如何透過 MCS switch 頻道點燈

• 首先請至 MCS 創建好一個內有 switch datachannel 的 test device.
• 請參考這個 [創建好 ml 專案] (https://iamblue.gitbooks.io/microlattice-js-for-linkit-rtos/content/zh-TW/intro/create.html)
• 範例程式碼：

  __pinmux(35, 8);

  __wifi({
    mode: 'station', // default is station
    auth: 'PSK_WPA2',
    ssid: 'Input your ssid',
    password: 'Input your password',
  });

  global.eventStatus.on('wifiConnect', function() {
    __mcs(
      "mqtt.mcs.mediatek.com",                  // string
      "1883",                                   // string
      "mcs/{your deviceId}/{your deviceKey}/+", // string
      '7687client',                             // string
      0,                  // number: Qo0: 0, Qo1: 1, Qo2: 2
      function(data) {
        print(data);
        if (data.indexOf("switch,1") === 14) {
          __gpioWrite(35, 1);
        } else if (data.indexOf("switch,0") === 14) {
          __gpioWrite(35, 0);
        }
    });
  });