LIS2DH12 Accelerometer

The LIS2DH12 is an ultra-low-power high-performance three-axis linear accelerometer with a digital I2C/SPI serial interface.

You can use the LIS2DH12 (About Modules) module with the LIS2DH12 as follows:

SPI

SPI1.setup({miso:..., mosi:..., sck:...);
var accel = require("LIS2DH12").connectSPI(SPI1, CS_PIN, {callback:function(xyz) {
   // callback whenever data is received
   console.log(xyz);
   // prints { "x": 3.90625, "y": -7.8125, "z": 984.375 }
}});
accel.setPowerMode(on?"low":"powerdown");

I2C

I2C1.setup({sda:..., scl:...);
var accel = require("LIS2DH12").connectI2C(I2C1, {callback:function(xyz) {
   // callback whenever data is received
   console.log(xyz);
   // prints { "x": 3.90625, "y": -7.8125, "z": 984.375 }
}});
accel.setPowerMode(on?"low":"powerdown");

Note: you can supply addr to connectI2C's second argument to set an I2C address if it is non-standard.

Reference

/* Set the power state of the accelerometer. 
  Either :

  "normal" - 100Hz
  "low" - 1Hz
  "fast" - 1000Hz
  "highres" - 1000Hz
  "powerdown" - Off
*/
LIS2DH12.prototype.setPowerMode = function (mode) { ... }

/* Get the last read accelerometer readings as 
an object with {x,y,z,new} elements. new is false if the data hasn't changed since the last read
*/
LIS2DH12.prototype.getXYZ = function () { ... }

/* Call the callback with an accelerometer reading {x,y,z}. If the accelerometer is powered off,
 power it on, take a reading, and power it off again
*/
LIS2DH12.prototype.readXYZ = function (callback) { ... }

/* Initialise the LIS2DH12 module with the given SPI interface and CS pins.
  See 'LIS2DH12' above for options
*/
exports.connectSPI = function (spi, cs, options) { ... }

/* Initialise the LIS2DH12 module with the given I2C interface (and optional address with connectI2C(i2c,{addr:...}) )
See 'LIS2DH12' above for more options
*/
exports.connectI2C = function (i2c, options) { ... }