JY901S / JY901B 9‑Axis Attitude Angle Sensor Module (IIC) — Accelerometer, Gyroscope, Magnetometer A compact, readytouse 9‑axis sensor module that combines accelerometer, gyroscope and magnetic field sensing to deliver real‑time attitude (pitch, roll, yaw) and motion data. The JY901B variant uses the MPU‑9250 IMU, providing industry‑standard 9‑axis sensing. The IIC (I2C) interface makes integration straightforward with common microcontrollers and single‑board computers. Key benefits Fast integration: IIC (I2C) interface and standard signal outputs let you connect the module quickly to development boards with minimal wiring. Ready attitude information: Provides attitude angle outputs alongside raw sensor data so you can focus on control, navigation, or logging rather than low‑level sensor fusion. All‑in‑one sensing: Combines accelerometer, gyroscope and magnetometer in a single module to reduce BOM, board space and wiring complexity. Reliable motion tracking: 9‑axis sensing improves orientation accuracy and stability compared with single‑ or dual‑axis approaches. What it does (functionality) Measures linear acceleration, angular velocity and magnetic field. Supplies attitude information (pitch, roll, yaw) derived from the sensor suite. Communicates over IIC (I2C) for read/write access to sensor registers and attitude outputs. JY901B implements the MPU‑9250 IMU chip for 9‑axis sensing and established driver support. Key attributes Models: JY901S and JY901B (JY901B uses MPU‑9250). Sensors: 3‑axis accelerometer, 3‑axis gyroscope, 3‑axis magnetometer (9‑axis total). Interface: IIC (I2C) for easy connection to microcontrollers and SBCs. Form: Compact PCB module, lightweight and suitable for prototyping or embedded use. Compatibility: Works with standard I2C stacks and commonly used platforms (Arduino, STM32, Raspberry Pi and other microcontrollers that support I2C). Outputs: Raw sensor data and attitude angles for direct use in control and navigation algorithms. Typical applications UAVs and multirotors: Use the module for flight stabilization, heading control and attitude estimation to improve stability and responsiveness. Mobile robotics and balance control: Provide orientation and motion feedback for robot navigation, gimbals, self‑balancing platforms and motor control. Motion tracking and portable devices: Integrate into human/machine interfaces, gesture detection, and data‑logging applications that require compact 9‑axis sensing. Integration notes and tips Connect via the module's IIC pins (SDA/SCL) plus power (VCC/GND). Use pull‑ups on the I2C lines if your host board does not provide them. Use available MPU‑9250 drivers or standard I2C libraries to read raw sensor registers and attitude outputs. JY901B's MPU‑9250 is widely supported by open‑source drivers and examples. Calibrate magnetometer and accelerometer/gyro as part of your system setup to maximize heading accuracy and reduce drift. Why choose this module Combines all three inertial sensor types in one compact board for faster development and fewer integration headaches. IIC interface and MPU‑9250 support (for JY901B) ensure broad compatibility with development platforms and community resources. Suitable for both prototyping and embedded applications where reliable 9‑axis attitude sensing is required. Package includes One JY901 series 9‑axis attitude angle sensor module (model as ordered: JY901S or JY901B with MPU‑9250). For developers and integrators who need a compact, easy‑to‑connect 9‑axis module that delivers both raw sensor data and attitude angles, the JY901S / JY901B series provides a practical, reliable solution.