• MQTTConnectionStatus_t : core_mqtt.h
• MQTTPubAckType_t : core_mqtt.h
• MQTTPublishState_t : core_mqtt.h
• MQTTQoS_t : core_mqtt_serializer.h
• MQTTStatus_t : core_mqtt_serializer.h
• MQTTSubAckStatus_t : core_mqtt.h
• MQTTSubscriptionType_t : core_mqtt_serializer.c