9DoF Sensor Stick Hookup Guide

Contributors: Alex the Giant

Hardware Overview

Let's go over the 9DoF Sensor Stick in detail.

LSM9DS1 Details:

• 3 acceleration channels, 3 angular rate channels, 3 magnetic field channels
• ±2/±4/±8/±16 g linear acceleration full scale
• ±4/±8/±12/±16 gauss magnetic full scale
• ±245/±500/±2000 dps angular rate full scale
• I²C serial interface
• Operating Voltage: 3.3V

Pull-up Resistors

This breakout board has built-in 4.7 kΩ pull up resistors for I²C communications. If you're hooking up multiple I²C devices on the same bus, you may want to disable/enable the pull-up resistors for one or more boards. On the 9DoF Sensor Stick, the pull-ups are enabled by default. To disable them, simply use a hobby knife to cut the traces connecting the left and right pads of the jumper labeled I2C PU on the back of the board. This will disconnect the resistors on the I²C bus from VCC.

Changing I²C Addresses

If you're using multiple Sensor Sticks, or have a device that's already using the default addresses of the Sensor Stick, you'll want to change addresses to avoid having multiple devices try to talk over one another. The default address for the magnetometer is 0x1E and the default address for the accelerometer and gyroscope is 0x6B. To change the addresses, you'll want to use a hobby knife to cut the trace between center and top pads and use solder to short the center and bottom pads. This will change the address of the magnetometer to 0x1C and the accelerometer and gyroscope to 0x6A.