Add twitch chat receiving

app.js

@@ -6,7 +6,7 @@ const movement = 1000;
 
 // Create a port
 const port = new SerialPort({
-    path: '/dev/ttyUSB1',
+    path: '/dev/ttyUSB0',
     baudRate: 9600,
 })
 
@@ -93,3 +93,42 @@ app.listen(3000, () => {
     console.log(`Example app listening on port`)
 })
 
+const tmi = require('tmi.js');
+
+const client = new tmi.Client({
+	channels: [ 'twitchplaysplotter' ]
+});
+
+client.connect();
+
+client.on('message', (channel, tags, message, self) => {
+
+	console.log(`${tags['display-name']}: ${message}`);
+
+  switch ( message.toLowerCase() ) {
+    case 'pu':
+    console.log("Performing a PU");
+    break;
+    case 'pd':
+    console.log("Performing a PD");
+    break;
+    case 'up':
+    console.log("Performing a move UP");
+    break;
+    case 'down':
+    console.log("Performing a move DOWN");
+    break;
+    case 'left':
+    console.log("Performing a move LEFT");
+    break;
+    case 'right':
+    console.log("Performing a move RIGHT");
+    break;
+    default:
+    console.log("Message not recognized");
+    toPlotter(`IN;SC0,0,100,0,100;SP1;PA60,60;PU`)
+    break;
+
+  }
+
+});