public async Task <TelemetryPoint> GetDataAsync()
{
string iotHubDeviceId = AppSettings.iotHubDeviceId;
decimal temperature;
float[] analogInput;
bool[] digitalInput;
try
{
if (!modbusClientAlive)
{
modbusClient = new ModbusClient(
AppSettings.modbusHost,
AppSettings.modbusPort);
modbusClient.Init();
modbusClientAlive = true;
}
analogInput = await modbusClient.ReadRegistersFloatsAsync(
AppSettings.temperatureInputOffset,
AppSettings.temperatureInputCount,
AppSettings.unitIdentifier);
temperature = decimal.Round(
(decimal)analogInput[0], 3); // 3 decimals
digitalInput = await modbusClient.ReadInputStatusAsync(
AppSettings.digitalInputOffset, // 10001 + offset
AppSettings.digitalInputCount,
AppSettings.unitIdentifier);
}
catch (Exception ex)
{
Misc.LogException($"Exception while calling ReadRegistersAsync(): {ex.Message}\n" +
$"Stack Trace --\n{ex.StackTrace}");
modbusClientAlive = false;
return(null);
}
TelemetryPoint sensorData = new TelemetryPoint()
{
iotHubDeviceId = iotHubDeviceId,
temperature = temperature,
digitalInput = digitalInput
};
return(sensorData);
}