UDP MQTT to Openplotter with ESP32

[PaddyB]

 Any ideas ?

I have similar sending various sensor data, but sending it as signalk.  Now on micropython but before used this on the arduino ide >>

Code:

//                     send signalk data over UDP
//      *******************************************************
void sendSigK(String sigKey, float data)
{

 if (sendSig_Flag == 1)
 {
   DynamicJsonBuffer jsonBuffer;
   String deltaText;

   //  build delta message
   JsonObject &delta = jsonBuffer.createObject();

   //updated array
   JsonArray &updatesArr = delta.createNestedArray("updates");
   JsonObject &thisUpdate = updatesArr.createNestedObject();   //Json Object nested inside delta [...
   JsonArray &values = thisUpdate.createNestedArray("values"); // Values array nested in delta[ values....
   JsonObject &thisValue = values.createNestedObject();
   thisValue["path"] = sigKey;
   thisValue["value"] = data;

   thisUpdate["Source"] = "ESP32";

   // Send UDP packet
   Udp.beginPacket(remoteIp, remotePort);
   delta.printTo(Udp);
   Udp.println();
   Udp.endPacket();
   delta.printTo(Serial);
   Serial.println();
 }

Micropython here if you want a look (or a play) 
https://github.com/boatybits/boatymonpy
Still a work in progress but what there is works