File content as of revision 2:983b7f5dde1e:

// main.cpp

#include "mbed.h"
#include "ISM43362Interface.h"
#include "TCPSocket.h"
#include "MQTTmbed.h"
#include "MQTTClient.h"
#include "HTS221Sensor.h"

// Definitions ---------------------------------------------------------

// Change it with your WiFi network name
//#define WIFI_NETWORK_NAME       "farnell_iot_lab"
#define WIFI_NETWORK_NAME       "rucola"
// Change it with your WiFi password name
//#define WIFI_NETWORK_PASSWORD   "smartlab"
#define WIFI_NETWORK_PASSWORD   "Rosmarino_10"
#define WIFI_SECURITY           NSAPI_SECURITY_WPA_WPA2

#define COMM_PROTO              0

// scegliere il protocollo di trasporto dati
// COMM_PROTO = 0 -> accesso MQTT (default);
// COMM_PROTO = 1 -> access  HTTP;
// COMM_PROTO = 2 -> accesso COAP;
#ifndef COMM_PROTO
#define COMM_PROTO 0
#endif

#if COMM_PROTO==0

#define MQTT_HOST               "demo.thingsboard.io"
#define MQTT_PORT               1883
#define MQTT_TOPIC              "v1/devices/me/telemetry"
#define DEVICE_ACCESS_TOKEN     "nNcsYA9xXL8OsEmHd6Cq"

#endif


#if COMM_PROTO==0
class MQTTNetwork
{
public:
    MQTTNetwork(NetworkInterface* aNetwork) : network(aNetwork) {
        socket = new TCPSocket();
    }

    ~MQTTNetwork() {
        delete socket;
    }

    int read(unsigned char* buffer, int len, int timeout) {
        return socket->recv(buffer, len);
    }

    int write(unsigned char* buffer, int len, int timeout) {
        return socket->send(buffer, len);
    }

    int connect(const char* hostname, int port) {
        socket->open(network);
        return socket->connect(hostname, port);
    }

    int disconnect() {
        return socket->close();
    }

private:
    NetworkInterface* network;
    TCPSocket* socket;
};
#endif

int main()
{
    int count = 0;

    ISM43362Interface wifi(MBED_CONF_APP_WIFI_SPI_MOSI,
            MBED_CONF_APP_WIFI_SPI_MISO,
            MBED_CONF_APP_WIFI_SPI_SCLK,
            MBED_CONF_APP_WIFI_SPI_NSS,
            MBED_CONF_APP_WIFI_RESET,
            MBED_CONF_APP_WIFI_DATAREADY,
            MBED_CONF_APP_WIFI_WAKEUP, false);

    // Scanning WiFi networks ------------------------------------------

    WiFiAccessPoint *ap;

    count = wifi.scan(NULL, 0);
    printf("%d networks available.\n", count);

    /* Limit number of network arbitrary to 15 */
    count = count < 15 ? count : 15;

    ap = new WiFiAccessPoint[count];
    count = wifi.scan(ap, count);
    for (int i = 0; i < count; i++) {
        printf("Network: %s RSSI: %hhd\n", ap[i].get_ssid(), ap[i].get_rssi());
    }

    delete[] ap;

    // Connecting to WiFi network --------------------------------------

    printf("\nConnecting to %s...\n", WIFI_NETWORK_NAME);
    int ret = wifi.connect(WIFI_NETWORK_NAME, WIFI_NETWORK_PASSWORD, WIFI_SECURITY);
    if (ret != 0) {
        printf("\nConnection error\n");
        return -1;
    }

    printf("Success\n\n");
    printf("MAC: %s\n", wifi.get_mac_address());
    printf("IP: %s\n", wifi.get_ip_address());
    printf("Netmask: %s\n", wifi.get_netmask());
    printf("Gateway: %s\n", wifi.get_gateway());
    printf("RSSI: %d\n\n", wifi.get_rssi());

#if COMM_PROTO==0
    printf("Collegamento MQTT server: " MQTT_HOST  "\n");

    MQTTNetwork network(&wifi);
    MQTT::Client<MQTTNetwork, Countdown> client(network);

    char assess_token[] = DEVICE_ACCESS_TOKEN;

    MQTTPacket_connectData conn_data = MQTTPacket_connectData_initializer;
    conn_data.username.cstring = assess_token;

    if (network.connect(MQTT_HOST, MQTT_PORT) < 0) {
      printf("failed to connect to " MQTT_HOST  "\n");
      return -1;
    }

    if (client.connect(conn_data) < 0) {
      printf("failed to send MQTT connect message\n");
      return -1;
    }

    printf("successfully connect to MQTT server!\n");
#endif

// Initialize sensors --------------------------------------------------

uint8_t id;
DevI2C i2c_2(PB_11, PB_10);
HTS221Sensor hum_temp(&i2c_2);

hum_temp.init(NULL);
hum_temp.enable();
hum_temp.read_id(&id);
printf("HTS221  humidity & temperature sensor = 0x%X\r\n", id);

// Get data from sensors -----------------------------------------------

for (;;) {
    float temp, humid;

    hum_temp.get_temperature(&temp);
    hum_temp.get_humidity(&humid);
    printf("HTS221:  [temp] %.2f C, [hum]   %.2f%%\r\n", temp, humid);

    char msg[256];
    int n = snprintf(msg, sizeof(msg),
        "{\"temperature\":%f, \"humidity\":%f, \"active\": false}",
        temp, humid);

    void *payload = reinterpret_cast<void*>(msg);
    size_t payload_len = n;

    printf("publish to: %s %d %s\r\n", MQTT_HOST, MQTT_PORT, MQTT_TOPIC);
#if COMM_PROTO==0
    if (client.publish(MQTT_TOPIC, payload, n) < 0) {
        printf("failed to publish MQTT message");
    }
#endif
    wait_ms(5000);
}


//client.disconnect();
//wifi.disconnect();

//printf("\ndone\n");
//return 0;

}