IoT-Based Smart Management of Healthcare Services in Hospital Buildings during COVID-19 and Future Pandemics

Algorithm 1

It shows the main process.

 /subscribe to MQTT broker /

 mqtt_subscribe(&client, topic, 0);

 / start publishing the time /

 printf(“%s listening for ‘%s’ messages.\n”, argv[0], topic);

 printf(“Press CTRL-D to exit.\n\n”);

 / block /

 while(fgetc(stdin) != EOF);

 / disconnect /

 printf(“\n%s disconnecting from %s\n”, argv[0], addr);

 sleep(1);

 / exit /

 exit_example(EXIT_SUCCESS, sockfd, &client_daemon);