diff --git a/lib/helper.js b/lib/helper.js
new file mode 100644
index 0000000..23ac07d
--- /dev/null
+++ b/lib/helper.js
@@ -0,0 +1,71 @@
+const crypto = require('crypto');
+const random = require('random');
+const nonce = require('nonce')();
+
+const makeFakeIMEI = () => {
+  const num1 = random.int(1000, 9999);
+  const num2 = random.int(1000, 9999);
+  return `DF7425A0-${num1}-${num2}-9F5E-3BC9179E48FB`;
+};
+
+const loginPayload = ({ email, password }) => ({
+  email,
+  password,
+  version: 6,
+  ts: `${Math.round(new Date().getTime() / 1000)}`,
+  nonce: `${nonce()}`,
+  appid: 'oeVkj2lYFGnJu5XUtWisfW4utiN4u9Mq',
+  imei: makeFakeIMEI(),
+  os: 'iOS',
+  model: 'iPhone10,6',
+  romVersion: '11.1.2',
+  appVersion: '3.5.3',
+});
+
+const wssLoginPayload = ({ at, apiKey }) => {
+  const timeStamp = new Date() / 1000;
+  const ts = Math.floor(timeStamp);
+  const sequence = Math.floor(timeStamp * 1000);
+  const payload = {
+    action: 'userOnline',
+    userAgent: 'app',
+    version: 6,
+    nonce: `${nonce()}`,
+    apkVesrion: '1.8',
+    os: 'ios',
+    at,
+    apikey: apiKey,
+    ts: `${ts}`,
+    model: 'iPhone10,6',
+    romVersion: '11.1.2',
+    sequence,
+  };
+  return JSON.stringify(payload);
+};
+
+const wssUpdatePayload = ({ apiKey, deviceId, params }) => {
+  const timeStamp = new Date() / 1000;
+  const sequence = Math.floor(timeStamp * 1000);
+  const payload = {
+    action: 'update',
+    userAgent: 'app',
+    apikey: apiKey,
+    deviceid: `${deviceId}`,
+    params,
+    sequence,
+  };
+  return JSON.stringify(payload);
+};
+
+const makeAuthorizationSign = body =>
+  crypto
+    .createHmac('sha256', '6Nz4n0xA8s8qdxQf2GqurZj2Fs55FUvM')
+    .update(JSON.stringify(body))
+    .digest('base64');
+
+module.exports = {
+  makeAuthorizationSign,
+  loginPayload,
+  wssLoginPayload,
+  wssUpdatePayload,
+};
diff --git a/main.js b/main.js
new file mode 100644
index 0000000..3261a38
--- /dev/null
+++ b/main.js
@@ -0,0 +1,100 @@
+const rp = require('request-promise');
+const W3CWebSocket = require('websocket').w3cwebsocket;
+const WebSocketAsPromised = require('websocket-as-promised');
+const delay = require('delay');
+
+const {
+  makeAuthorizationSign,
+  loginPayload,
+  wssLoginPayload,
+  wssUpdatePayload,
+} = require('./lib/helper');
+
+class eWeLink {
+  constructor({ region = 'us', email, password }) {
+    this.apiUrl = `https://${region}-api.coolkit.cc:8080/api`;
+    this.apiWebSocket = 'wss://us-pconnect3.coolkit.cc:8080/api/ws';
+    this.email = email;
+    this.password = password;
+    this.apiKey = '';
+    this.at = '';
+  }
+
+  async makeRequest({ method = 'GET', uri, body = {}, qs = {} }) {
+    const { apiKey, at } = this;
+
+    if (!apiKey && !at) {
+      await this.login();
+    }
+
+    const response = await rp({
+      method,
+      uri: `${this.apiUrl}${uri}`,
+      headers: { Authorization: `Bearer ${this.at}` },
+      body,
+      qs,
+      json: true,
+    });
+
+    return response;
+  }
+
+  async login() {
+    const body = loginPayload({
+      email: this.email,
+      password: this.password,
+    });
+    const response = await rp({
+      method: 'POST',
+      uri: `${this.apiUrl}/user/login`,
+      headers: { Authorization: `Sign ${makeAuthorizationSign(body)}` },
+      body,
+      json: true,
+    });
+    this.apiKey = response.user.apikey;
+    this.at = response.at;
+    return response;
+  }
+
+  async getDevices() {
+    const response = await this.makeRequest({
+      uri: '/user/device',
+      qs: { lang: 'en', getTags: 1 },
+    });
+    return response;
+  }
+
+  async getDevice(deviceId) {
+    const response = await this.makeRequest({
+      uri: `/user/device/${deviceId}`,
+      qs: { lang: 'en', getTags: 1 },
+    });
+    return response;
+  }
+
+  async toggleDevice(deviceId) {
+    const device = await this.getDevice(deviceId);
+    const status = device.params.switch === 'on' ? 'off' : 'on';
+
+    const payloadLogin = wssLoginPayload({ at: this.at, apiKey: this.apiKey });
+    const payloadUpdate = wssUpdatePayload({
+      apiKey: this.apiKey,
+      deviceId,
+      params: { switch: status },
+    });
+
+    const wsp = new WebSocketAsPromised(this.apiWebSocket, {
+      createWebSocket: url => new W3CWebSocket(url),
+    });
+
+    await wsp.open();
+    await wsp.send(payloadLogin);
+    await delay(1000);
+    await wsp.send(payloadUpdate);
+    await wsp.close();
+
+    return { status: 'ok' };
+  }
+}
+
+module.exports = eWeLink;
diff --git a/package.json b/package.json
index 4474af2..74827c5 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "ewelink-api",
   "version": "1.0.0",
   "description": "eWeLink API for Node.js",
-  "main": "index.js",
+  "main": "main.js",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },