The board comes with all surface-mount components pre-soldered. The included header strip can be soldered on for convenient use on a breadboard or with 0.1" connectors. However, for applications subject to extreme accelerations, shock or vibration, locking connectors or direct soldering is advised.

Assembly

Position the Header

Cut the header to size if necessary. Then plug the header - long pins down - into a breadboard to stabilize it for soldering.

Add the Breakout

Align the breakout board and place it over the header pins on the breadboard.

And Solder

Be sure to solder all pins to assure good electrical contact.

I2C Wiring

The ADXL345 Breakout has an I2C address of 0x53. It can share the I2C bus with other I2C devices as long as each device has a unique address. Only 4 connections are required for I2C communication:

GND -> GND
VIN -> +5v
SDA -> SDA (Analog 4 on "Classic Arduinos")
SCL -> SCL (Analog 5 on "Classic Arduinos")

The Adafruit breakout has level shifting and regulation circuitry so you can power it from 3-5V and use 3V or 5V logic levels for I2C.

Connect SCL on the Metro to SCL (yellow wire) on the ADXL343
Connect SDA on the Metro to SDA (blue wire) in the ADXL343
Connect GND on the Metro to GND (black wire) on the ADXL343
For 3.3V LOGIC boards: connect 3.3V on the Arduino/Metro to VIN (red wire) on the ADXL343
For 5.0V LOGIC boards: Connect 5V on the Arduino/Metro to VIN (red wire) on the ADXL343