diff --git a/apps/awairmonitor/awair_to_bangle.html b/apps/awairmonitor/awair_to_bangle.html
index 4e4465b75..8624d01f6 100644
--- a/apps/awairmonitor/awair_to_bangle.html
+++ b/apps/awairmonitor/awair_to_bangle.html
@@ -1,7 +1,488 @@
 <!DOCTYPE HTML>
 <html>
 <head>
-<script src="https://puck-js.com/puck.js"></script>
+<!-- For unknown reasons, when this page is opened through the app store, puck.js is loaded via HTTP (not HTTPS) which causes the request to be blocked. -->
+<!--<script src="https://puck-js.com/puck.js"></script>-->
+<!-- So instead, let's embed the code of puck.js below (2021/12/27) -->
+<script>
+/*
+--------------------------------------------------------------------
+Puck.js BLE Interface library for Nordic UART
+                      Copyright 2021 Gordon Williams (gw@pur3.co.uk)
+                      https://github.com/espruino/EspruinoWebTools
+--------------------------------------------------------------------
+This Source Code Form is subject to the terms of the Mozilla Public
+License, v. 2.0. If a copy of the MPL was not distributed with this
+file, You can obtain one at http://mozilla.org/MPL/2.0/.
+--------------------------------------------------------------------
+This creates a 'Puck' object that can be used from the Web Browser.
+
+Simple usage:
+
+  Puck.write("LED1.set()\n")
+
+Execute expression and return the result:
+
+  Puck.eval("BTN.read()", function(d) {
+    alert(d);
+  });
+
+Or write and wait for a result - this will return all characters,
+including echo and linefeed from the REPL so you may want to send
+`echo(0)` and use `console.log` when doing this.
+
+  Puck.write("1+2\n", function(d) {
+    alert(d);
+  });
+
+Both `eval` and `write` will return a promise if no callback
+function is given as an argument.
+
+  alert( await Puck.eval("BTN.read()") )
+
+  alert( await Puck.write("1+2\n") )
+
+
+Or more advanced usage with control of the connection
+ - allows multiple connections
+
+  Puck.connect(function(connection) {
+    if (!connection) throw "Error!";
+    connection.on('data', function(d) { ... });
+    connection.on('close', function() { ... });
+    connection.write("1+2\n", function() {
+      connection.close();
+    });
+  });
+
+ChangeLog:
+
+...
+1v00 : Added Promises to write/eval
+1v01 : Raise default Chunk Size to 20
+       Auto-adjust chunk size up if we receive >20 bytes in a packet
+
+*/
+(function (root, factory) {
+    if (typeof define === 'function' && define.amd) {
+        // AMD. Register as an anonymous module.
+        define([], factory);
+    } else if (typeof module === 'object' && module.exports) {
+        // Node. Does not work with strict CommonJS, but
+        // only CommonJS-like environments that support module.exports,
+        // like Node.
+        module.exports = factory();
+    } else {
+        // Browser globals (root is window)
+        root.Puck = factory();
+    }
+}(typeof self !== 'undefined' ? self : this, function () {
+
+  if (typeof navigator == "undefined") return;
+
+  var isBusy;
+  var queue = [];
+
+  function checkIfSupported() {
+    // Hack for windows
+    if (navigator.platform.indexOf("Win")>=0 &&
+        (navigator.userAgent.indexOf("Chrome/54")>=0 ||
+         navigator.userAgent.indexOf("Chrome/55")>=0 ||
+         navigator.userAgent.indexOf("Chrome/56")>=0)
+        ) {
+      console.warn("Chrome <56 in Windows has navigator.bluetooth but it's not implemented properly");
+      if (confirm("Web Bluetooth on Windows is not yet available.\nPlease click Ok to see other options for using Web Bluetooth"))
+        window.location = "https://www.espruino.com/Puck.js+Quick+Start";
+      return false;
+    }
+    if (navigator.bluetooth) return true;
+    console.warn("No Web Bluetooth on this platform");
+    var iOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
+    if (iOS) {
+      if (confirm("To use Web Bluetooth on iOS you'll need the WebBLE App.\nPlease click Ok to go to the App Store and download it."))
+        window.location = "https://itunes.apple.com/us/app/webble/id1193531073";
+    } else {
+      if (confirm("This Web Browser doesn't support Web Bluetooth.\nPlease click Ok to see instructions for enabling it."))
