// The desired property update callback, which receives the target temperature as a desired property update,
// and updates the current temperature value over telemetry and property update.
private async Task TargetTemperatureUpdateCallbackAsync(TwinCollection desiredProperties, object userContext)
{
string componentName = (string)userContext;
bool targetTempUpdateReceived = PnpConvention.TryGetPropertyFromTwin(
desiredProperties,
TargetTemperatureProperty,
out double targetTemperature,
componentName);
if (!targetTempUpdateReceived)
{
_logger.LogDebug($"Property: Update - component=\"{componentName}\", received an update which is not associated with a valid property.\n{desiredProperties.ToJson()}");
return;
}
_logger.LogDebug($"Property: Received - component=\"{componentName}\", {{ \"{TargetTemperatureProperty}\": {targetTemperature}°C }}.");
s_localWritablePropertiesVersion = desiredProperties.Version;
TwinCollection pendingReportedProperty = PnpConvention.CreateComponentWritablePropertyResponse(
componentName,
TargetTemperatureProperty,
targetTemperature,
(int)StatusCode.InProgress,
desiredProperties.Version,
"In progress - reporting current temperature");
await _deviceClient.UpdateReportedPropertiesAsync(pendingReportedProperty);
_logger.LogDebug($"Property: Update - component=\"{componentName}\", {{\"{TargetTemperatureProperty}\": {targetTemperature} }} in °C is {StatusCode.InProgress}.");
// Update Temperature in 2 steps
double step = (targetTemperature - _temperature[componentName]) / 2d;
for (int i = 1; i <= 2; i++)
{
_temperature[componentName] = Math.Round(_temperature[componentName] + step, 1);
await Task.Delay(6 * 1000);
}
TwinCollection completedReportedProperty = PnpConvention.CreateComponentWritablePropertyResponse(
componentName,
TargetTemperatureProperty,
_temperature[componentName],
(int)StatusCode.Completed,
desiredProperties.Version,
"Successfully updated target temperature");
await _deviceClient.UpdateReportedPropertiesAsync(completedReportedProperty);
_logger.LogDebug($"Property: Update - component=\"{componentName}\", {{\"{TargetTemperatureProperty}\": {_temperature[componentName]} }} in °C is {StatusCode.Completed}");
}
private async Task ReportInitialPropertyAsync(string componentName, string propertyName, CancellationToken cancellationToken)
{
// If the device properties are empty, report the default value with ACK(ac=203, av=0) as part of the PnP convention.
// "DefaultPropertyValue" is set from the device when the desired property is not set via the hub.
TwinCollection reportedProperties = PnpConvention.CreateComponentWritablePropertyResponse(
componentName,
propertyName,
DefaultPropertyValue,
(int)StatusCode.ReportDeviceInitialProperty,
DefaultAckVersion,
"Initialized with default value");
await _deviceClient.UpdateReportedPropertiesAsync(reportedProperties, cancellationToken);
_logger.LogDebug($"Report the default values for \"{componentName}\".\nProperty: Update - {reportedProperties.ToJson()} is complete.");
}