comparison: Touchiot/main.js
Touchiot/main.js
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| 1 /*jslint node:true,vars:true, unparam:true */ | |
| 2 /*jshint unused:true */ | |
| 3 | |
| 4 | |
| 5 /* | |
| 6 The Touch Notifier Node.js sample application distributed within Intel® XDK IoT Edition under the IoT with Node.js Projects project creation option showcases how to read digital data from a Grover Starter Kit Plus – IoT Intel® Edition Touch Sensor, start a web server and communicate wirelessly using WebSockets. | |
| 7 | |
| 8 MRAA - Low Level Skeleton Library for Communication on GNU/Linux platforms | |
| 9 Library in C/C++ to interface with Galileo & other Intel platforms, in a structured and sane API with port nanmes/numbering that match boards & with bindings to javascript & python. | |
| 10 | |
| 11 Steps for installing MRAA & UPM Library on Intel IoT Platform with IoTDevKit Linux* image | |
| 12 Using a ssh client: | |
| 13 1. echo "src maa-upm http://iotdk.intel.com/repos/1.1/intelgalactic" > /etc/opkg/intel-iotdk.conf | |
| 14 2. opkg update | |
| 15 3. opkg upgrade | |
| 16 | |
| 17 Article: https://software.intel.com/en-us/html5/articles/iot-touch-notifier-nodejs-and-html5-samples | |
| 18 */ | |
| 19 | |
| 20 //MRAA Library was installed on the board directly through ssh session | |
| 21 var mraa = require("mraa"); | |
| 22 var mqtt = require("mqtt"); | |
| 23 var http = require("http"); | |
| 24 | |
| 25 function setOpenhabState(txtNewState) { | |
| 26 http.get("http://192.168.42.245:8080/CMD?door_bell="+txtNewState); | |
| 27 } | |
| 28 | |
| 29 //GROVE Kit Shield D6 --> GPIO6 | |
| 30 //GROVE Kit Shield D2 --> GPIO2 | |
| 31 function startSensorWatch(socket) { | |
| 32 'use strict'; | |
| 33 var touch_sensor_value = 0, last_t_sensor_value; | |
| 34 var mqtcli = mqtt.connect('mqtt://raspeinz.local/'); | |
| 35 | |
| 36 //Touch Sensor connected to D2 connector | |
| 37 var digital_pin_D2 = new mraa.Gpio(2); | |
| 38 digital_pin_D2.dir(mraa.DIR_IN); | |
| 39 | |
| 40 //Buzzer connected to D6 connector | |
| 41 var digital_pin_D6 = new mraa.Gpio(6); | |
| 42 digital_pin_D6.dir(mraa.DIR_OUT); | |
| 43 | |
| 44 digital_pin_D6.write(0); | |
| 45 | |
| 46 setInterval(function () { | |
| 47 touch_sensor_value = digital_pin_D2.read(); | |
| 48 if (touch_sensor_value === 1 && last_t_sensor_value === 0) { | |
| 49 console.log("Buzz ON!!!"); | |
| 50 socket.emit('message', "present"); | |
| 51 mqtcli.publish('door', 'ding'); | |
| 52 //mqtcli.end(); // end connection | |
| 53 // FUR ULRICH! //http.get("http://ulno.local:8080/CMD?door_bell=ON"); | |
| 54 digital_pin_D6.write(touch_sensor_value); | |
| 55 } else if (touch_sensor_value === 0 && last_t_sensor_value === 1) { | |
| 56 console.log("Buzz OFF!!!"); | |
| 57 //socket.emit('message', "absent"); | |
| 58 mqtcli.publish('door', 'dong'); | |
| 59 // FUR ULRICH! //http.get("http://ulno.local:8080/CMD?door_bell=OFF"); | |
| 60 digital_pin_D6.write(touch_sensor_value); | |
| 61 } | |
| 62 last_t_sensor_value = touch_sensor_value; | |
| 63 }, 500); | |
| 64 } | |
| 65 | |
| 66 //Create Socket.io server | |
| 67 //var http = require('http'); // See top requires | |
| 68 var app = http.createServer(function (req, res) { | |
| 69 'use strict'; | |
| 70 res.writeHead(200, {'Content-Type': 'text/plain'}); | |
| 71 res.end('<h1>Hello world from Intel IoT platform!</h1>'); | |
| 72 }).listen(1338); | |
| 73 var io = require('socket.io')(app); | |
| 74 | |
| 75 console.log("Sample Reading Touch Sensor"); | |
| 76 | |
| 77 //Attach a 'connection' event handler to the server | |
| 78 io.on('connection', function (socket) { | |
| 79 'use strict'; | |
| 80 console.log('a user connected'); | |
| 81 //Emits an event along with a message | |
| 82 socket.emit('connected', 'Welcome'); | |
| 83 | |
| 84 //Start watching Sensors connected to Galileo board | |
| 85 startSensorWatch(socket); | |
| 86 | |
| 87 //Attach a 'disconnect' event handler to the socket | |
| 88 socket.on('disconnect', function () { | |
| 89 console.log('user disconnected'); | |
| 90 }); | |
| 91 }); |
