Added a toggle endpoint that checks the db for button state then uses that to set it to the opposite.

server.js

@@ -5,6 +5,7 @@ var PythonShell = require('python-shell');
 
 app.use(express.static('public'));
  
+var relayState = false;
 
 // This responds with "Hello World" on the homepage
 app.get('/', function (req, res) {
@@ -61,6 +62,23 @@ app.post('/off', function (req, res) {
 	});
 })
 
+app.post('/toggle', function (req, res) {
+	relayState = !relayState
+	var options = {
+	  pythonOptions: ['-u'],
+	  args: relayState
+	};
+
+	PythonShell.run('scripts/fanController.py', options, function (err, results) {
+  	if (err) throw err;
+  	
+  	if (results[0] == true)
+  		res.send('off')
+  	else
+  		res.send('none')
+	});
+})
+
 var server = app.listen(3000, function () {
 
 	var host = server.address().address