public async Task <List <BroadlinkDevice> > DiscoverAsync()
{
var discoveredDevices = new List <BroadlinkDevice>();
byte[] discoveryPacket = PacketGenerator.GenerateDiscoveryPacket(LocalIPEndPoint.Address, (short)LocalIPEndPoint.Port);
IPEndPoint ep = new IPEndPoint(IPAddress.Broadcast, 80);
using (var client = new UdpClient(LocalIPEndPoint))
{
Task.Run(async() =>
{
while (true)
{
var result = await client.ReceiveAsync();
if (result != null)
{
var response = result.Buffer;
if (response != null)
{
var macArray = new byte[7];
Array.Copy(response, 0x3a, macArray, 0, 7);
var discoveredDevice = CreateBroadlinkDevice(BitConverter.ToInt16(response, 0x34));
discoveredDevice.LocalIPEndPoint = LocalIPEndPoint;
discoveredDevice.EndPoint = result.RemoteEndPoint;
discoveredDevice.MacAddress = macArray;
discoveredDevices.Add(discoveredDevice);
}
}
}
});
await client.SendAsync(discoveryPacket, discoveryPacket.Length, ep);
Debug.WriteLine("Message sent to the broadcast address");
await Task.Delay(3000);
return(discoveredDevices);
}
}
/// <summary>
/// Read the data for a remote control command.
/// </summary>
/// <returns>Byte array containing the packet for <see cref="SendRemoteCommandAsync(byte[])" /></returns>
public async Task <byte[]> ReadLearningDataAsync()
{
var packet = PacketGenerator.GenerateReadLearningModePacket(this);
var encryptedResponse = await SendAndWaitForResponseAsync(packet);
var errorCode = BitConverter.ToInt16(encryptedResponse, 0x22);
if (errorCode != 0)
{
throw new Exception($"Error {errorCode} in learning response");
}
var encryptedPayload = encryptedResponse.Slice(0x38);
var payload = encryptedPayload.Decrypt(EncryptionKey);
var learningData = payload.Slice(0x04);
return(learningData);
}
/// <summary>
/// Obtain the device id and encryption key needed for other calls
/// </summary>
/// <remarks>Run this method before making any other calls</remarks>
/// <returns></returns>
public async Task AuthorizeAsync()
{
byte[] authorizationPacket = PacketGenerator.GenerateAuthorizationPacket(this);
var encryptedResponse = await SendAndWaitForResponseAsync(authorizationPacket);
var encryptedPayload = encryptedResponse.Slice(0x38);
var payload = encryptedPayload.Decrypt();
var deviceId = new byte[4];
Array.Copy(payload, 0x00, deviceId, 0, deviceId.Length);
var encryptionKey = new byte[16];
Array.Copy(payload, 0x04, encryptionKey, 0, encryptionKey.Length);
DeviceId = deviceId;
EncryptionKey = encryptionKey;
}
/// <summary>
/// Get the temperature
/// </summary>
/// <returns>temperature in degrees Celsius</returns>
public async Task <float> GetTemperatureAsync()
{
var packet = PacketGenerator.GenerateReadTemperaturePacket(this);
var encryptedResponse = await SendAndWaitForResponseAsync(packet);
var errorCode = BitConverter.ToInt16(encryptedResponse, 0x22);
if (errorCode != 0)
{
throw new Exception($"Error {errorCode} in temperature response");
}
var encryptedPayload = encryptedResponse.Slice(0x38);
var payload = encryptedPayload.Decrypt(EncryptionKey);
var temperatureData = payload.Slice(0x04, 0x05);
var temperature = temperatureData[0] + (float)temperatureData[1] / 10;
return(temperature);
}
/// <summary>
/// Execute a remote control command
/// </summary>
/// <param name="data">Packet obtained using <see cref="ReadLearningDataAsync()" /></param>
/// <returns></returns>
public async Task SendRemoteCommandAsync(byte[] data)
{
var packet = PacketGenerator.GenerateSendDataPacket(this, data);
await SendAsync(packet);
}
/// <summary>
/// Start the remote control command learning mode.
/// </summary>
/// <returns></returns>
public async Task EnterLearningModeAsync()
{
var packet = PacketGenerator.GenerateStartLearningModePacket(this);
await SendAsync(packet);
}