mosquitto

Mqtt- mosquitto basic function is not working

Asked by Gopal

Hai friends,
               i dont know what i do wrong.. am new in MQTT using mosquitto ... i need to develop client application ..but basic function is not working i compile that code means no error display and no printf including not working.pleae guide me...

 #include <stdio.h>
#include <mosquitto.h>
int main(int argc, char *argv[])
{
    char id[30];
    int i;
    char *host = "localhost";
    int port = 1883;
    int keepalive = 60;
    bool clean_session = true;
    struct mosquitto *mosq = NULL;
    int rc;
    rc = mosquitto_lib_init();
    printf("Connection Starting\n");
    return 0;
}

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Roger Light (roger.light) said : 		#1

At the moment all your code does is run the library initialisation. The documentation states the following regarding mosquitto_lib_init(): "Must be called before any other mosquitto functions." It runs e.g. winsock initialisation on Windows and/or OpenSSL initialisation if required. That is all.

I would suggest that you go back to the documentation and examples.

Revision history for this message
andypiper (andypiperuk) said : 		#2

Compiles and "works" for me:

$ gcc mqtt.c -l mosquitto -o mqttdemo
$ ./mqttdemo
Connection Starting

I would not expect to see anything more than this. All you do in the code is set some variables, and then initialise use of a library and print something to stdout. You never actually call any useful MQTT or mosquitto library code.

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