simple example to test StandardFirmataWiFi (wire an LED to pin D8 and a potentiometer to pin A0)

wifi-test.js

/*
 * Tested using node v0.12.7
 * npm install etherport-client
 * npm install firmata
 *
 * To run in Debug mode:
 * DEBUG=etherport-client node wifi-test
 */
var Firmata = require("firmata").Board;
var EtherPortClient = require("etherport-client").EtherPortClient;
var board = new Firmata(new EtherPortClient({
  host: "10.0.0.39",
  port: 3030
}));

board.on("ready", function() {
  console.log("READY!");
  console.log(
    board.firmware.name + "-" +
    board.firmware.version.major + "." +
    board.firmware.version.minor
  );

  var state = 1;
  var lastVal = 0;

  this.pinMode(8, this.MODES.OUTPUT);

  setInterval(function() {
    this.digitalWrite(8, (state ^= 1));
  }.bind(this), 500);

  this.analogRead(0, function(value) {
    if (value != lastVal) {
      console.log(value);
    }
  });
});