Connect to Slack on Tessel

申請 Slack

因為 Slack 非常方便且好用，所以我第一個想到要串接的對象就是它，接連幾天的測試，已經能透過 Tessel 發送訊息至 Slack Channel。

首先得先擁有一組 Slack 的帳號與 Channel，再設置 Incoming WebHooks。

便可取得 Webhook Url

Tessel Wifi

先讓 Tessel 連接家中的 Wifi

$ tessel wifi -n 'Alan 的 AirPort Time Capsule' -p 'PASSWORD'
TESSEL! Connected to TM-00-04-f000da30-00544741-1ca82586.
INFO Connecting to "Alan 的 AirPort Time Capsule" with wpa2 security...
INFO Acquiring IP address.
..
INFO Connected!

IP        192.168.1.46
DNS       168.95.192.1
DHCP      192.168.1.1
Gateway   192.168.1.1

依照 Tessel 在官網上 Wifi 的範例，修改一下程式碼：

wifi-control.js

var https = require('https');

wifi.on('connect', function(data) {

  console.log("connect emitted", data);

  var json = JSON.parse('{"text":"This is a line of text in a channel.\nAnd this is another line of text."}');
  var postData = 'payload=' + JSON.stringify(json);

  var options = {
      hostname: 'hooks.slack.com',
      port: 443,
      path: '/services/T030MA704/B04MARY2F/clicTENx48f4h5v9OePzePkH',
      method: 'POST',
      headers: {
          'Content-Type': 'application/x-www-form-urlencoded',
          'Content-Length': postData.length
      }
  };

  // Setup the request.  The options parameter is
  // the object we defined above.
  var req = https.request(options, function(res) {
      res.setEncoding('utf-8');
      var responseString = '';

      res.on('data', function(data) {
          responseString += data;
      });

      res.on('end', function() {
          console.log(responseString);
      });
  });

  req.on('error', function(e) {
      console.log('something error.');
  });

  req.write(postData);
  req.end();

}

因為 Slack 是透過 https 發送，所以這邊得使用 https.request 來傳遞封包。 運行 Wifi-control.js 測試是否可以正常傳送至 Slack Channel。

$ tessel run wifi-control.js
TESSEL! Connected to TM-00-04-f000da30-00544741-1ca82586.
INFO Bundling directory /Users/alan/Documents/tessel-code
INFO Deploying bundle (8.87 MB)...
INFO Running script...
connect emitted {
dns : 168.95.192.1,
ip : 192.168.1.46,
event : status,
connected : 1,
dhcp : 192.168.1.1,
ssid : Alan 的 AirPort Time Capsule,
gateway : 192.168.1.1
}
ok

測試可以正常收到囉！！

如此就可以應用在各種需要通知的狀況上，太棒了！

Wifi 斷線

要如何讓 Tessel 斷開 wifi 呢，只要下這行指令：

$ tessel wifi -d
TESSEL! Connected to TM-00-04-f000da30-00544741-1ca82586.
Erasing saved wifi profiles
Erased wifi profiles

太方便了...

May 3rd, 2015 1:41:16am