File content as of revision 0:75fa10a22545:

/* mbed Microcontroller Library
 * Copyright (c) 2019 ARM Limited
 * SPDX-License-Identifier: Apache-2.0
 */

#include "mbed.h"
#include "EthernetInterface.h"
#include "platform/mbed_thread.h"
#include <MQTTClientMbedOs.h>
// Blinking rate in milliseconds
#define BLINKING_RATE_MS                                                    500
// Initialise the digital pin LED1 as an output
    DigitalOut led(LED1);
Serial pc(USBTX,USBRX);

InterruptIn button(USER_BUTTON);

int arrivedcount = 0;
TCPSocket socket;
MQTTClient client(&socket);
MQTT::Message message;

int button_pressed=0;

float version = 0.6;
    char* topic = "mbed-sample-pub";
    char* topic_sub = "mbed-sample-sub";


void messageArrived(MQTT::MessageData& md)
{
    MQTT::Message &message = md.message;
    pc.printf("Message arrived: qos %d, retained %d, dup %d, packetid %d\r\n", message.qos, message.retained, message.dup, message.id);
    pc.printf("Payload %.*s\r\n", message.payloadlen, (char*)message.payload);
    ++arrivedcount;
}

void buttonFunction() {
    
    button_pressed=1;
   
}




int main()
{
    button.rise(&buttonFunction);  // attach the address of the flip function to the rising edge
    
    const char* hostname = "broker.mqttdashboard.com";
    int port = 1883;    
    // Network interface
    EthernetInterface net;
    
    // Bring up the ethernet interface
    printf("Ethernet socket example\n");
    net.connect();

    // Show the network address
    const char *ip = net.get_ip_address();
    pc.printf("IP address is: %s\n", ip ? ip : "No IP");
        
    
    //client = MQTTClient::(&socket);
    socket.open(&net);
    socket.connect(hostname, port);
    
    int rc=0;
    
    MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
    data.MQTTVersion = 3;
    data.clientID.cstring = "mbed-sample";
    //data.username.cstring = "testuser";
    //data.password.cstring = "testpassword";
    if ((rc = client.connect(data)) != 0)
        pc.printf("rc from MQTT connect is %d\r\n", rc);

    if ((rc = client.subscribe(topic_sub, MQTT::QOS2, messageArrived)) != 0)
        pc.printf("rc from MQTT subscribe is %d\r\n", rc);

    
      
    
    
    

    while (true) {
        led = !led;
        thread_sleep_for(BLINKING_RATE_MS);
        if (button_pressed==1) {
            button_pressed=0;    
            pc.printf("sace publish\r\n");    
            // QoS 0
            char buf[100];
            sprintf(buf, "Hello World!  QoS 0 message from app version %f\r\n", version);
            message.qos = MQTT::QOS0;
            message.retained = false;
            message.dup = false;
            message.payload = (void*)buf;
            message.payloadlen = strlen(buf)+1;
            client.publish(topic, message);
            //pc.printf("sace jild\r\n"); 
            //client.yield(1000);
            //pc.printf("izjildovo\r\n"); 
        }
        pc.printf("sace jild\r\n"); 
        client.yield(1000);
        pc.printf("izjildovo\r\n"); 
        
    }
}