.
- High& low temperature test chamber, making sure that the sensor can actually work well under -40℃ ~ +85℃ environment
- Vector Network Analyzers(VNA): Bluetooth antenna impedance matching
- 6 degrees of freedom vibration test bench: sensor's high performance and stability secured under vibration and dynamic environment
Premium Components & QC System: All components are selected and certified under a strict quality control system from the procurement, manufacturing process to assembly, inspection.
Automatic Production&Assemble line of Factory:
- Automatic Solder Paste Printing, Imported Placement Machine, Multi-temperature Reflow Soldering, Fully Automatic Inspection
Placeholder
2025-09-02 16:51:12
It works great!
Margie Ramirez
2025-08-15 12:15:48
“The sensor works as expected. At the beginning there were some issues for get the sensor works. I contacted the Witmotion support and they solve the problem. Good sensor performance and excellent technical support!â€
R George
2025-08-10 18:27:45
Witmotion's website says there are no python software examples for this device. That is different than what you would think by looking at the ad on Amazon. The sample "python" software (they provide in a large zipped file that you download from their website) is actually in C++. I have spent four solid days trying to find a software example on the internet that I could get to work, but there is always something wrong or missing that keeps this thing from working. Oh, and the one "good" software example I found was written in a class structure, and I don't understand how the class structure works, nor was I able to unravel what it was trying to do to write non-class structure software. It also wanted to import "typing", and I think "typing" may be obsolete(?). VERY FRUSTRAITING. I am returning this to amazon.Also, it must be connected to the USB port. You can not connect it to the header pins.
M B
2025-08-01 10:19:54
Caused the computer to hang up and freeze but the seller helped
Educated Consumer
2025-07-25 12:13:29
The app for this device did not load on either Android or iPhones. The seller wanted all sorts of proofs and screen pictures: to run our time, IMO. Could not return it bc waited too long.
Tim Kern
2025-07-22 16:35:17
I bought it because the MPU6050 wandered too much.Maybe this works. I may never know, because support in the description sounds enthusiastic, but that's where it ends.The supplied sketches reference libraries that can't be easily found. Using just the library code doesn't work, either.If someone has been able to get this unit to stay calibrated and read angles to an Arduino MEGA2560, I'd sure like to hear from them. (I actually need Tangents of X and Y.) Thanks.Note: I also bought the identical-looking DFRobot unit, and encountered similar problems. I suspect these are white-labeled.
Cliente de
2025-07-19 18:59:02
No viene la tarjeta de instrucciones
Sheldon Maschmeyer
2025-07-10 10:36:02
An app called "brltty" on Ubuntu prevents "/dev/ttyUSB0" from being accessible. I uninstalled "brltty" and the WitMotion device does works. WitMotion does not officially support Linux and Python. There is a Python Module called "witmotion" (PyPi) which does work (for this model). I have tested it. I am getting the angle (x, y, z) at regular intervals. With a math formula (search for it), translated the angles to degrees (digital compass 0-360). If you do not know how to program and are not familiar with Linux, stick to Windows. The Windows App is eye-candy, user friendly. However, the usefulness is integration into applications. It would be nice if WitMotion officially supported Linux and Python however, it works for me so, I am satisfied with the product.
Placeholder
2025-07-03 10:18:05
It works great!
Margie Ramirez
2025-07-02 15:54:36
“The sensor works as expected. At the beginning there were some issues for get the sensor works. I contacted the Witmotion support and they solve the problem. Good sensor performance and excellent technical support!â€
R George
2025-07-01 13:01:34
Witmotion's website says there are no python software examples for this device. That is different than what you would think by looking at the ad on Amazon. The sample "python" software (they provide in a large zipped file that you download from their website) is actually in C++. I have spent four solid days trying to find a software example on the internet that I could get to work, but there is always something wrong or missing that keeps this thing from working. Oh, and the one "good" software example I found was written in a class structure, and I don't understand how the class structure works, nor was I able to unravel what it was trying to do to write non-class structure software. It also wanted to import "typing", and I think "typing" may be obsolete(?). VERY FRUSTRAITING. I am returning this to amazon.Also, it must be connected to the USB port. You can not connect it to the header pins.
M B
2025-05-31 13:14:14
Caused the computer to hang up and freeze but the seller helped
Educated Consumer
2025-05-20 10:38:36
The app for this device did not load on either Android or iPhones. The seller wanted all sorts of proofs and screen pictures: to run our time, IMO. Could not return it bc waited too long.
Tim Kern
2025-04-29 10:02:59
I bought it because the MPU6050 wandered too much.Maybe this works. I may never know, because support in the description sounds enthusiastic, but that's where it ends.The supplied sketches reference libraries that can't be easily found. Using just the library code doesn't work, either.If someone has been able to get this unit to stay calibrated and read angles to an Arduino MEGA2560, I'd sure like to hear from them. (I actually need Tangents of X and Y.) Thanks.Note: I also bought the identical-looking DFRobot unit, and encountered similar problems. I suspect these are white-labeled.
Cliente de
2025-03-11 10:37:10
No viene la tarjeta de instrucciones
Sheldon Maschmeyer
2025-02-08 16:40:51
An app called "brltty" on Ubuntu prevents "/dev/ttyUSB0" from being accessible. I uninstalled "brltty" and the WitMotion device does works. WitMotion does not officially support Linux and Python. There is a Python Module called "witmotion" (PyPi) which does work (for this model). I have tested it. I am getting the angle (x, y, z) at regular intervals. With a math formula (search for it), translated the angles to degrees (digital compass 0-360). If you do not know how to program and are not familiar with Linux, stick to Windows. The Windows App is eye-candy, user friendly. However, the usefulness is integration into applications. It would be nice if WitMotion officially supported Linux and Python however, it works for me so, I am satisfied with the product.
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