/// <summary>
/// Get known characteristic(s) without service instance
/// </summary>
/// <param name="peripheral"></param>
/// <param name="serviceUuid"></param>
/// <param name="characteristicUuid"></param>
/// <param name="throwIfNotFound"></param>
/// <returns></returns>
public static IObservable <IGattCharacteristic?> GetKnownCharacteristic(this IPeripheral peripheral, string serviceUuid, string characteristicUuid, bool throwIfNotFound = false) =>
peripheral
.GetKnownService(serviceUuid, throwIfNotFound)
.Select(x =>
{
if (x == null)
{
return(Observable.Empty <IGattCharacteristic>());
}
return(x.GetKnownCharacteristic(characteristicUuid, throwIfNotFound));
})
.Switch();
public static IObservable <DeviceInfo> ReadDeviceInformation(this IPeripheral peripheral)
=> peripheral
.GetKnownService(StandardUuids.DeviceInformationServiceUuid, true)
.SelectMany(x => x.GetCharacteristics())
.SelectMany(x => x.Select(y => y.Read()))
.Concat()
.ToList()
.Select(data =>
{
var dev = new DeviceInfo();
foreach (var item in data)
{
switch (item.Characteristic.Uuid.ToLower())
{
case "00002a23-0000-1000-8000-00805f9b34fb":
dev.SystemId = Encoding.UTF8.GetString(item.Data);
break;
case "00002a24-0000-1000-8000-00805f9b34fb":
dev.ModelNumber = Encoding.UTF8.GetString(item.Data);
break;
case "00002a25-0000-1000-8000-00805f9b34fb":
dev.SerialNumber = Encoding.UTF8.GetString(item.Data);
break;
case "00002a26-0000-1000-8000-00805f9b34fb":
dev.FirmwareRevision = Encoding.UTF8.GetString(item.Data);
break;
case "00002a27-0000-1000-8000-00805f9b34fb":
dev.HardwareRevision = Encoding.UTF8.GetString(item.Data);
break;
case "00002a28-0000-1000-8000-00805f9b34fb":
dev.SoftwareRevision = Encoding.UTF8.GetString(item.Data);
break;
case "00002a29-0000-1000-8000-00805f9b34fb":
dev.ManufacturerName = Encoding.UTF8.GetString(item.Data);
break;
}
}
return(dev);
});
private async Task ReadFromDevice(IPeripheral device)
{
StopSearch();
var ServiceId = Guid.Parse("0000180A-0000-1000-8000-00805F9B34FB");
var ManufacturerName = Guid.Parse("00002A29-0000-1000-8000-00805F9B34FB");
var connectedDevice = await device.ConnectWait();
var service = await device.GetKnownService(ServiceId);
var characteristic = await service.GetKnownCharacteristics(new Guid[] { ManufacturerName });
if (characteristic.CanRead())
{
var data = await characteristic.Read();
var readValue = Encoding.UTF8.GetString(data.Data);
Debug.WriteLine($"> Read characteristic is: {readValue}");
}
}
public static IObservable <DeviceInfo> ReadDeviceInformation(this IPeripheral peripheral)
=> peripheral
.GetKnownService(StandardUuids.DeviceInformationServiceUuid, true)
.SelectMany(x => x.GetCharacteristics())
.SelectMany(x => x.Select(y => y.Read()))
.Concat()
.ToList()
.Select(data =>
{
var dev = new DeviceInfo();
foreach (var item in data)
{
switch (item.Characteristic.Uuid[3])
{
case '4':
dev.ModelNumber = BitConverter.ToString(item.Data);
break;
case '5':
dev.SerialNumber = BitConverter.ToString(item.Data);
break;
case '6':
dev.FirmwareRevision = BitConverter.ToString(item.Data);
break;
case '7':
dev.HardwareRevision = BitConverter.ToString(item.Data);
break;
case '8':
dev.SoftwareRevision = BitConverter.ToString(item.Data);
break;
case '9':
dev.ManufacturerName = BitConverter.ToString(item.Data);
break;
}
}
return(dev);
});
/// <summary> /// Discovers all characteristics for a known service /// </summary> /// <param name="peripheral"></param> /// <param name="serviceUuid"></param> /// <returns></returns> public static IObservable <IGattCharacteristic> GetCharacteristicsForService(this IPeripheral peripheral, Guid serviceUuid) => peripheral .GetKnownService(serviceUuid) .SelectMany(x => x.DiscoverCharacteristics());
/// <summary> /// Get known characteristic(s) without service instance /// </summary> /// <param name="peripheral"></param> /// <param name="serviceUuid"></param> /// <param name="characteristicIds"></param> /// <returns></returns> public static IObservable <IGattCharacteristic> GetKnownCharacteristics(this IPeripheral peripheral, Guid serviceUuid, params Guid[] characteristicIds) => peripheral .GetKnownService(serviceUuid) .SelectMany(x => x.GetKnownCharacteristics(characteristicIds));
/// <summary> /// /// </summary> /// <param name="peripheral"></param> /// <param name="serviceUuid"></param> /// <returns></returns> public static IObservable <IList <IGattCharacteristic> > GetCharacteristicsByService(this IPeripheral peripheral, string serviceUuid) => peripheral .GetKnownService(serviceUuid, true) .Select(x => x.GetCharacteristics()) .Switch();