public async Task SetupNotifications(string bleDeviceId, Dictionary <string, string> telemetryMap)
{
BLEDevice = await BLEService.Connect(bleDeviceId);
TelemetryMap = telemetryMap;
foreach (var gatt in telemetryMap)
{
var telemetryField = gatt.Value;
var pair = new GattPair(gatt.Key);
var service = await BLEDevice.GetServiceAsync(pair.ServiceId);
if (service != null) // service could be null if mapping has old values related to other devices
{
var characteristic = await service.GetCharacteristicAsync(pair.CharacteristicId);
if (characteristic != null) // like above but for characteristic
{
if (telemetryField != null)
{
await BLEService.EnableNotification(characteristic);
}
else
{
await BLEService.DisableNotification(characteristic);
}
}
}
}
MessagingCenter.Send(new ResultMessage <IDevice>(BLEDevice), Constants.BLE_DEVICE_READY);
}
public async void OnDataAvailable(object sender, CharacteristicUpdatedEventArgs e)
{
var pair = new GattPair(e.Characteristic);
var measureField = TelemetryMap[pair.GattKey];
var value = e.Characteristic.GetValue();
//XamarinDevice.BeginInvokeOnMainThread(() =>
//{
// FormattedText.Spans.Add(new Span { Text = $"Sending {measureField}={value}\n", ForegroundColor = Color.Green });
//});
//TODO only if device connected
await DeviceClient.SendTelemetry($"{{\"{measureField}\":{value}}}", null);
}
private async void SaveMapping()
{
foreach (var service in Services)
{
foreach (var characteristic in service.Characteristics)
{
var pair = new GattPair(service.Id, characteristic.Id);
MappingStorage.Current.Add(pair.GattKey, characteristic.SelectedMeasure?.FieldName);
}
}
MappingStorage.Current.Save();
await IoTCentral.Current.StartService(Device.Id.ToString(), MappingStorage.Current.GetAll());
await Navigation.NavigateTo(new DeviceViewModel(Navigation));
}
