Initial commit

README.md

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+# Exhibition remote control
+
+This is a very simple prototype-like software to control the power states of all devices in the [CityLAB Berlin](http://citylab-berlin.org/) exhibition. It's running on a Raspberry Pi and exposes a web interface to be controlled from the intranet.
+
+We're using TP-Link HS100 smart power plugs to hard-switch on/off all devices. There is no clean shutdown implemented yet. The power switches are not password protected and should therefore operate inside a separate network just for the exhibition.
+
+## User-Interface
+
+The UI consists of one single button with instructions/warnings. After switching on the button, switching back off is disabled for a while to ensure PCs properly boot first. There is a warning to shut down projectors manually first.
+
+![image](https://user-images.githubusercontent.com/546852/89296357-8386a580-d662-11ea-9b28-9cb36cd5a0fb.png)
+
+
+## Todo:
+- Properly shut down PCs (using this: [Windows PCs](https://www.howtogeek.com/109655/how-to-remotely-shut-down-or-restart-windows-pcs/), [Windows PCs](https://lifehacker.com/shut-down-your-windows-pc-remotely-from-linux-5275652), [Linux PCs](https://www.cyberciti.biz/faq/remote-shutdown-linux-computer-from-the-cli/)) and ensure PCs have shut down (using ping) before turning off smart switches.
+- Turn off projectors before shutdown

index.js

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+const express = require('express');
+const app = express();
+const http = require('http');
+const WebSocket = require('ws');
+const basicAuth = require('express-basic-auth');
+
+const TpLinkClient = require('tplink-smarthome-api').Client
+
+const tplink = new TpLinkClient();
+
+const plug = tplink.getPlug({ host: '192.168.230.253' });
+
+
+
+//initialize a simple http server
+const server = http.createServer(app);
+
+//initialize the WebSocket server instance
+const wss = new WebSocket.Server({ server });
+
+
+function parseMessage(str) {
+  try {
+      return JSON.parse(str);
+  } catch (e) {
+      return str;
+  }
+}
+
+wss.on('connection', (ws) => {
+
+  // console.log('websocket connected')
+
+  //connection is up, let's add a simple simple event
+  ws.on('message', (message) => {
+      message = parseMessage(message)
+      // console.log('received: %s', message);
+      // ws.send(`Hello, you sent -> ${message}`);
+
+      // console.log(message.exhibition)
+
+      if (message.exhibitionState) {
+        plug.setPowerState(true);
+      } else {
+        plug.setPowerState(false);
+      }
+  });
+
+  //send immediatly a feedback to the incoming connection
+  // ws.send('Hi there, I am a WebSocket server');
+});
+
+//start our server
+server.listen(process.env.PORT || 80, () => {
+    console.log(`Server started on port ${server.address().port} :)`);
+});
+
+app.use(basicAuth({
+    users: { 'admin': 'supersecret' },
+    challenge: true
+}))
+app.use(express.static('public'))