- 【 High Performance 】Rock-solid data output: 3-axis XYZ (Pitch Roll Yaw) Acceleration+ Gyro+ Angle+ Magnetic field+Quaternion, measurement range and output rate ( 0.2-200Hz) selectable
- 【 Robust Design 】 Cortex-M0 core processor, highly-integrated MEMS, and Kalman Algorithm combine to deliver measurement accuracy at 0.05 degree(X, Y-axis), small in size, diverse interface, professional for customer’s integration project
- 【 WITMOTION Advantage 】8-year Professional Attitude Measuring Solution Provider, sensors integrated R&D dynamic fusion algorithm and Kalman Filtering ensuring stable data output and excellent bias stability, low noise level, increasing measurement accuracy
- 【 Worry-free Support 】12-month warranty, lifetime friendly customer service by WitMotion team. Option 1. The tutorial link is printed on the guiding card inside the package. Option 2. search wit-motion(dot)com and download the complete tutorial. Option 3. contact us if you need any help, support (at) wit-motion (dot) com
- 【 What You Get 】1 x WitMotion WT901 TTL Accelerometer sensor+ 2* Six pin male header (1×6) +1 x Welcome guide (USB-UART converter not included )
Product Description
Highlights
WT901’s scientific name is the AHRS IMU sensor. A sensor measures 3-axis angle, angular velocity, acceleration, magnetic field. WitMotion WT901 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: <25mA
- Voltage: 3.3-5V (requiring a power source of 3.3-5V)
- Data output frequency：0.2-200Hz
- Baud Rate: 4800-961200 (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.
Hardware Analysis
| Cortex-M0 core processorBuilt-in Cortex-M0 core processor which can operate reaching 48MHZ, faster speed in the data processing | Connection with External GPS ModuleThe attitude sensor module can be connected to all GPS modules that comply with the NMEA-0183 specification to form a GPS-IMU inertial navigation system to obtain information such as longitude, altitude, heading, speed, and displacement. Such as the NEO-6MGPS module. Note: The GPS module is not included inside the package. | WITMOTION Alrogithm AdvantagesWITMOTION products are derived from the aerospace Satellite Attitude Determination Algorithm. Built-in core 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. |
Small in SizeWith its clear circuit board design, orderly soldering joints, the extended soldering scheme is diverse. Easy to solder and mount to customer’s board.
Note: Operating temperature: -40℃ ~ +85℃ | Example Source CodeThanks 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.
| Tutorial
| Applications
|
Free & Genuinely Useful Software
Compared with traditional sensor’s simplified serial software, WITMOTION software offers several advantages over competing sensor:
- configurations setting
- dashboard, 3D DEMO, data curve & chart display in real-time
- data record and playback, raw data reviewing, and more
Notice: There is no software for the Linux, Python, or Mac system at present. Witmotion software is provided as free, compatible with the Windows system only, including Win 10, 8, 7, XP.
3D DEMO
More intuitive to view the sensor’s motion state. There are 4 types of simulation, car, head, plane, cube. The source code of 3D can be provided if customers have needs.
Use Instructions with Windows PC:
- Download the complete tutorial and unzip the file, follow the instructions of the manual or video demo (There will be an instruction card printed with two QR codes indicating the document download link, one is Google Drive, another is Github. )
- Wiring Connection: USB-TTL serial converter cable (recommended cable ASIN: B07WG7MQRM ) PIN instruction: VCC-5V, GND-GND, RX crossly connecting with TX, TX crossly connecting with RX.
- Install the driver of CH340, open the software (Minimu.exe), the connection succeeds after auto-search finishes
Config Menu
The motion changing of the sensor will show on the data curve in real-time.
Much easier and convenient for data collection and application.
- The data can be recorded by simply click the “record” button.
- Able to record and export the data to TXT format, offering you a clear data-changing track.
Config Menu
Compared with traditional acceleration sensors, by simply changing its setting on software, various kinds of the configuration of the WitMotion sensor can be easily done. Configuring the device enables the customer to address a broad variety of use cases by applying the sensor data filtered by WITMOTION algorithms. It is recommended to proceed calibration if there is data drift.
- Acceleration calibration
- Magnetic field calibration (Visualization user interface and easier to review )
- Algorithm swift freely: easily change to 6-axis algorithm if there is strong magnetic field interference
- Output rate, bandwidth setting( sensitivity adjustable ), measurement range selectable, placement Direction, and more
Android App
WT901 supports serial connection with Android smartphones.
Search WitMotion on Google Play Store and install the APP.
Easy to set-up: wiring connection with the device, simply chooses the 9-axis Series, select the corresponding com port and baud rate, start using.
Please click the model you bought, you can find the User Manual & PC software & APP & sample code & AD package by yourself. The tutorial website will be offered on the instruction card and product link
Configurations
Compared with other sensors, by simply click the button on APP, various kinds of the configuration of the WitMotion sensor can be easily done.
- Acceleration calibration
- Magnetic field calibration
- Output rate setting
- Range selectable and more.
Data Curve
The standard Android APP’s new features would be its data graph display.
The motion changing of the sensor will show on the data curve in real-time.
INSTALLATION: Download and unzip the tutorial. Quickly and easily set up your sensors using the step-by-step guide on the manual or video.
Powerful data storage and export function
All data can be recorded by simply click the “record” button.
Able to record and export the data to TXT format, offering you a clear data-changing track and you can manipulate it whatever you want!
For data analysis please refer to the Chapter Data Format of the datasheet.
There will be a complete communication protocol provided on the datasheet.
Android APP
Config Menu
Real-time Data Viewing
Recorded Data
About WITMOTION
Established in 2014, WitMotion Team aims to become a professional manufacturer in attitude sensors, AHRS IMU. Foud out more here in our Witmotion Brand Store .
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
Research and Development Facilities:
- 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 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
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