MPU-9250 features three 16-bit analog-to-digital converters (ADCs) for digitizing the gyroscope outputs, three 16-bit ADCs for digitizing the accelerometer outputs, and three 16-bit ADCs for digitizing the magnetometer outputs. it consists of a 3-axis gyroscope, a 3-axis accelerometer, and the 3-axis Magnetometer.

and the BMP280 sensor is an environmental sensor with temperature, barometric pressure, with ±1 hPa absolute accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter accuracy

Specifications of the MPU-9250 9-Axis:

1. 3-axis Gyroscope Features

• Digital-output X-, Y-, and Z-Axis angular rate sensors (gyroscopes) with a user-programmable full-scale range of ±250, ±500, ±1000, and ±2000°/secand integrated 16-bit ADCs
• Digitally-programmable low-pass filter
• Gyroscope operating current: 3.2mA
• Sleep mode current: 8μA
• Factory calibrated sensitivity scale factor
• Self-test

2. 3-axis Accelerometer Features

• Digital-output triple-axis accelerometer with a programmable full-scale range of ±2g, ±4g, ±8gand ±16gand integrated 16-bit ADCs
• Accelerometer normal operating current: 450μA
• Low power accelerometer mode current: 8.4μA at 0.98Hz, 19.8μA at 31.25Hz
• Sleep mode current: 8μA
• User-programmable interrupts
• Wake-on-motion interrupt for low power operation of applications processor
• Self-test

3. 3-axis Magnetometer Features

• 3-axis silicon monolithic Hall-effect magnetic sensor with magnetic concentrator
• Wide dynamic measurement range and high resolution with lower current consumption.
• Output data resolution of 14 bit (0.6μT/LSB)
• The full-scale measurement range is ±4800μT
• Magnetometer normal operating current: 280μA at 8Hz repetition rate
• Self-test function with the internal magnetic source to confirm magnetic sensor operation on end products

4. Additional Features

• Auxiliarymaster I2C bus for reading data from external sensors(e.g. pressure sensor)
• Digital-output temperature sensor
• VDD supply voltage range of 2.4–3.6V
• VDDIO reference voltage for auxiliary I2C devices
• Smallest and thinnest QFNpackage for portable devices:3x3x1mm
• Minimal Cross-axis sensitivity between the accelerometer, gyroscope and magnetometer axes
• 512byte FIFO buffer enables the applications processor to read the data in bursts
• 10,000gshock tolerant
• 400kHz Fast Mode I2C for communicating with all registers
• 1MHz SPI serial interface for communicating with all registers
• 20MHz SPI serial interface for reading sensor and interrupt registers
• MEMS structure hermetically sealed and bonded at the wafer level

 Specifications of the BMP280 :

• Power supply: 3V/3.3V DC
• Peak current: 1.12mA
• Air pressure range: 300-1100hPa (equi. to +9000…-500m above sea level)
• Temperature range: -40 … +85 °C
• Digital interfaces: I²C (up to 3.4 MHz) and SPI (3 and 4 wire, up to 10 MHz)
• Current consumption of sensor BMP280: 2.7µA @ 1 Hz sampling rate

Download the Arduino Library for the GY-91 Module:

Click Here to Download