How to send sane messages? (with cayenneLLP)

[G2G2G2G]

I don't see it in any of the examples, best one seems to be: https://github.com/gmag11/EnigmaIOT/blob/master/examples/enigmaiot_node/enigmaiot_node.ino which has no control of what is sent?

Instead of:

g/1/data [{"channel":0,"type":2,"name":"analog_in","value":2.99},{"channel":1,"type":103,"name":"temperature","value":21.1}]
g/1/status {"per":0.000000e+00,"lostmessages":0,"totalmessages":292,"packetshour":122.46}

should be:

g/1/data {"analog_in":2.99,"temperature":21.1}

JSON is like: "THING":"VALUE" no reason to do "name":"THING","value":VALUE

What's all the channel, types, etc I can't find documentation at all and I can't think of a use case for it? MQTT has channels (topics) if it's needed to spread them out. And status calculations/storage just seems to waste gateway memory.

Is this padding for the encryption so it's harder to break or something?

This tutorial does it good: https://github.com/gmag11/EnigmaIOT/tree/master/examples/enigmaiot_node_msgpack Is this cayenneLLP specific that it has all of the extra data? You say msgpack is less efficient but it also can have less data, can we achieve the same in Cayenne or no?

Thanks!

[dgcasana]

if you are going to work with json objects I recommend you enigmaiot_node_msgpack.ino that example sends messages as you expect. you can even send values ​​in array (for DHT22 for example).

float humidity = dht.getHumidity();
  float temperature = dht.getTemperature();

  String sensor = String(temperature) + ";" + String (humidity) + ";0"; // dummy data for domoticz

  json["idx"] = 5;
  json["nvalue"] = 0;
  json["svalue"] = sensor;

  int len = measureMsgPack (json) + 1;
    uint8_t* buffer = (uint8_t*)malloc (len);
    len = serializeMsgPack (json, (char*)buffer, len);
    Serial.printf ("Message Len %d\n", len);
    Serial.printf ("Trying to send: %s\n", printHexBuffer (buffer, len));
    // Send buffer data
    if (!EnigmaIOTNode.sendData (buffer, len, MSG_PACK)) {
        Serial.println ("---- Error sending data");
    } else {
        Serial.println ("---- Data DHT22 sent");
    }
    free (buffer);

The channel, type, etc is how CayenneLLP treats the messages, before the msgpack I used the channel as idx in domoticz.

About status messages I'm not sure but I think they can be disabled in espnow_hall.h

[G2G2G2G]

@dgcasana Yes I mentioned that in my post and asked about Cayenne encoding there as well.

Also DHT22 doesn't measure humidity correctly, can be off 3-20%, you should use SHT31, SHT35, SHT85 or BME280 (if you want pressure) DHT and AHT sensors aren't usable for anything other than temperature. Do not buy them.

& thanks for the status message, I saw it in there but was hoping there was a better setting than commenting out code. /e actually nvm I don't see where it can actually be disabled just in that file

[gmag11]

CayenneLPP to JSON conversion is done by CayenneLPP library so I've attached to its format. You can check an example here https://github.com/ElectronicCats/CayenneLPP/blob/master/examples/Decode/Decode.ino

You can use that and process it after receiving MQTT message.

EnigmaIOTNode example shows how to manage CayenneLPP data.

If you need specific JSON format, then it is better to use MsgPack.

I do not remember if status data can be disabled. Anyway you can subscribe to g/1/data instead g/1/# to get only data messages. I'll check if there is any setting in EnitmaIOTConfig.h to control that feature. I will add it if does not exist.

[G2G2G2G]

Actually looks like the channel stuff is some specific design of cayenneLPP, some reason the extra messages are added (idc enough to check why) but it's just extra useless data so I guess I'll have to use msgpack.

[gmag11]

In a3e0439ab26b9f2f76b409e871881a97881c1483 E've added an option to EnigmaIOTConfig.h to control status sending after data here