private async Task GetInitialConfiguration()
{
// First - Read settings from a file
SumpPumpSettings fileSettings = null;
SumpPumpSettings twinSettings = null;
if (File.Exists(ConfigFile))
{
fileSettings = JsonConvert.DeserializeObject <SumpPumpSettings>(File.ReadAllText(ConfigFile));
}
// Now grab the device twin settings
var twin = await iotClient.GetTwinAsync();
if (twin != null)
{
twinSettings = JsonConvert.DeserializeObject <SumpPumpSettings>(twin.Properties.Desired.ToString());
}
// Take the best version of the settings
if (twinSettings != null)
{
settings = twinSettings;
}
else if (fileSettings != null)
{
settings = fileSettings;
}
// Report back to the device twin that we took the new settings
if (twinSettings != null)
{
await SaveSettings(fileSettings, twinSettings);
}
}
private async Task SaveSettings(SumpPumpSettings currentSettings, SumpPumpSettings newSettings)
{
if (currentSettings == null || currentSettings.DeviceName != newSettings.DeviceName || currentSettings.MaxWaterLevel != newSettings.MaxWaterLevel)
{
// Save settings to a file
string newSettingsJson = JsonConvert.SerializeObject(newSettings);
using (var writer = File.CreateText(ConfigFile))
{
writer.WriteLine(newSettingsJson);
writer.Flush();
writer.Close();
}
// Tell Azure we took their settings
var serializerSettings = new JsonSerializerSettings()
{
ContractResolver = new CamelCasePropertyNamesContractResolver()
};
await iotClient.UpdateReportedPropertiesAsync(JsonConvert.DeserializeObject <TwinCollection>(newSettingsJson, serializerSettings));
}
}
