wifi signalK display

[cepicscepics]

TEST UPDATE:

I installed and activated MQTT plugin trying to send simulated signalk values (lat, long and deep)
restarted SK




this is the code in the esp8266: (from here)

Code:

#include <ESP8266WiFi.h>
#include <Wire.h>  // Only needed for Arduino 1.6.5 and earlier
//#include "SSD1306.h" // alias for `#include "SSD1306Wire.h"`
#include <ESP8266mDNS.h>
#include <PubSubClient.h>

////////////////////////wifi///////////////////////
const char* ssid = "MyHomeWiFi";
const char* password = "MyHomeWiFiPassWord";

const char* mqtt_server = "IP assigned to RPI"; // ip


//const char* mqtt_server = "rpi-speak.local";

WiFiClient espClient;
PubSubClient client(espClient);
long lastMsg = 0;
char msg[50];
int value = 0;

//SSD1306  display(0x3c, 4, 5); //d1 mini
//SSD1306 display(0x3c, D1, D2); //ESP8266 w/OLED
//SSD1306 display(0x3c, D2, D1); //NodeMCU

#define D1mini 1 //1 - using D1 mini

void setup() {
 
 Serial.begin(9600);
 setup_wifi();
 client.setServer(mqtt_server, 1883);
 client.setCallback(callback);
//  display.init();

//  display.flipScreenVertically();
//  display.setFont(ArialMT_Plain_10);
   reconnect();
}

void setup_wifi() {

 delay(10);
 // We start by connecting to a WiFi network
 Serial.println();
 Serial.print("Connecting to ");
 Serial.println(ssid);

 WiFi.begin(ssid, password);

 while (WiFi.status() != WL_CONNECTED) {
   delay(500);
   Serial.print(".");
 }
Serial.println("");
 Serial.println("WiFi connected");
 Serial.println("IP address: ");
 Serial.println(WiFi.localIP());
}

void callback(char* topic, byte* payload, unsigned int length) {
 Serial.print("Message arrived [");
 Serial.print(topic);
 Serial.print("] ");
//  display.clear();
 String msg;
 for (int i = 0; i < length; i++) {
   Serial.print((char)payload[i]);
   //display.clear();
   msg += (char)payload[i];
 }
  // display.setTextAlignment(TEXT_ALIGN_LEFT);
//    display.setFont(ArialMT_Plain_10);
   if (D1mini) {
//      display.drawStringMaxWidth(35,13,60,msg); //d1 mini
     } else {
//      display.drawStringMaxWidth(0,0,120,msg); //ESP8266 w/OLED   }
     }
//    display.display();
 
 
 Serial.println();

}

void reconnect() {
 // Loop until we're reconnected
 while (!client.connected()) {
   Serial.print("Attempting MQTT connection...");
   // Attempt to connect
   uint32_t chipid=ESP.getChipId();
   char clientid[25];
   snprintf(clientid,25,"WIFI-Display-%08X",chipid); //this adds the mac address to the client for a unique id
   Serial.print("Client ID: ");
   Serial.println(clientid);
   if (client.connect(clientid)) {
     Serial.println("connected");
     // Once connected, publish an announcement...
     //client.publish("Say", "-t 'hello world'");
     // ... and resubscribe
     client.subscribe("display1");
   } else {
     Serial.print("failed, rc=");
     Serial.print(client.state());
     Serial.println(" try again in 5 seconds");
     // Wait 5 seconds before retrying
     delay(5000);
   }
 }
}

void loop() {

// if (!client.connected()) {
 //  reconnect();
// }
 client.loop();
 
}

the esp connect to my home wifi but the serial monitor say:

Code:

Connecting to MyHomeWiFi
............
WiFi connected
IP address:
***.***.*.**
Attempting MQTT connection...Client ID: WIFI-Display-0029DCD7
failed, rc=5 try again in 5 seconds
Attempting MQTT connection...Client ID: WIFI-Display-0029DCD7
failed, rc=5 try again in 5 seconds
Attempting MQTT connection...Client ID: WIFI-Display-0029DCD7
failed, rc=5 try again in 5 seconds
Attempting MQTT connection...Client ID: WIFI-Display-0029DCD7
failed, rc=5 try again in 5 seconds
Attempting MQTT connection...Client ID: WIFI-Display-0029DCD7
failed, rc=5 try again in 5 seconds
Attempting MQTT connection...Client ID: WIFI-Display-0029DCD7
failed, rc=5 try again in 5 seconds
Attempting MQTT connection...Client ID: WIFI-Display-0029DCD7
failed, rc=5 try again in 5 seconds
Attempting MQTT connection...Client ID: WIFI-Display-0029DCD7

what's missing?

tnks a lot