WitMotion HWT101 MEMS Tilt Angle Sensor Module (Crystal Gyro) Z-Axis Yaw, Serial/IIC, 0.1~500Hz, IP67

Overview

WitMotion HWT101 is a MEMS tilt angle sensor module with a built-in highly-integrated crystal gyro, designed for measuring yaw (Z-axis) angle output. It supports Serial (TTL) and IIC communication, provides adjustable output rate, and is suitable for integration into embedded control and monitoring systems.

Key Features

• Yaw (Z-axis) measuring sensor; output content includes time and angle of Z-axis.
• Return rate: 0.1~500Hz (flexibly changeable).
• Accuracy: static precision 0.05°, dynamic accuracy 0.1°.
• Angle range: ±180°.
• Interfaces: Serial / IIC (I2C max rate 400K).
• Baud rate: 2400~921600.
• In-built Kalman filtering algorithm.
• Supports connection with NMEA-0183 GPS to form a GPS IMU unit.
• Operating temperature noted: -40°C to 85°C.
• Processor notes: high-performance Cortex-M0 chip (up to 48MHz) and LDO power chip for stable supply.
• IP67 waterproof (as stated by the manufacturer).

For pre-sales and after-sales assistance, reach the store team at https://voltaspir.com/ or email [email protected].

Specifications

Brand	WitMotion
Model	HWT101
Package	Surface Amount
Communication level	Serial/IIC
Supply voltage	3.3-5V (note: cannot over 5V power)
Current	<10mA
Consumption	<25mA
Return rate	0.1~500Hz
Weight	0.32g
Angle range	±180°
Accuracy	Static precision 0.05°; dynamic accuracy 0.1°
Baud rate	2400~921600
IIC (I2C) max rate	400K
Output content	Time, angle of Z-axis
Port	0~3 (support extension)
Pad pitch	Up/down 100mil (2.54mm); Left/Right 600mil (15.24mm)
Module size	15.24 x 15.24 x 3.3mm
Mechanical drawing (units: mm)	A=15.24, B=15.24, C=2.54, D=12.7, E=3.3

Pin Definition

No.	Definition	Function
1	D0	/
2	VCC	3.3V-5V
3	RX	Serial data input, TTL
4	TX	Serial data output, TTL
5	GND	Ground
6	D1	Hardware calibration
7	D2	/
8	VCC	3.3V-5V
9	SCL	IIC time line
10	SDA	IIC signal line
11	GND	Ground
12	D3	/

Integration Notes

• IIC bus is open-drain output. When connected to an MCU, the IIC bus needs to be pulled up to VCC through a 4.7K resistor.

Applications

• IoT applications
• Environmental monitoring
• UGV platforms
• Energy systems
• Mapping
• Building protection
• Industrial agriculture and intelligent machinery
• Smart equipment and smart home

PC Software / Data Tools

• PC software and sample code are provided for second-development (as stated by the manufacturer).
• Functions shown include data graph display (dynamic angle testing), data testing, data records saved in .TXT format, and raw data view (unfiltered).

What's Included

• 1 x HWT101 crystal gyroscope sensor (for Z-axis measuring only)
• 2 x 6-pin male header (1x6)
• 1 x instruction card (tutorial website printed on the card)

Warranty

• 12-month warranty (as stated by the manufacturer)

Details

Built for embedded angle and motion monitoring, the HWT101 platform fits common IoT, robotics, mapping, and energy-system integrations.

Key electrical and interface specs at a glance for faster integration planning.

Yaw (Z-axis) angle output with adjustable update rate and onboard filtering for stable readings.

Detailed operating parameters, including angle range, accuracy, update rate, and supported communications.

Compact 15.24 × 15.24 mm footprint with pad layout details for PCB design and mounting clearance.

Serial (TTL) connection pins keep MCU wiring straightforward for UART-based projects.

For I2C setups, add pull-ups on SCL/SDA as required for the module’s open-drain bus output.

Pinout reference for wiring power, UART, I2C, and hardware calibration connections.

Onboard processing and power regulation support stable data return in compact embedded builds.

Typical deployment examples include industrial agriculture, smart devices, and equipment monitoring.

Optional PC tools help visualize live angle traces during setup, tuning, and validation.

Live data panels present multiple fields for quick verification during bench testing.

Exportable TXT logs make it easier to capture test runs and compare results over time.

Raw (unfiltered) output view is available for developers who prefer to post-process sensor data.

Manufacturer-provided documentation is included for reference and project compliance paperwork.