watchButton.js

watchButton.js

const awsIot = require('aws-iot-device-sdk');
const _ = require('lodash');
const rpio = require('rpio');
const BUTTON_PIN = 40;
const PORT = 8883;
const TEAM_NUMBER = 1;
const PUSH_BUTTON = 1;
// const KEY_SWITCH = 2;

let device = awsIot.device({
  host: "ao6epnv875g5b.iot.us-east-1.amazonaws.com",
  clientId:    "pi_arya",
  caPath: "certs/root-CA.crt",
  certPath: "certs/0e238d771c-certificate.pem.crt",
  keyPath: "certs/0e238d771c-private.pem.key",
  region:    "us-east-1",
  port:    PORT
});

device.on('connect', function() {
    console.log('connected');
    rpio.open(BUTTON_PIN, rpio.INPUT, rpio.PULL_UP);
    rpio.poll(BUTTON_PIN, _.debounce(watchButtonPress,1000), rpio.POLL_LOW);
});

function getShadowUpdate(desiredObject) {
  return JSON.stringify({
    state: {
      desired: desiredObject
    }
  });
}

function watchButtonPress(pin) {
  var buttonPress = {
    team: TEAM_NUMBER,
    type: PUSH_BUTTON,
    timestamp: +new Date()
  };
  console.log('PUBLISH', buttonPress);
  device.publish('$aws/things/pi_arya/shadow/update', getShadowUpdate(buttonPress));
}