display battery stats

raspberry/roberto/views/frontend/templates/index.html

@@ -138,6 +138,15 @@ socket.on('data', (data) => {
   console.log('Data received: ',data);
 });
 
+socket.on('battery', (data) => {
+  console.log('Data received: ',data);
+  var canvas = document.getElementById("textoverlay");
+  var ctx = canvas.getContext("2d");
+  ctx.font = "24px Arial";
+  ctx.fillStyle = "blue";
+  ctx.fillText(data, canvas.width/3, 30);
+});
+
       function playStream(videoElement, hostname, port, path, configuration, reportErrorCB) {
         var l = window.location;
         var wsHost = (hostname != undefined) ? hostname : l.hostname;