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Accelerometer Gyro Compass Pressure Sensor Module GY-91 (MPU9250 + BMP280)

Accelerometer Gyro Compass Pressure Sensor Module GY-91 (MPU9250 + BMP280)

The GY-91 module combines two powerful sensors — the MPU-9250 (9-axis IMU) and the BMP280 (barometric pressure and temperature sensor) — into a compact, multi-functional board. It offers full motion tracking and environmental sensing in a single solution. Ideal for applications like drones, robotics, wearable devices, and IoT systems, the GY-91 provides reliable data on orientation, movement, altitude, and weather conditions.

Package Includes:

  • 1 x GY-91 Sensor Module (MPU-9250 + BMP280)
  • 1 x Set of Male Header Pins

57.00 AED 57.00 AED Tax Included
57.00 AED Tax Included

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MPU-9250 – 9-Axis Motion Sensor:

  • 3-Axis Gyroscope:
    • User-selectable range: ±250, ±500, ±1000, ±2000 °/s
    • 16-bit ADC for precise rotation sensing
    • Low power: 3.2mA operating, 8μA sleep mode
  • 3-Axis Accelerometer:
    • Selectable range: ±2g, ±4g, ±8g, ±16g
    • 450μA normal operation, 8.4μA low-power mode
    • Wake-on-motion interrupt support
  • 3-Axis Magnetometer:
    • Resolution: 14-bit (0.6μT/LSB)
    • Range: ±4800μT
    • Power: 280μA @ 8Hz
  • Integrated temperature sensor
  • Shock resistance up to 10,000g
  • Supports I²C (400kHz) and SPI (up to 20MHz)

BMP280 – Pressure and Temperature Sensor:

  • Pressure range: 300 – 1100 hPa
  • Accuracy: ±1 hPa (pressure), ±1 °C (temperature)
  • Altitude accuracy: ±1 meter
  • Power consumption: 2.7μA @ 1Hz sampling
  • Supports I²C (up to 3.4MHz) and SPI (up to 10MHz)

Specifications:

Parameter Value
Power Supply 3V or 5V DC
Interfaces I²C and SPI
Dimensions 3 × 3 × 1 mm (chip), compact module size
Temperature Range -40°C to +85°C
Current Consumption 2.7μA (BMP280), 450μA (MPU-9250 accelerometer)

Pinout:

Pin Description
VIN Power supply input (5V)
GND Ground
3V3 3.3V power input (if used with 3.3V systems)
SCL I²C Clock / SPI Clock
SDA I²C Data / SPI MOSI
SAO/SDO I²C address selection / SPI MISO
NCS Chip Select for MPU-9250
CSB Chip Select for BMP280

Applications:

  • Drones and UAVs – orientation, altitude, and stabilization
  • Robotics – motion, heading, and environmental data
  • IoT devices – pressure, temperature, and movement monitoring
  • Wearables – step tracking, motion analysis
  • Weather stations – temperature and atmospheric pressure sensing

Library and Resources:

  • Compatible with Adafruit MPU9250, Adafruit BMP280, and RTIMULib libraries
  • Available on GitHub or Arduino Library Manager

Example Arduino I²C Wiring:

  • VIN → 5V
  • GND → GND
  • SCL → A5
  • SDA → A4

Sample Arduino Code:


#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BMP280.h>
#include <MPU9250.h>

Adafruit_BMP280 bmp;
MPU9250 imu(Wire, 0x68);

void setup() {
  Serial.begin(115200);
  Wire.begin();

  if (!bmp.begin()) {
    Serial.println("BMP280 not detected!");
    while (1);
  }

  if (imu.begin() != 0) {
    Serial.println("MPU9250 init failed!");
    while (1);
  }

  Serial.println("GY-91 Initialized");
}

void loop() {
  imu.readSensor();

  Serial.print("Accel X: "); Serial.print(imu.getAccelX_mss());
  Serial.print(" | Y: "); Serial.print(imu.getAccelY_mss());
  Serial.print(" | Z: "); Serial.println(imu.getAccelZ_mss());

  Serial.print("Temp: "); Serial.print(bmp.readTemperature());
  Serial.print(" °C | Pressure: "); Serial.print(bmp.readPressure());
  Serial.println(" Pa");

  delay(500);
}