├── .gitignore
├── package.json
├── README.md
└── EmpaticaE4.js


/.gitignore:
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1 | 
2 | npm-debug.log
3 | 


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/package.json:
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 1 | {
 2 |   "name": "empatica-e4-client",
 3 |   "version": "1.0.3",
 4 |   "dependencies": {
 5 |     "net": "1.0.2",
 6 |     "binstring": "0.2.1"
 7 |   },
 8 |   "description": "EmpaticaE4 is a node.js module, which can communicate with Empatica BLE Server to fetch the sensor stream data from the EmpaticaE4 device. ",
 9 |   "main": "EmpaticaE4.js",
10 |   "scripts": {
11 |     "test": "echo \"Error: no test specified\" && exit 1"
12 |   },
13 |   "repository": {
14 |     "type": "git",
15 |     "url": "git+https://github.com/htil/empatica-e4-client.git"
16 |   },
17 |   "keywords": [
18 |     "EmpaticaE4",
19 |     "client"
20 |   ],
21 |   "author": "Arpan Man Sainju",
22 |   "license": "ISC",
23 |   "bugs": {
24 |     "url": "https://github.com/htil/empatica-e4-client/issues"
25 |   },
26 |   "homepage": "https://github.com/htil/empatica-e4-client#readme"
27 | }
28 | 


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/README.md:
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 1 | # empatica-e4-client
 2 | 
 3 | empatica-e4-client is a node.js module, which can communicate with Empatica BLE Server to fetch the sensor stream data from the EmpaticaE4 device. 
 4 | 
 5 | Instruction to setup the Emaptica BLE Server is provided in [link](http://developer.empatica.com/windows-ble-server.html "Emaptica Windows BLE Server")
 6 | 
 7 | # Installation
 8 | ```sh
 9 | $ cd <project_path>
10 | $ npm install empatica-e4-client
11 | ```
12 | # Subscribe Options
13 | ```code
14 | EmpaticaE4.E4_ACC   //3-axis accleration
15 | EmpaticaE4.E4_BVP   //Blood Volume Pulse
16 | EmpaticaE4.E4_GSR   //Galvanic Skin Response
17 | EmpaticaE4.E4_TEMP  //Skin Temperature
18 | EmpaticaE4.E4_IBI   //Interbeat Interval
19 | EmpaticaE4.E4_BATT  //Device Battery
20 | EmpaticaE4.E4_TAG   //Device Tag
21 | ```
22 | 
23 | # Demo
24 | ```javascript
25 | var EmpaticaE4 = require('empatica_e4-client');
26 | var dev1 = new EmpaticaE4();
27 | 
28 | var portNumber  = 28000;
29 | var ipAddress   = '127.0.0.1';
30 | var deviceID    = 'XX1234';        //Empatica E4 device ID 
31 | dev1.connect(portNumber ,ipAddress, deviceID, function(data){  
32 | 	var sensorData = EmpaticaE4.getString(data);
33 | 	console.log(sensorData);
34 | });
35 | setTimeout(function() {
36 | 	dev1.subscribe(EmpaticaE4.E4_BVP);
37 | }, 1000);
38 | ```
39 | 


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/EmpaticaE4.js:
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 1 | var EmpaticaE4 = function() {
 2 | 	EmpaticaE4.getString = function (data) {
 3 | 		return EmpaticaE4.conv(data, {out: "utf8"}).trim();
 4 | 	}
 5 | };
 6 | 
 7 | var device_connect = "device_connect ";
 8 | var device_subscribe = "device_subscribe";
 9 | var ON = "ON";
10 | var newline = " \n";
11 | 
12 | EmpaticaE4.prototype.onConnect = function(){
13 | 	console.log('Socket connected to', EmpaticaE4.ip,':',EmpaticaE4.port);
14 | 	var connCmd = device_connect + EmpaticaE4.deviceID + " \n";
15 | 	var byteStream = EmpaticaE4.conv(connCmd, { in: 'binary' });
16 | 	EmpaticaE4.client.write(byteStream,'ascii');
17 | };
18 | 
19 | 
20 | EmpaticaE4.prototype.connect = function(port, ip, deviceID, cb) {
21 | 	//sensor variables
22 | 	EmpaticaE4.E4_ACC		= "acc";					//3-axis accleration
23 | 	EmpaticaE4.E4_BVP 		= "bvp";					//Blood Volume Pulse
24 | 	EmpaticaE4.E4_GSR		= "gsr";					//Galvanic Skin Response
25 | 	EmpaticaE4.E4_TEMP		= "tmp";					//Skin Temperature
26 | 	EmpaticaE4.E4_IBI		= "ibi";					//Interbeat Interval
27 | 	EmpaticaE4.E4_BATT		= "bat";					//Device Battery
28 | 	EmpaticaE4.E4_TAG 		= "tag";					//Device Tag
29 | 
30 | 	//connection data
31 | 	EmpaticaE4.port = port;								//port nummber
32 | 	EmpaticaE4.ip = ip;									//EmpaticaBLEserver ip address
33 | 	EmpaticaE4.deviceID = deviceID;						//Empatica E4 Device id..dispalyed in Empatica BLE Server after server connection with device
34 | 	EmpaticaE4.isConnected = false;
35 | 
36 | 	//library imports 
37 | 	EmpaticaE4.net = require('net');					//for sokets
38 | 	EmpaticaE4.conv = require('binstring');				//to convert string to byte stream 
39 | 	EmpaticaE4.client = new EmpaticaE4.net.Socket();	//to make connection with server
40 | 	
41 | 	//make connection request to the server
42 | 	EmpaticaE4.client.connect(EmpaticaE4.port, EmpaticaE4.ip, this.onConnect);	
43 | 
44 | 	EmpaticaE4.client.on('data', cb);
45 | };
46 | 
47 | EmpaticaE4.prototype.subscribe = function (sensor) {
48 | 	var cmd = 'device_subscribe '+ sensor +' ON \n';
49 | 	var cmdBinary = EmpaticaE4.conv(cmd, { in:'binary' });
50 | 	EmpaticaE4.client.write(cmdBinary,'ascii');
51 | }
52 | 
53 | module.exports = EmpaticaE4;


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