private static async Task MqttClient_ApplicationMessageReceived(object sender, MqttApplicationMessageReceivedEventArgs e)
{
// These are the topics we are subscribing to:
//$"homie/DimKitchen/Lights/DimLevel/set" // Used to set a new value for that node/property
//$"homie/DimKitchen/Lights/DimLevel/poll" // This will allow us to request an update from the device
//$"homie/$broadcast/#" // Example: homie/$broadcast/alert ← "Intruder detected"
//$"homie/xComfort/get" // Used for get-/setting data that's not part of the Homie specs, like
//$"homie/xComfort/set" // config files, config and such.
//$"homie/xComfort/RAW/in" // Allows the user to send raw bytes to the CI
//$"homie/xComfort/raw/in" // Same as RAW, but the bytes are now human readable strings "06 C1 04 ..."
//$"homie/xComfort/cmd" // A way to receive simple commands like "exit"
//$"homie/xComfort/shell" // Runs shell commands on the system. Potensial SECURITY HOLE
// Technically, it's these formats, but they are not as nice to read:
//$"{Program.Settings.MQTT_BASETOPIC}/{device.Name}/{node.PathName}/{property.PathName}/set" (and poll)
//$"{Program.Settings.MQTT_BASETOPIC}/$broadcast/#"
//$"{BasePublishingTopic}/get/#" (and set/# and RAW/in and raw/in and cmd/# and shell/#)
string[] topics = e.ApplicationMessage.Topic.Split("/"); // Split the topic into levels
string payload = Encoding.UTF8.GetString(e.ApplicationMessage.Payload); // e.ApplicationMessage.ConvertPayloadToString();
if (Program.Settings.GENERAL_DEBUGMODE)
{
DoLog($"Incomming MQTT message: {e.ApplicationMessage.Topic}={payload}", 2);
}
// (We trust that the MQTT subscription makes sure that we don't get any unwanted suff, so we don't have to check that ourselves.)
switch (topics[1]) // This will always be "$broadcast", "xComfort" or the name of a device.
{
case "$broadcast": // It's a broadcast message for all devices
{
// We have no real use for this at the moment, but we'll display and log it anyway.
DoLog($"Broadcasted message: {e.ApplicationMessage.Topic.ToString()}={payload}", 4);
break;
}
case "xComfort": // It's one of six possible things
{
switch (topics[2])
{
case "get":
{
if (topics.Length > 3 && topics[3] == "result")
{
DoLog("MQTT bug workaround!", 2); break;
} // A bug in the library. It doesn't properly unsubscribe to topics...
// Get and settable
if (payload == "config")
{
await SendMQTTMessageAsync($"{topics[1]}/{topics[2]}/result", Program.Settings.GetSettingsAsJSON(), false);
}
if (payload == "datapoints")
{
await SendMQTTMessageAsync($"{topics[1]}/{topics[2]}/result", Program.GetDatapointFile(), false);
}
if (payload == "debug")
{
await SendMQTTMessageAsync($"{topics[1]}/{topics[2]}/result", Program.Settings.GENERAL_DEBUGMODE.ToString(), false);
}
// Gettable only
if (payload == "temperature")
{
await SendMQTTMessageAsync($"{topics[1]}/{topics[2]}/result", Homie.GetStatsCPUload(), false);
}
if (payload == "status")
{
string reply = "--- STAUTS ---\n";
reply += $"Debug mode: {Program.Settings.GENERAL_DEBUGMODE}\n";
reply += $"StayAlive: {Program.StayAlive}\n";
reply += $"Datapoints: {CI.datapoints.Count}\n";
reply += $"Devices: {Homie.devices.Count}\n";
reply += $"Temperature: {Homie.GetStatsCPUtemp()}";
reply += $"Publications: {PublicationCounter}\n";
reply += "--- EOT ---\n";
await SendMQTTMessageAsync($"{topics[1]}/{topics[2]}/result", reply, false);
}
break;
}
case "set":
{
if (topics.Length > 3 && topics[3] == "result")
{
DoLog("MQTT bug workaround!", 2); break;
} // A bug in the library. It doesn't properly unsubscribe to topics...
