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UDP MQTT to Openplotter with ESP32
#21
(2020-11-11, 11:22 PM)Peter— Wrote: Looks like it must be nmea code for OpenCPN, but someone wrote that OpenCPN should soon be able to receive SignalK so I’m not going to waste my time on this before I have my system ready and hopefully by spring OpenCPN will include it.

Br, Peter

Opencpn can read signalk already, those wind sentences above seem to work  in the opencpn dashboard OK without the node red conversion, though they won't be written to the logbook.
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#22
Aaah I see there is an option to choose SignalK in OpenCPN network - I was using UDP ON 3333.

So for SignalK should I use the official SignalK network port displayed in openplotter under the network-tab, or still use port 3333?

Kind Regards,
Peter
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#23
(2020-11-12, 09:30 AM)Peter— Wrote: Aaah I see there is an option to choose SignalK in OpenCPN network - I was using UDP ON 3333.

So for SignalK should I use the official SignalK network port displayed in openplotter under the network-tab, or still use port 3333?

Kind Regards,
Peter

For opencpn on the Pi it is 10.10.10.1 , port 3000.
Your 3333 port I thing is only sending data to signalk, opencpn gets the data from opencpn. 

Sorry, that obscure wind comment was about another thread.
https://forum.openmarine.net/showthread.php?tid=2523
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#24
Its all working. Here is my updated code including OTA as well since my hardware will be installed on top of my sailboat mast.

Code:
#include "WiFi.h"
#include "AsyncUDP.h"
#include <WiFi.h>
#include <WiFiClient.h>
#include <WebServer.h>
#include <ESPmDNS.h>
#include <Update.h>
#include <math.h>
#define WindSensorPin (13)
#include "DHT.h"

#define DHTPIN 14     // Digital pin connected to the DHT sensor
#define DHTTYPE DHT11   // DHT 22  (AM2302), AM2321
DHT dht(DHTPIN, DHTTYPE);



float WindSpeed; // speed miles per hour
int rotations = 0;
int flag = 0;


const char* host = "esp32";
const char* ssid = "nameofnetwork";
const char* password = "codeofnetwork";

int count = 0;
int count_wifi = 0;

AsyncUDP udp;

WebServer server(80);

/*
* Login page
*/

const char* loginIndex =
"<form name='loginForm'>"
   "<table width='20%' bgcolor='A09F9F' align='center'>"
       "<tr>"
           "<td colspan=2>"
               "<center><font size=4><b>ESP32 Login Page</b></font></center>"
               "<br>"
           "</td>"
           "<br>"
           "<br>"
       "</tr>"
       "<td>Username:</td>"
       "<td><input type='text' size=25 name='userid'><br></td>"
       "</tr>"
       "<br>"
       "<br>"
       "<tr>"
           "<td>Password:</td>"
           "<td><input type='Password' size=25 name='pwd'><br></td>"
           "<br>"
           "<br>"
       "</tr>"
       "<tr>"
           "<td><input type='submit' onclick='check(this.form)' value='Login'></td>"
       "</tr>"
   "</table>"
"</form>"
"<script>"
   "function check(form)"
   "{"
   "if(form.userid.value=='admin' && form.pwd.value=='admin')"
   "{"
   "window.open('/serverIndex')"
   "}"
   "else"
   "{"
   " alert('Error Password or Username')/*displays error message*/"
   "}"
   "}"
"</script>";

/*
* Server Index Page
*/

const char* serverIndex =
"<script src='https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js'></script>"
"<form method='POST' action='#' enctype='multipart/form-data' id='upload_form'>"
  "<input type='file' name='update'>"
       "<input type='submit' value='Update'>"
   "</form>"
"<div id='prg'>progress: 0%</div>"
"<script>"
 "$('form').submit(function(e){"
 "e.preventDefault();"
 "var form = $('#upload_form')[0];"
 "var data = new FormData(form);"
 " $.ajax({"
 "url: '/update',"
 "type: 'POST',"
 "data: data,"
 "contentType: false,"
 "processData:false,"
 "xhr: function() {"
 "var xhr = new window.XMLHttpRequest();"
 "xhr.upload.addEventListener('progress', function(evt) {"
 "if (evt.lengthComputable) {"
 "var per = evt.loaded / evt.total;"
 "$('#prg').html('progress: ' + Math.round(per*100) + '%');"
 "}"
 "}, false);"
 "return xhr;"
 "},"
 "success:function(d, s) {"
 "console.log('success!')"
"},"
"error: function (a, b, c) {"
"}"
"});"
"});"
"</script>";

