GY-85 9-Axis IMU Gyroscope Accelerometer Magnetometer ITG3200/ITG3205 ADXL345 HMC5883L BMP085

Description

What it is

The GY-85 IMU 9-axis is a multi-sensor that integrates gyroscope, accelerometer, and magnetometer. This device combines the functionalities of three sensors into one for easy measurement of acceleration, rotation, and Earth’s magnetic field.

Features

• Gyroscope ITG-3205 (check the datasheet)
• Accelerometer ADXL345 (check the datasheet)
• Magnetometer HMC5883L (check the datasheet)
• Pressure Sensor BMP085 (check the datasheet)

What it is for

Ideal for robotics, drones, and orientation systems projects. The GY-85 is compatible with Arduino and ESP32/ESP8266.

Tutorial: How to use GY-85

The GY-85 is a multi-axis sensor that measures acceleration, gyroscope, and magnetometer. Ideal for movement and orientation projects.

What you need

• Arduino UNO or compatible
• Dupont cable
• 10kΩ resistor

Steps

1. 1. Installation: Download the I2C driver for Arduino.
2. 2. Connection: Connect GY-85 to Arduino via Dupont cable.
3. 3. Configuration: Use Wire.h to configure the sensors.
4. 4. Code: Insert the code to initialize the sensors.
5. 5. Test: Verify the output data with Serial Monitor.
6. 6. Calibration: Calibrate the magnetometer to improve accuracy.
7. 7. Usage: Integrate the data into your motion projects.
8. 8. Debug: Check the datasheet if necessary.

Example code

```cpp
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BMP085_U.h>
#include <Adafruit_BNO055.h>

Adafruit_BNO055 bno = Adafruit_BNO055();

void setup() {
  Serial.begin(9600);
  if (!bno.begin()) {
    Serial.println("No BNO055 detectedn");
    while (1) {
      delay(100);
    }
  }
  Serial.println("BNO055 sensor initializedn");
}

void loop() {
  sensors_event_t a, g, temp;
  bno.getEvent(&a, &g, &temp);
  Serial.print("X:"); Serial.print(a.acceleration.x);
  Serial.print(" Y:"); Serial.print(a.acceleration.y);
  Serial.print(" Z:"); Serial.println(a.acceleration.z);
}
```

Mini project

Create a 3D orientation project using the magnetometer and gyroscope data.

Common mistakes

• Do not calibrate the magnetometer.
• Forget to check the data on the datasheet.
• Incorrectly connect the pins.
• Incorrect use of I2C drivers.

Recommended accessories

• Arduino UNO
• Dupont cable
• 10kΩ resistor

Frequently asked questions

How to calibrate the magnetometer?
Run calibrate_magnetometer() in a dedicated loop.

What data is available?
Acceleration, gyroscope, and temperature events.

Why use I2C?
For efficient communication between Arduino and GY-85.