Adafruit 9-DOF LSM9DS1 Breakout Board - STEMMA QT / Qwiic

Add motion, direction, and orientation sensing to your project with this all-in-one 9-DOF sensor that is STEMMA QT ready for easy plug-n-play usage. Inside the chip are three sensors, one is a classic 3-axis accelerometer, which can tell you which direction is down towards the Earth (by measuring gravity) or how fast the board is accelerating in 3D space. The other is a 3-axis magnetometer that can sense where the strongest magnetic force is coming from, generally used to detect magnetic north. The third is a 3-axis gyroscope that can measure spin and twist. By combining this data you can REALLY orient yourself!

To know more about STEMMA QT, watch this video:

Here are the key LSM9DS1 specifications:

• Accelerometer range is ±2/±4/±8/±16 g
• Magnetometer range is ±4/±8/±12/±16 gauss
• Gyroscope range is ±245/±500/±2000 dps ranges.

To make getting started fast and easy, we placed the sensors on a compact breakout board with voltage regulation and level-shifted inputs. That way you can use them with 3V or 5V power/logic devices without worry. To make usage simple, we expose both the SPI and I2C interface and some interrupt pins from each chip. The breakout comes fully assembled and tested, with some extra header so you can use it on a breadboard. Two mounting holes make for a secure connection.

Pinouts:

• Power Pins
  The sensor on the breakout requires 3V power. Since 5V microcontrollers like Arduino are vastly used, we tossed a 3.3V regulator on the board. Its ultra-low dropout so you can power it from 3.3V-5V just fine.
  • Vin - this is the power pin. Since the chip uses 3 VDC, we have included a voltage regulator on board that will take 3-5VDC and safely convert it down. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V micro like Arduino, use 5V
  • 3V3 - this is the 3.3V output from the voltage regulator, you can grab up to 100mA from this if you like
  • GND - common ground for power and logic
  • I2C Pins
  • SCL - I2C clock pin, connect to your microcontrollers I2C clock line. This pin is level shifted so you can use 3-5V logic, and there's a 10K pullup on this pin.
  • SDA - I2C data pin, connect to your microcontrollers I2C data line. This pin is level shifted so you can use 3-5V logic, and there's a 10K pullup on this pin.
• SPI Pins
  • SCL - this is also the SPI clock pin, it's level shifted so you can use 3-5V logic input
  • SDA - this is also the SPI MOSI pin, it's level shifted so you can use 3-5V logic input
  • CSAG - this is the Accelerometer+Gyro subchip Chip Select, it's level shifted so you can use 3-5V logic input
  • CSM - this is the Magnetometer subchip Select, it's level shifted so you can use 3-5V logic input
  • SDOAG - this is the Accelerometer+Gyro subchip MISO pin - it's 3V logic out, but can be read properly by 5V logic chips.
  • SDOM/DOM- this is the Magnetometer subchip MISO pin - it's 3V logic out, but can be read properly by 5V logic chips.
• Interrupt & Misc Pins
  • DEN - this is a pin that supposedly could be used to dynamically enable/disable the Gyro. There's actually no documentation on it but we break it out for you anyways.
  • INT1 & INT2 - These are interrupts from the accelerometer/gyro subchip. We don't have specific library support for these so check the datasheet for what you can make these indicate. They are 3V-logic outputs
  • DRDY - this is the accelerometer/gyro subchip data ready output. We don't have specific library support for these so check the datasheet for how you can set the registers to enable this pin. It is a 3V-logic output.
  • INTM - This is the interrupt from the magnetometer subchip. We don't have specific library support for it so check the datasheet for what you can make it indicate. It is a 3V-logic output.

• LSM9DS1 specifications:
  • Accelerometer range is ±2/±4/±8/±16 g
  • Magnetometer range is ±4/±8/±12/±16 gauss
  • Gyroscope range is ±245/±500/±2000 dps ranges.
• Communicates via I2C and SPI
• Comes with SparkFun Qwiic compatible STEMMA QT JST SH connectors

• 1 x Adafruit 9-DOF LSM9DS1 Breakout Board - STEMMA QT / Qwiic
• 1 x Header pin

• Adafruit 9-DOF LSM9DS1 Breakout Board - STEMMA QT / Qwiic product overview
• Adafruit Arduino code, for use with Arduino boards
• Adafruit Python & CircuitPython code, for use with computers or single-board Linux boards