public static async Task OnTTNDeviceEvent([MqttTrigger(typeof(TTNConfigProvider), "%TTNAppID%/devices/+/events/#")] IMqttMessage message, ILogger logger)
{
logger.LogInformation($"{DateTime.Now:g} Message for topic {message.Topic}");
var messageParts = message.Topic.Split('/');
var deviceId = messageParts[2];
var deviceEvent = messageParts[4];
using (var registryManager = RegistryManager.CreateFromConnectionString(AzureConfigProvider.GetIoTHubConnectionString()))
{
// TODO: This is a workaround for https://github.com/chkr1011/MQTTnet/issues/569. To be implemented in the correct way once this is fixed.
switch (deviceEvent)
{
case "create":
{
await registryManager.AddDeviceAsync(new Device(deviceId));
logger.LogInformation($"{DateTime.Now:g} Added device {deviceId} to IoT Hub");
}
break;
case "delete":
{
await registryManager.RemoveDeviceAsync(deviceId);
logger.LogInformation($"{DateTime.Now:g} Removed device {deviceId} from IoT Hub");
}
break;
default:
break;
}
}
}
public static async Task OnTTNDeviceDeleted([MqttTrigger(typeof(TTNConfigProvider), "%TTNAppID%/devices/+/events/delete")] IMqttMessage message, ILogger logger)
{
logger.LogInformation($"{DateTime.Now:g} Device deletion message for topic {message.Topic}");
var messageParts = message.Topic.Split('/');
var deviceId = messageParts[2];
using (var registryManager = RegistryManager.CreateFromConnectionString(AzureConfigProvider.GetIoTHubConnectionString()))
{
await registryManager.RemoveDeviceAsync(deviceId);
logger.LogInformation($"{DateTime.Now:g} Removed device {deviceId} from IoT Hub");
}
}
public static async Task OnTTNUplinkMessage([HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = null)] HttpRequest request, ILogger logger)
{
logger.LogInformation($"{DateTime.Now:g} Device to Cloud message received");
var requestBody = await new StreamReader(request.Body).ReadToEndAsync();
var jsonData = JObject.Parse(requestBody);
var appId = jsonData["app_id"].ToString();
var deviceId = jsonData["dev_id"].ToString();
if (appId.Equals(TTNConfigProvider.GetTTNAppId()))
{
using (var registryManager = RegistryManager.CreateFromConnectionString(AzureConfigProvider.GetIoTHubConnectionString()))
{
var device = await registryManager.GetDeviceAsync(deviceId);
using (var deviceClient = DeviceClient.CreateFromConnectionString(AzureConfigProvider.GetDeviceConnectionString(deviceId, device.Authentication.SymmetricKey.PrimaryKey)))
{
var eventMessage = new Microsoft.Azure.Devices.Client.Message(Encoding.UTF8.GetBytes(jsonData.ToString()));
await deviceClient.SendEventAsync(eventMessage);
}
logger.LogInformation($"{DateTime.Now:g} Sent event from device {deviceId} to IoT Hub");
}
}
}