Tutorial Link

For instructions and demonstrations, please refer to the following links:

• Google Drive
• WITMOTION Youtube Channel

If you encounter technical difficulties or cannot find the necessary information in the provided documents, please contact the WITMOTION support team. Their engineering team is dedicated to offering the required support to ensure your success with WITMOTION AHRS sensors.

Contact

Technical Support Contact Info

Application

The HWT906 sensor is applicable in various fields, including:

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

Contents

This document provides the following sections:

1. Introduction
2. Warning Statement
3. Use Instructions
4. Software Introduction
5. MCU Connection

1 Introduction

The HWT906 is a multi-sensor device capable of detecting acceleration, angular velocity, angle, and magnetic field. Its robust housing and compact size make it ideal for industrial retrofit applications such as condition monitoring and predictive maintenance. The device can be configured to interpret sensor data using smart algorithms for a wide range of use cases.

The HWT906 is scientifically known as an AHRS IMU sensor. It measures 3-axis angle, angular velocity, acceleration, and magnetic field. Its primary strength lies in its algorithm, which accurately calculates the three-axis angle.

Advantages over competing sensors:

• Heated for best data availability: Features a new WITMOTION patented zero-bias automatic detection calibration algorithm that surpasses traditional accelerometer sensors.
• High precision output: Provides Roll, Pitch, Yaw (X Y Z axis) data, along with Acceleration, Angular Velocity, Angle, and Magnetic Field output.
• Low cost of ownership: Offers remote diagnostics and lifetime technical support from the WITMOTION service team.
• Comprehensive development resources: Includes tutorials, manuals, datasheets, demo videos, free software for Windows, an Android app, and sample code for MCU integration (51 serial, STM32, Arduino, Matlab, Raspberry Pi), along with communication protocols for project development.
• Industry recognition: WITMOTION sensors are highly regarded by thousands of engineers as a recommended attitude measurement solution.

2 Warning Statement

• Applying more than 5 Volts across the sensor wiring from the main power supply can cause permanent damage to the sensor.
• Connecting VCC directly to GND will result in the burning of the circuit board.
• For proper instrument grounding, use WITMOTION with its original factory-made cable or accessories.
• For secondary development projects or integration, use WITMOTION with its compiled sample code.

3 Use Instructions

Access the document or download center via the provided hyperlinks:

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

4 Software Introduction

Software function introduction

(Ps. You can check the functions of the software menu from the link.)

A screenshot of the WITMOTION software interface is displayed, showing real-time sensor data including Angle X, Angle Y, and Angle Z with their respective values. The software includes features for device connection, language configuration, tools, recording, and viewing data through various interfaces like Main interface, Data list, Graph, Map, 3D pose, and Raw data.

SOFTWARE INSTRUCTIONS

PC Software Download:

• How to download software and driver: 1
• Install Driver: 1

Contents

1 Use Instructions with PC

• 1.1 Connect with wiring sensor: 4
• 1.2 Connecting with Bluetooth Sensor: 11
• 1.2.1 Select Sensor Model: 11
• 1.2.2 Search Device: 11

2 Main Menu: 13

• 2.1 Function configuration: 13
• 2.1.1 Record: 13
• 2.1.2 Data playback: 15
• 2.1.3 Tools: 15
• 2.1.4 View: 15
• 2.1.5 Help: 15
• 2.1.6 Language: 15
• 2.1.7 Configuration: 15
• 2.2 Data Review: 17
• 2.2.1 Main Interface: 17
• 2.2.2 Curve Display: 17
• 2.2.3 Map Function: 18
• 2.2.4 3D Demo: 19
• 2.2.5 Raw data: 20

3. Configuration: 21

• 3.1 Read sensor configuration: 21
• 3.2 System settings: 22
• 3.2.1 Reset: 22
• 3.2.2 Sleep and disable sleep: 23
• 3.2.3 Alarm setting: 24

5 MCU Connection

To connect the test board to the module and subsequently to a computer, a Type-C port and a pin header port are provided for easy connection. Install the HWT906 into the test board slot.

The connection diagram for the test version and the module is as follows:

A diagram shows the physical appearance of the test board with various components labeled.

Step 1. Connect the sensor with a serial converter

PIN Connection:

• VCC - 5V
• RX - TX
• TX - RX
• GND - GND

(When connecting with a computer, VCC-5V is recommended.)

A diagram illustrates the TTL PIN Definition with color-coded wires (RED for VCC 5V, YELLOW for TX, GREEN for RX, BLACK for GND) connecting a computer, a serial converter, and the sensor. The connections are clearly mapped: VCC to VCC, TX to RX, RX to TX, and GND to GND.