| <!DOCTYPE html> |
| <script> |
| let device; |
| window.onmessage = messageEvent => { |
| if (messageEvent.data === 'RequestAndConnect') { |
| navigator.bluetooth.requestDevice({ |
| filters: [{services: ['heart_rate']}] |
| }) |
| .then(device => device.gatt.connect()) |
| .then(gattServer => { |
| device = gattServer.device; |
| parent.postMessage('Connected', '*'); |
| }).catch(err => { |
| console.error(err); |
| parent.postMessage('FAIL: ' + err, '*'); |
| }); |
| } else if (messageEvent.data === 'StartNotifications') { |
| device.gatt.getPrimaryService('heart_rate') |
| .then(service => service.getCharacteristic('heart_rate_measurement')) |
| .then(char => char.startNotifications()) |
| .then(char => { |
| char.addEventListener('characteristicvaluechanged', function() {}); |
| parent.postMessage('NotificationsStarted', '*'); |
| }); |
| } |
| }; |
| parent.postMessage("Ready", "*"); |
| </script> |
