Using this Library, you have the option of using either SPI or I2C to communicate with the ADXL345. It is fairly reasonable to use and straight forward. You will also be able to calibrate the ADXL345 ...
AD5674: 12-bit resolution with external voltage reference AD5674R: 12-bit resolution AD5679: 16-bit resolution with external voltage reference AD5679R: 16-bit resolution The library defines a class ...