// Get and settable
if (payload == "config")
{
await SendMQTTMessageAsync($"{topics[1]}/{topics[2]}/result", Program.Settings.WriteSettingsToFile(payload).ToString(), false);
}
if (payload == "datapoints")
{
await SendMQTTMessageAsync($"{topics[1]}/{topics[2]}/result", Program.SetDatapointFile(payload).ToString(), false);
}
if (payload == "debug")
{
Program.Settings.GENERAL_DEBUGMODE = (payload == "true");
await SendMQTTMessageAsync($"{topics[1]}/{topics[2]}/result", Program.Settings.GENERAL_DEBUGMODE.ToString(), false);
}
// Settable only
if (payload == "datapoint")
{
await SendMQTTMessageAsync($"{topics[1]}/{topics[2]}/result", Program.ImportDatapointsOneByOne(payload).ToString(), false);
}
break;
}
case "RAW":
{
await CI.SendData(e.ApplicationMessage.Payload);
break;
}
case "raw":
{
// Convert the human readable string back into the actualy bytes it represents, then sending it to the CI.
payload = payload.Replace(" ", "");
List <byte> byteList = new List <byte>();
for (int i = 0; i < payload.Length; i += 2)
{
byteList.Add(Convert.ToByte(payload.Substring(i, 2), 16));
}
await CI.SendData(byteList.ToArray());
break;
}
case "cmd":
{
if (payload == "exit")
{
Program.StayAlive = false;
}
if (payload == "update")
{
DoLog("Re-publishing all devices...", false);
foreach (Homie.Device device in Homie.devices)
{
await MQTT.PublishDeviceAsync(device);
}
DoLog("Done", 3, true, 10);
}
if (payload == "pollall")
{
DoLog("Polling all relevant devices...", true);
foreach (Homie.Device device in Homie.devices)
{
if (device.Datapoint.Class == 0)
{
await CI.RequestUpdateAsync(device.Datapoint.DP);
//System.Threading.Thread.Sleep(500);
}
}
DoLog("Polling complete!", 3, true, 10);
}
break;
}
case "shell":
{
// This is just a tad too much of a security risk to implement at this time.
// It might be a very useful feature, but there must be some security in place first!
// Have a look at https://loune.net/2017/06/running-shell-bash-commands-in-net-core/ for en example of how the execution can be implemented.
DoLog("Ignored request for shell: " + payload, 3);
break;
}
default: { break; }
}
break;
}
default: // It's a device's name, we must be more dynamic in our approach.
{
try
{
if (Program.Settings.GENERAL_DEBUGMODE)
{
DoLog($"Processing as datapoint related", 2);
}
Homie.Device device = Homie.devices.Find(x => x.Name == topics[1]);
if (Program.Settings.GENERAL_DEBUGMODE)
{
DoLog($"...found device: {device.Name}", 2);
}
Homie.Node node = device.Node.Find(x => x.PathName == topics[2]);
if (Program.Settings.GENERAL_DEBUGMODE)
{
DoLog($"...found node: {node.Name}", 2);
}
Homie.Property property = node.PropertyList.Find(x => x.PathName == topics[3]);
if (Program.Settings.GENERAL_DEBUGMODE)
{
DoLog($"...found property: {property.Name}", 2);
}
switch (topics[4])
{
case "set": { await CI.SendNewValueToDatapointAsync(device.Datapoint.DP, Convert.ToDouble(payload)); break; } //await Homie.UpdateSingleProperty($"{device.Name}/{node.PathName}/{property.PathName}", property, payload);
case "poll": { await CI.RequestUpdateAsync(device.Datapoint.DP); break; }
default: { DoLog($"Unknown action: {e.ApplicationMessage.Topic}"); break; }
}
//if (topics[4] == "set") { await Homie.UpdateSingleProperty($"{device.Name}/{node.PathName}/{property.PathName}",property, payload); }
//if (topics[4] == "poll") { await CI.RequestUpdateAsync(device.Datapoint.DP); }
//if (topics[4] != "set" && topics[4] != "poll") { DoLog($"Unknown action: {e.ApplicationMessage.Topic}"); }
}
catch (Exception exception)
{
DoLog($"Error processing MQTT message: {e.ApplicationMessage.Topic.ToString()}={payload}", 5);
LogException(exception);
}
break;
}
}
}