What is it?

This breakout board a dual LSM9DS1 IMU (Triple axis Accelerometer, Gyroscope and Magnetometer) sensor board. Both sensors are configured as I2C devices, and by taking advantage of the settable LSB of the address, each IMU has a unique I2C address. The board is powered by 3.3V and all the data pins are 5v tolerant. In addition to the I2C lines all three interrupts for both IMU have been broken out. The PCB is 24.5 x 17 mm in size and comes with 10 straight header pins. The centre of each IMU is approximately 10mm apart
All boards at this point are hand soldered and have been individually tested before shipping.

Why did you make it?

We've been interested in using sensors (such as IMUs) for robotic positioning and have been experimenting with using two IMUs together to create data with less noise. By putting both IMU close together on a very small PCB we can determine noise characteristics for both IC. The Sensor data can be fused together simply by averaging values from both, or you can imply more complicated tactics such as Kalman filtering.

What makes it special?

Sensor fusing is a very good way of improving the accuracy of sensor data. By using two IMUs we believe data can be improved further. By putting two of the IMUs on the same board we can also reduce cost and overall size.

There are several Arduino libraries available for this IMU

Sparkfun

Adafruit

We also have a modified Sparkfun Library designed to work with Wiringpi's I2C library for the RasPi and some test code designed to work with the KFilter Library to test fusing data with a kalman filter Here

KFilter Library