/// <summary>
/// Publish MQTT message
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private async void Client_MqttMsgPublishReceived(object sender, MqttMsgPublishEventArgs e)
{
// Get id of device
var deviceId = e.Topic.Split('/')[2];
if (e.Message.Length < 200)
{
// ignore rogue messages
return;
}
WriteLine("MQTT handling uplink");
// Create or get device
var device = await AddDeviceAsync(deviceId);
if (!_whiteList.Accept(deviceId))
{
WriteLine($"Device {deviceId} is not whitelisted");
return;
}
if (device.Status != DeviceStatus.Enabled)
{
WriteLine($"Device {deviceId} disabled");
return;
}
// Convert message to json
var jsonText = Encoding.UTF8.GetString(e.Message);
dynamic jsonObject = JsonConvert.DeserializeObject(jsonText);
var counter = jsonObject.counter?.ToString();
var deviceMessage = jsonObject.payload_fields?.ToString();
if (string.IsNullOrEmpty(deviceMessage))
{
WriteLine($"Device {deviceId} seen");
return;
}
var metadata = jsonObject.metadata;
var frequency = metadata?.frequency?.ToString();
var gateway = metadata?.gateways?[0];
var gatewayEui = gateway?.gtw_id?.ToString();
var latitude = gateway?.latitude?.ToString();
var longitude = gateway?.longitude?.ToString();
var rssi = gateway?.rssi?.ToString();
// construct message for IoT Hub
dynamic iotHubMessage = JsonConvert.DeserializeObject(deviceMessage);
if (_addGatewayInfo)
{
iotHubMessage.ttnCounter = jsonObject.counter ?? -1;
iotHubMessage.ttnGatewayEui = gateway?.gtw_id?.ToString();
iotHubMessage.ttnGatewayLat = gateway?.latitude ?? 0.0;
iotHubMessage.ttnGatewayLon = gateway?.longitude ?? 0.0;
iotHubMessage.ttnGatewayFreq = metadata?.frequency ?? 0.0;
iotHubMessage.ttnGatewayRssi = gateway?.rssi ?? 0;
}
var iotHubMessageString = JsonConvert.SerializeObject(iotHubMessage);
Write($"{DateTime.Now:HH:mm:ss} Message received ({counter}/{deviceId}/{gatewayEui}/{latitude}/{longitude}/{frequency}/{rssi}): {iotHubMessageString}");
// create device client
var key = (_deviceKeyKind == "Primary")
? device.Authentication.SymmetricKey.PrimaryKey
: device.Authentication.SymmetricKey.SecondaryKey;
var deviceClient = _deviceClientList.GetDeviceClient(deviceId, key);
// send message
var message = new Microsoft.Azure.Devices.Client.Message(Encoding.UTF8.GetBytes(iotHubMessageString));
await deviceClient.SendEventAsync(message);
WriteLine("-IoT Hub message sent");
}
/// <summary>
/// Publish MQTT message
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static async void Client_MqttMsgPublishReceived(object sender, MqttMsgPublishEventArgs e)
{
Console.WriteLine("MQTT handling uplink");
// Convert message to json
var jsonText = Encoding.ASCII.GetString(e.Message);
dynamic jsonMessage = JsonConvert.DeserializeObject(jsonText);
// Get id of device
var deviceId = (string)jsonMessage.dev_eui;
// Create or get device
var device = (Device) await AddDeviceAsync(deviceId);
if (device.Status != DeviceStatus.Enabled)
{
Console.WriteLine($"Device {deviceId} disabled");
return;
}
// extract data from json
var deviceMessage = jsonMessage.fields.ToString();
var metaText = jsonMessage.metadata.ToString();
var jsonMeta = JsonConvert.DeserializeObject(metaText);
var time = jsonMeta[0].server_time.ToString();
// construct message for IoT Hub
dynamic iotHubMessage = JsonConvert.DeserializeObject(deviceMessage);
iotHubMessage.deviceId = deviceId;
iotHubMessage.time = time;
string iotHubMessageString = JsonConvert.SerializeObject(iotHubMessage);
Console.WriteLine($"IoT Hub message {iotHubMessageString}");
// create device client
var key = string.Empty;
if (ConfigurationManager.AppSettings["DeviceKeyKind"] == "Primary")
{
key = device.Authentication.SymmetricKey.PrimaryKey;
}
else
{
key = device.Authentication.SymmetricKey.SecondaryKey;
}
var deviceClient = _deviceClientList.GetDeviceClient(deviceId, key);
// send message
var message = new Message(Encoding.UTF8.GetBytes(iotHubMessageString));
await deviceClient.SendEventAsync(message);
Console.WriteLine("IoT Hub message sent");
}