Arduino - GY80 GY87 GY88

Arduino cansat and IMUs

Two very common IMU boards are GY80 and GY87(and GY-88 which is component identical to GY-87).

They are both 10 DOF (degree of freedom) boards and all sensor handling is by i2c bus.

GY boards

	GY-80	GY-87	GY-88	GY-88A	GY-91
digital compass	hmc5883L	hmc5883L	hmc5883L	hmc5983	mpu9250
pressure and temperature	bmp085	1 bmp085/180	bmp085/180	bmp180	bmp280
3 axis accelerometer	adxl345	mpu6050	mpu6050	mpu6050	mpu9250
3 axis digital gyro	l3g4200d	mpu6050	mpu6050	mpu6050	mpu9250
schematics	schematics	schematics	schematics	schematics	schematics

Notes:

on the boards with MPU6050 the the hmc5883L accelerometer is located on a secundary I2C bus behind the MPU6050

See snippets code below

See full code here

#include <Wire.h>
#include <MPU6050.h>
#include <hmc5883l.h>
#include <bmp085.h>
#include "I2Cdev.h"

MPU6050 mpu;
hmc5883l compass;

int error;

void setup() {
  ...
  // 2000 degrees pr second max and +/- 16 g max
  mpu.begin(MPU6050_SCALE_2000DPS, MPU6050_RANGE_16G);

  mpu.setI2CBypassEnabled(true); // set bypass mode for gateway to hmc5883L

  // now we can reach hmc5883L
  compass = hmc5883l(); // Construct a new HMC5883 compass.
  ...

Arduino drivercode

Unzip the zip files in youe … arduinosketchbooklibraries directory See in ardunio Preferences where your sketcbook directory is located. You can find libraries directory in the sketchbook directory.

See libraries for zipfiles

NB NB NB : in some of the democode they initalise the serial port to 9600 and in some to 115200
Check it so you can adjust your arduino terminal to same speed.