+        window.location = "https://www.espruino.com/Quick+Start+BLE#with-web-bluetooth";
+    }
+    return false;
+  }
+
+  var NORDIC_SERVICE = "6e400001-b5a3-f393-e0a9-e50e24dcca9e";
+  var NORDIC_TX = "6e400002-b5a3-f393-e0a9-e50e24dcca9e";
+  var NORDIC_RX = "6e400003-b5a3-f393-e0a9-e50e24dcca9e";
+  var DEFAULT_CHUNKSIZE = 20;
+
+  function log(level, s) {
+    if (puck.log) puck.log(level, s);
+  }
+
+  function ab2str(buf) {
+    return String.fromCharCode.apply(null, new Uint8Array(buf));
+  }
+
+  function str2ab(str) {
+    var buf = new ArrayBuffer(str.length);
+    var bufView = new Uint8Array(buf);
+    for (var i=0, strLen=str.length; i<strLen; i++) {
+      bufView[i] = str.charCodeAt(i);
+    }
+    return buf;
+  }
+
+  function handleQueue() {
+    if (!queue.length) return;
+    var q = queue.shift();
+    log(3,"Executing "+JSON.stringify(q)+" from queue");
+    if (q.type == "write") puck.write(q.data, q.callback, q.callbackNewline);
+    else log(1,"Unknown queue item "+JSON.stringify(q));
+  }
+
+  function connect(callback) {
+    if (!checkIfSupported()) return;
+
+    var connection = {
+      on : function(evt,cb) { this["on"+evt]=cb; },
+      emit : function(evt,data) { if (this["on"+evt]) this["on"+evt](data); },
+      isOpen : false,
+      isOpening : true,
+      txInProgress : false
+    };
+    var btServer = undefined;
+    var btService;
+    var connectionDisconnectCallback;
+    var txCharacteristic;
+    var rxCharacteristic;
+    var txDataQueue = [];
+    var flowControlXOFF = false;
+    var chunkSize = DEFAULT_CHUNKSIZE;
+
+    connection.close = function() {
+      connection.isOpening = false;
+      if (connection.isOpen) {
+        connection.isOpen = false;
+        connection.emit('close');
+      } else {
+        if (callback) callback(null);
+      }
+      if (btServer) {
+        btServer.disconnect();
+        btServer = undefined;
+        txCharacteristic = undefined;
+        rxCharacteristic = undefined;
+        chunkSize = DEFAULT_CHUNKSIZE;
+      }
+    };
+
+    connection.write = function(data, callback) {
+      if (data) txDataQueue.push({data:data,callback:callback,maxLength:data.length});
+      if (connection.isOpen && !connection.txInProgress) writeChunk();
+
+      function writeChunk() {
+        if (flowControlXOFF) { // flow control - try again later
+          setTimeout(writeChunk, 50);
+          return;
+        }
+        var chunk;
+        if (!txDataQueue.length) {
+          puck.writeProgress();
+          return;
+        }
+        var txItem = txDataQueue[0];
+        puck.writeProgress(txItem.maxLength - txItem.data.length, txItem.maxLength);
+        if (txItem.data.length <= chunkSize) {
+          chunk = txItem.data;
+          txItem.data = undefined;
+        } else {
+          chunk = txItem.data.substr(0,chunkSize);
+          txItem.data = txItem.data.substr(chunkSize);
+        }
+        connection.txInProgress = true;
+        log(2, "Sending "+ JSON.stringify(chunk));
+        txCharacteristic.writeValue(str2ab(chunk)).then(function() {
+          log(3, "Sent");
+          if (!txItem.data) {
+            txDataQueue.shift(); // remove this element
+            if (txItem.callback)
+              txItem.callback();
+          }
+          connection.txInProgress = false;
+          writeChunk();
+        }).catch(function(error) {
+         log(1, 'SEND ERROR: ' + error);
+         txDataQueue = [];
+         connection.close();
+        });
+      }
+    };
+
+    navigator.bluetooth.requestDevice({
+        filters:[
+          { namePrefix: 'Puck.js' },
+          { namePrefix: 'Pixl.js' },
+          { namePrefix: 'MDBT42Q' },
+          { namePrefix: 'RuuviTag' },
+          { namePrefix: 'iTracker' },
+          { namePrefix: 'Thingy' },
+          { namePrefix: 'Espruino' },
+          { services: [ NORDIC_SERVICE ] }
+        ], optionalServices: [ NORDIC_SERVICE ]}).then(function(device) {
+      log(1, 'Device Name:       ' + device.name);
+      log(1, 'Device ID:         ' + device.id);
+      // Was deprecated: Should use getPrimaryServices for this in future
+      //log('BT>  Device UUIDs:      ' + device.uuids.join('\n' + ' '.repeat(21)));
+      device.addEventListener('gattserverdisconnected', function() {
+        log(1, "Disconnected (gattserverdisconnected)");
+        connection.close();
+      });
+      connection.device = device;
+      connection.reconnect(callback);
+    }).catch(function(error) {
+      log(1, 'ERROR: ' + error);
+      connection.close();
+    });
+
+    connection.reconnect = function(callback) {
+      connection.device.gatt.connect().then(function(server) {
+        log(1, "Connected");
+        btServer = server;
+        return server.getPrimaryService(NORDIC_SERVICE);
+      }).then(function(service) {
+        log(2, "Got service");
+        btService = service;
+        return btService.getCharacteristic(NORDIC_RX);
+      }).then(function (characteristic) {
+        rxCharacteristic = characteristic;
+        log(2, "RX characteristic:"+JSON.stringify(rxCharacteristic));
+        rxCharacteristic.addEventListener('characteristicvaluechanged', function(event) {
