LSM9DS1 Breakout Hookup Guide

Contributors: jimblom
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Hardware Hookup

The LSM9DS1 will work over either I2C or SPI. Here are some example wiring diagrams, demonstrating how to wire up each interface.

I2C Hardware Hookup

Out-of-the-box, the board is configured for an I2C interface, as such we recommend using this hookup if you're otherwise agnostic. All you need is four wires!

Arduino I2C Fritzing Circuit

Connecting the LSM9DS1 to a RedBoard via I2C.

This hookup relies on all of the jumpers on the back of the board being set (as they should be, unless they've been sliced). If the jumpers have been cut, connect all four CS and SDO pins to 3.3V.

No level shifters even though the Arduino's I/O pins are 5V? Well, I2C is a funny interface: pins aren't directly pulled high by a GPIO, instead an open-drain MOSFET relies on pull-up resistors to create a logic high. Because the breakout board pull-up resistors are stronger (less resistance) than the Arduino's internal pull-ups, the voltage on the logic pins will be much closer to 3.3V (though a little higher) than 5V -- within a tolerable range. Just make sure you power the breakout off of the Arduino's 3.3V power rail!

SPI Hardware Hookup

For the SPI hookup, we'll use the Arduino's hardware SPI pins -- 11 (MOSI), 12 (MISO), and 13 (SCLK) -- in addition to two digital pins of your choice (for the chip selects).

3.3V Arduino w/ SPI

If you're using a 3.3V Arduino, like the 3.3V/8MHz Pro Mini, you can hook the microcontroller pins directly up to the LSM9DS1.

Arduino Pro Mini 3.3V LSM9DS1 Fritzing Circuit

5V Arduino w/ SPI

If you're using a 5V Arduino, you'll also need to grab a level shifter to keep the SPI signals within the tolerable voltage range. You could use the SparkFun Bi-Directional Logic Level Converter for example:

5V Arduino Logic Level Converter and LSM9DS1 SPI Fritzing Circuit

(Unless you enjoy wire-tangles, the I2C or 3.3V SPI hookups are recommended.)