/*
* setup function
*/
void setup(void) {
   Serial.begin(115200);
   dht.begin();
   pinMode(WindSensorPin, INPUT);
   WiFi.mode(WIFI_STA);
   WiFi.begin(ssid, password);
   if (WiFi.waitForConnectResult() != WL_CONNECTED) {
       Serial.println("WiFi Failed");
       while(1) {
           delay(1000);
       }
   }
   if(udp.connect(IPAddress(10,10,10,1), 3333)) {
       Serial.println("UDP connected");
       udp.onPacket([](AsyncUDPPacket packet) {
           Serial.print("UDP Packet Type: ");
           Serial.print(packet.isBroadcast()?"Broadcast":packet.isMulticast()?"Multicast":"Unicast");
           Serial.print(", From: ");
           Serial.print(packet.remoteIP());
           Serial.print(":");
           Serial.print(packet.remotePort());
           Serial.print(", To: ");
           Serial.print(packet.localIP());
           Serial.print(":");
           Serial.print(packet.localPort());
           Serial.print(", Length: ");
           Serial.print(packet.length());
           Serial.print(", Data: ");
           Serial.write(packet.data(), packet.length());
           Serial.println();
           //reply to the client
           packet.printf("Got %u bytes of data", packet.length());
       });
       //Send unicast
       udp.print("Hello Server!");
   }

 /*use mdns for host name resolution*/
 if (!MDNS.begin(host)) { //http://esp32.local
   Serial.println("Error setting up MDNS responder!");
   while (1) {
     delay(1000);
   }
 }
 Serial.println("mDNS responder started");
 /*return index page which is stored in serverIndex */
 server.on("/", HTTP_GET, []() {
   server.sendHeader("Connection", "close");
   server.send(200, "text/html", loginIndex);
 });
 server.on("/serverIndex", HTTP_GET, []() {
   server.sendHeader("Connection", "close");
   server.send(200, "text/html", serverIndex);
 });
 /*handling uploading firmware file */
 server.on("/update", HTTP_POST, []() {
   server.sendHeader("Connection", "close");
   server.send(200, "text/plain", (Update.hasError()) ? "FAIL" : "OK");
   ESP.restart();
 }, []() {
   HTTPUpload& upload = server.upload();
   if (upload.status == UPLOAD_FILE_START) {
     Serial.printf("Update: %s\n", upload.filename.c_str());
     if (!Update.begin(UPDATE_SIZE_UNKNOWN)) { //start with max available size
       Update.printError(Serial);
     }
   } else if (upload.status == UPLOAD_FILE_WRITE) {
     /* flashing firmware to ESP*/
     if (Update.write(upload.buf, upload.currentSize) != upload.currentSize) {
       Update.printError(Serial);
     }
   } else if (upload.status == UPLOAD_FILE_END) {
     if (Update.end(true)) { //true to set the size to the current progress
       Serial.printf("Update Success: %u\nRebooting...\n", upload.totalSize);
     } else {
       Update.printError(Serial);
     }
   }
 });
 server.begin();
}


void loop()
{
 int sensorValue = digitalRead(13);
 //Serial.println(sensorValue);
 if (sensorValue == 0 && flag == 0)
 {
   rotations++;
   flag = 1;
 }
 if (sensorValue != 0)
 {
   
   flag = 0;
 }
 
 
 server.handleClient();
 delay(1);
 count++;
 count_wifi++;
 if (count > 1500)
 {
   count = 0;
   WindSpeed = rotations * 0.40;
   //Serial.print(rotations);   Serial.print("\t\t");
   //Serial.println(WindSpeed);

   char udpmessage[1024];
   sprintf(udpmessage, "{\"updates\":[{\"$source\":\"esp32.wind.apparent\",\"values\":[{\"path\":\"environment.wind.speedApparent\",\"value\":%f}]}]}", WindSpeed);
   udp.print(udpmessage);
   Serial.println(udpmessage);
   rotations = 0;

 float h = dht.readHumidity() / 100;
 // Read temperature as Celsius (the default)
 float t = dht.readTemperature() +  273.15;
 char udpmessage2[1024];
 sprintf(udpmessage2, "{\"updates\":[{\"$source\":\"esp32.wind.apparent\",\"values\":[{\"path\":\"environment.outside.temperature\",\"value\":%f}]}]}", t);
 udp.print(udpmessage2);
 Serial.println(udpmessage2);

 char udpmessage3[1024];
 sprintf(udpmessage3, "{\"updates\":[{\"$source\":\"esp32.wind.apparent\",\"values\":[{\"path\":\"environment.outside.humidity\",\"value\":%f}]}]}", h);
 udp.print(udpmessage3);
 Serial.println(udpmessage3);
 
 }
 if (count_wifi > 60000)
 {  
   count_wifi = 0;
   if(WiFi.status() == WL_CONNECTED)
   {
     Serial.println("wificonnect!!! !");
   }
   else
   {
     Serial.println("failed"); //   WiFi.reconnect(); //    ESP.restart();
     WiFi.mode(WIFI_STA);
     WiFi.begin(ssid, password);
   }
 }
}
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