+          var dataview = event.target.value;
+          var data = ab2str(dataview.buffer);
+          if (data.length > chunkSize) {
+            log(2, "Received packet of length "+data.length+", increasing chunk size");
+            chunkSize = data.length;
+          }
+          if (puck.flowControl) {
+            for (var i=0;i<data.length;i++) {
+              var ch = data.charCodeAt(i);
+              var remove = true;
+              if (ch==19) {// XOFF
+                log(2,"XOFF received => pause upload");
+                flowControlXOFF = true;
+              } else if (ch==17) {// XON
+                log(2,"XON received => resume upload");
+                flowControlXOFF = false;
+              } else
+                remove = false;
+              if (remove) { // remove character
+                data = data.substr(0,i-1)+data.substr(i+1);
+                i--;
+              }
+            }
+          }
+          log(3, "Received "+JSON.stringify(data));
+          connection.emit('data', data);
+        });
+        return rxCharacteristic.startNotifications();
+      }).then(function() {
+        return btService.getCharacteristic(NORDIC_TX);
+      }).then(function (characteristic) {
+        txCharacteristic = characteristic;
+        log(2, "TX characteristic:"+JSON.stringify(txCharacteristic));
+      }).then(function() {
+        connection.txInProgress = false;
+        connection.isOpen = true;
+        connection.isOpening = false;
+        isBusy = false;
+        queue = [];
+        callback(connection);
+        connection.emit('open');
+        // if we had any writes queued, do them now
+        connection.write();
+      }).catch(function(error) {
+        log(1, 'ERROR: ' + error);
+        connection.close();
+      });
+    };
+
+    return connection;
+  };
+
+  // ----------------------------------------------------------
+  var connection;
+  /* convenience function... Write data, call the callback with data:
+       callbackNewline = false => if no new data received for ~0.2 sec
+       callbackNewline = true => after a newline */
+  function write(data, callback, callbackNewline) {
+    if (!checkIfSupported()) return;
+
+    let result;
+    /// If there wasn't a callback function, then promisify
+    if (typeof callback !== 'function') {
+      callbackNewline = callback;
+
+      result = new Promise((resolve, reject) => callback = (value, err) => {
+        if (err) reject(err);
+        else resolve(value);
+      });
+    }
+
+    if (isBusy) {
+      log(3, "Busy - adding Puck.write to queue");
+      queue.push({type:"write", data:data, callback:callback, callbackNewline:callbackNewline});
+      return result;
+    }
+
+    var cbTimeout;
+    function onWritten() {
+      if (callbackNewline) {
+        connection.cb = function(d) {
+          var newLineIdx = connection.received.indexOf("\n");
+          if (newLineIdx>=0) {
+            var l = connection.received.substr(0,newLineIdx);
+            connection.received = connection.received.substr(newLineIdx+1);
+            connection.cb = undefined;
+            if (cbTimeout) clearTimeout(cbTimeout);
+            cbTimeout = undefined;
+            if (callback)
+              callback(l);
+            isBusy = false;
+            handleQueue();
+          }
+        };
+      }
+      // wait for any received data if we have a callback...
+      var maxTime = 300; // 30 sec - Max time we wait in total, even if getting data
+      var dataWaitTime = callbackNewline ? 100/*10 sec if waiting for newline*/ : 3/*300ms*/;
+      var maxDataTime = dataWaitTime; // max time we wait after having received data
+      cbTimeout = setTimeout(function timeout() {
+        cbTimeout = undefined;
+        if (maxTime) maxTime--;
+        if (maxDataTime) maxDataTime--;
+        if (connection.hadData) maxDataTime=dataWaitTime;
+        if (maxDataTime && maxTime) {
+          cbTimeout = setTimeout(timeout, 100);
+        } else {
+          connection.cb = undefined;
+          if (callback)
+            callback(connection.received);
+          isBusy = false;
+          handleQueue();
+          connection.received = "";
+        }
+        connection.hadData = false;
+      }, 100);
+    }
+
+    if (connection && (connection.isOpen || connection.isOpening)) {
+      if (!connection.txInProgress) connection.received = "";
+      isBusy = true;
+      connection.write(data, onWritten);
+      return result
+    }
+
+    connection = connect(function(puck) {
+      if (!puck) {
+        connection = undefined;
+        if (callback) callback(null);
+        return;
+      }
+      connection.received = "";
+      connection.on('data', function(d) {
+        connection.received += d;
+        connection.hadData = true;
+        if (connection.cb)  connection.cb(d);
+      });
+      connection.on('close', function(d) {
+        connection = undefined;
+      });
+      isBusy = true;
+      connection.write(data, onWritten);
+    });
+
+    return result
+  }
+
+  // ----------------------------------------------------------
+
+  var puck = {
+    /// Are we writing debug information? 0 is no, 1 is some, 2 is more, 3 is all.
