#include #include #include #include "mqtt.h" bool leave = false; #define LOG(fmt, ...) fprintf(stdout, fmt "\n", ## __VA_ARGS__) bool err_handler(MQTTHandle *handle, MQTTErrorCode error) { LOG("Error received: %d", error); return 1; } void callback(MQTTHandle *handle, char *topic, char *payload) { LOG("Received publish: %s -> %s", topic, payload); MQTTStatus result = mqtt_unsubscribe(handle, "testsuite/mqtt/test"); if (result != MQTT_STATUS_OK) { LOG("Could not unsubscribe test"); exit(1); } result = mqtt_unsubscribe(handle, "testsuite/mqtt/test2"); if (result != MQTT_STATUS_OK) { LOG("Could not unsubscribe test 2"); exit(1); } sleep(1); leave = true; } void mqtt_connected(MQTTHandle *handle, void *context) { LOG("Connected!"); LOG("Trying subscribe on testsuite/mqtt/test..."); MQTTStatus result = mqtt_subscribe(handle, "testsuite/mqtt/test", MQTT_QOS_0, callback); if (result != MQTT_STATUS_OK) { LOG("Could not subscribe test"); exit(1); } result = mqtt_subscribe(handle, "testsuite/mqtt/test2", MQTT_QOS_0, callback); if (result != MQTT_STATUS_OK) { LOG("Could not subscribe test 2"); exit(1); } } int main(int argc, char **argv) { MQTTConfig config = { 0 }; config.client_id = "libmqtt_testsuite"; config.hostname = "localhost"; config.clean_session = true; LOG("Trying to connect to %s...", config.hostname); MQTTHandle *mqtt = mqtt_connect(&config, mqtt_connected, NULL, err_handler); if (mqtt == NULL) { LOG("Connection failed!"); return 1; } while (!leave) { LOG("Waiting..."); sleep(1); } LOG("Disconnecting..."); mqtt_disconnect(mqtt, NULL, NULL); }