** ITEM DISCONTINUED BY THE MANUFACTURER **

NOTE: Some modules are known to have a non-functioning magnetometer. In such cases, please use a separate magnetometer module such as the one below.

HSCDTD008A 3 Axis Compass Magnetometer Module

The MPU9250 is a high-performance 9-axis motion tracking sensor that integrates a 3-axis accelerometer, 3-axis gyroscope, and 3-axis magnetometer into a single compact package. Designed for embedded systems, robotics, and wearable applications, it offers precise inertial measurements and supports I2C and SPI communication protocols.

Specifications

• Sensor Type: 9-DOF MEMS motion tracking
• Accelerometer Range: Plus or minus 2g, 4g, 8g, 16g
• Gyroscope Range: Plus or minus 250, 500, 1000, 2000 degrees per second
• Magnetometer Range: Plus or minus 4800 micro-Teslas
• Accelerometer Resolution: 16384 LSB/g (at plus or minus 2g)
• Gyroscope Resolution: 131 LSB/degree/second (at plus or minus 250 degrees per second)
• Magnetometer Resolution: 0.6 micro-Teslas/LSB
• Interface: I2C (up to 400 kHz), SPI (up to 20 MHz)
• I2C Address: 0x68 (default), 0x69 (if AD0 pin is pulled high)
• Supply Voltage: 3.3V via onboard LDO (accepts 4.4V to 6.5V inputs safely)
• Temperature Sensor: Integrated onboard

Interface and Pinout Guide

• VCC: 4.4V to 6.5V Power Input (Onboard regulator provides 3.3V to the sensor)
• GND: Ground Reference
• SCL / SCLK: I2C Serial Clock / SPI Clock
• SDA / SDI: I2C Serial Data / SPI Master Out Slave In (MOSI)
• EDA: Auxiliary I2C Serial Data (for connecting external non-inertial sensors)
• ECL: Auxiliary I2C Serial Clock
• ADO / SDO: I2C Address Select / SPI Master In Slave Out (MISO)
• NCS: SPI Chip Select (Active Low, pull high for I2C mode)
• INT: Programmable Interrupt Pin

Key Features

• Complete 9-Axis Tracking: Combines an accelerometer, gyroscope, and magnetometer in one module to eliminate alignment errors common with separate boards.
• Onboard DMP: Built-in Digital Motion Processor handles complex sensor fusion calculations internally to offload processing from your microcontroller.
• Signal Stability: Includes an onboard voltage regulator to safely handle power inputs up to 6.5V.
• Integrated Resistors: Features built-in pull-up resistors on SDA, SCL, and nCS, alongside pull-down resistors on FSYNC and AD0.
• Broad Compatibility: Fully compatible with Arduino, STM32, ESP32, Raspberry Pi, and other popular microcontroller platforms.
• Versatile Use Cases: Ideal for mobile robotics, virtual reality or augmented reality input, gesture recognition systems, and motion logging devices.

Usage Tips

• Logic Level Translation Warning: While the board accepts a 5V power input via VCC, the data and clock logic pins (SDA, SCL, ADO, NCS, INT) operate strictly at 3.3V levels. If you connect this module to a development board with 5V TTL logic (such as an Arduino Uno or Mega), you must use a bidirectional logic level shifter on the communication lines. Connecting 5V logic signals directly can cause erratic readings, data corruption, or permanent damage to the sensor chip.
• Address Configuration: The default 7-bit I2C address is 0x68. If you have a second module on the same bus, connect the AD0 pin to VCC to change its address to 0x69.
• Magnetometer Mapping: The internal magnetometer is routed as a secondary device. Most standard software libraries automatically configure the auxiliary I2C bypass mode so your controller can access it directly.
• Calibration Step: To secure accurate heading data from the compass, the sensor must be calibrated in its final enclosure to cancel out local magnetic distortions caused by nearby battery packs or motor currents.
• Wiring Strain Relief: Ensure your connecting wires are flexible and securely routed, as high vibrations from robotic frames can introduce noise or cause the fragile header connections to break.

Arduino Library: MPU9250_asukiaaa

Reference tutorial: MPU9250 9-Axis Sensor Module