+    debug : 1,
+    /// Should we use flow control? Default is true
+    flowControl : true,
+    /// Used internally to write log information - you can replace this with your own function
+    log : function(level, s) { if (level <= this.debug) console.log("<BLE> "+s)},
+    /// Called with the current send progress or undefined when done - you can replace this with your own function
+    writeProgress : function (charsSent, charsTotal) {
+      //console.log(charsSent + "/" + charsTotal);
+    },
+    /** Connect to a new device - this creates a separate
+     connection to the one `write` and `eval` use. */
+    connect : connect,
+    /// Write to Puck.js and call back when the data is written.  Creates a connection if it doesn't exist
+    write : write,
+    /// Evaluate an expression and call cb with the result. Creates a connection if it doesn't exist
+    eval : function(expr, cb) {
+
+      const response = write('\x10Bluetooth.println(JSON.stringify(' + expr + '))\n', true)
+        .then(function (d) {
+          try {
+            return JSON.parse(d);
+          } catch (e) {
+            log(1, "Unable to decode " + JSON.stringify(d) + ", got " + e.toString());
+            return Promise.reject(d);
+          }
+        });
+
+
+      if (cb) {
+        return void response.then(cb, (err) => cb(null, err));
+      } else {
+        return response;
+      }
+
+    },
+    /// Write the current time to the Puck
+    setTime : function(cb) {
+      var d = new Date();
+      var cmd = 'setTime('+(d.getTime()/1000)+');';
+      // in 1v93 we have timezones too
+      cmd += 'if (E.setTimeZone) E.setTimeZone('+d.getTimezoneOffset()/-60+');\n';
+      write(cmd, cb);
+    },
+    /// Did `write` and `eval` manage to create a connection?
+    isConnected : function() {
+      return connection!==undefined;
+    },
+    /// get the connection used by `write` and `eval`
+    getConnection : function() {
+      return connection;
+    },
+    /// Close the connection used by `write` and `eval`
+    close : function() {
+      if (connection)
+        connection.close();
+    },
+    /** Utility function to fade out everything on the webpage and display
+    a window saying 'Click to continue'. When clicked it'll disappear and
+    'callback' will be called. This is useful because you can't initialise
+    Web Bluetooth unless you're doing so in response to a user input.*/
+    modal : function(callback) {
+      var e = document.createElement('div');
+      e.style = 'position:absolute;top:0px;left:0px;right:0px;bottom:0px;opacity:0.5;z-index:100;background:black;';
+      e.innerHTML = '<div style="position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-family: Sans-Serif;font-size:400%;color:white;">Click to Continue...</div>';
+      e.onclick = function(evt) {
+        callback();
+        evt.preventDefault();
+        document.body.removeChild(e);
+      };
+      document.body.appendChild(e);
+    }
+  };
+  return puck;
+}));
+</script>
+
+
 <script type="text/javascript">
 
 // Don't forget to enable the Local API on your Awair before using this
@@ -13,6 +494,7 @@ var bt_connection;
 var is_connected = false;
 var reconnect_counter = 5;
 var reconnect_attempt_counter = 1;
+var is_chart_started = false;
 
 function initChart() {
 	var chart_co2;
@@ -106,8 +588,7 @@ function initChart() {
 			let current_humi = dataPoints_1['humid'][dataPoints_1['humid'].length-1].y;
 			let current_temp = dataPoints_1['temp'][dataPoints_1['temp'].length-1].y;
 			let last_update = dataPoints_1['temp'].length-1;
-			console.log(is_connected);
-			console.log(bt_connection);
+
 			if (is_connected && bt_connection && bt_connection.isOpen) {
 				bt_connection.write('\x10bt_current_co2='+current_co2+';bt_current_voc='+current_voc+';bt_current_pm25='+current_pm25+';bt_current_humi='+current_humi+';bt_current_temp='+current_temp+';bt_last_update='+last_update+';\n');
 
@@ -134,7 +615,6 @@ function initChart() {
 				}
 			}
 			
-
 			setTimeout(function(){updateChart()}, 1000);
 		});
 	}
@@ -151,7 +631,10 @@ function connectBT() {
 	    bt_connection = c;
 	    is_connected = true;
 	    reconnect_attempt_counter = 1;
-	    initChart();
+	    if (!is_chart_started) {
+	    	initChart();
+	    	is_chart_started = true;
+	    }
 	});
 }
 
