(Reference) Accelerometer ADXL345

Accelerometer ADXL345

Wiring

Sensor	Photon 2	Function
GND	GND	Ground
VCC	3V3	Power (requires 3.3v)
CS	3V3	Power (requires 3.3v)
SDO	GND	Ground
SDA	SDA	I2C data (no resistors needed)
SCL	SCL	I2C clock (no resistors needed)
INT1	Any GPIO Pin	Optional (if using interrupts)
INT2	Any GPIO Pin	Optional (if using interrupts)

Wiring Diagram

Operation

ADXL345_Sparkfun_Particle Library

• Initialize accelerometer object

ADXL345 adxl; 		//accelerometer object

void setup() {
  accel.powerOn(); // Power on the ADXL345

• There are other additional settings to configure tap, etc.
• These can be found in the example files in the library

Library Operations

• Recommended library for Photon 2

  • ADXL345_Sparkfun_Particle

• Check for vibrations

  • accel.readTap() greater than 0 is a vibration

• Measure acceleration

  • accel.cx int value for force of gravity in the X direction

  • accel.cy int value for force of gravity in the Y direction

  • accel.cz int value for force of gravity in the Z direction

Credit

• Sparkfun
• Sensor Datasheet
• Accelerometers, Gyros, IMUs
• Diagrams created with Frizting