USER MANUAL

Tutorial Link

• Google Drive
• Link to instructions DEMO: WITMOTION Youtube Channel
• HWT901B Playlist

If you have technical problems or cannot find the information that you need in the provided documents, please contact our support team. Our engineering team is committed to providing the required support necessary to ensure that you are successful with the operation of our AHRS sensors.

Contact

Technical Support Contact Info

Application

• AGV Truck
• Platform Stability
• Auto Safety System
• 3D Virtual Reality
• Industrial Control
• Robot
• Car Navigation
• UAV
• Truck-mounted Satellite Antenna Equipment

1 Introduction

The HWT901B is a multi-sensor device detecting acceleration, angular velocity, angle, as well as magnetic field. Its robust housing and small outline make it perfectly suitable for industrial retrofit applications such as condition monitoring and predictive maintenance. Configuring the device enables the customer to address a broad variety of use cases by interpreting the sensor data using smart algorithms.

HWT901B's scientific name is AHRS IMU sensor. A sensor measures 3-axis angle, angular velocity, acceleration, and magnetic field. Its strength lies in the algorithm which can accurately calculate the three-axis angle.

Key Advantages of HWT901B:

• Heated for best data availability: The new WITMOTION patented zero-bias automatic detection calibration algorithm outperforms traditional accelerometer sensors.
• High precision Roll Pitch Yaw (X Y Z axis) output: Provides Acceleration + Angular Velocity + Angle + Magnetic Field data.
• Low cost of ownership: Features remote diagnostics and lifetime technical support by the WITMOTION service team.
• Comprehensive development resources: Includes manual, datasheet, Demo video, free software for Windows computers, an APP for Android smartphones, and sample code for MCU integration (51 serial, STM32, Arduino, Matlab, Raspberry Pi), along with communication protocol documentation for project development.
• Industry recognition: WITMOTION sensors have been praised by thousands of engineers as a recommended attitude measurement solution.

1.1 Warning Statement

• Applying more than 5 Volts across the sensor wiring of the main power supply can lead to permanent damage to the sensor.
• VCC cannot be connected directly to GND, otherwise it will lead to the burning of the circuit board.
• For proper instrument grounding, use WITMOTION with its original factory-made cable or accessories.
• Do not access the I2C interface.
• For secondary developing projects or integration, use WITMOTION with its compiled sample code.

2 Use Instructions

Access the document or download center via the following resources:

• Software and driver download
• Quick-guide Manual
• Teaching Video
• Common Software with detailed instructions
• SDK (sample code)
• SDK Tutorial Documentation
• Communication Protocol

3 Software Introduction

Software function introduction

You can check the functions of the software menu from the provided link.

Software Usage and Configuration

The software facilitates various operations including downloading drivers, connecting to sensors (wired and Bluetooth), configuring functions like recording and data playback, reviewing data through different displays (curves, maps, 3D), and managing system settings such as reset and alarms.

4 MCU Connection