Prototype of Mobile Main Control Fire Alarm (MCFA) for Medium Fire Risk Areas as at automotive component production department in-service part room, is an active fire protection system that can be a solution to simplify and speed up the time of fire fighting and securing activity during fire accident using daily used media, that is smartphones. In this research, a system was created to detect fires due to smoke and flames, notify firefighters, show the real situation via a smartphone, and activate the fire extinguisher. The system uses an MQ-2 sensor as a smoke detector and a KY-026 sensor as a flame detector connected with Node MCU as the main component completed by an IP camera to monitor the actual condition of fire location. The system consists of an alarm that indicates a fire, fire location information, and a display of the actual conditions from a camera integrated into the MCFA mobile application. The application can control a relay to turn on/off a pump as a fire extinguisher works when the user wants it. The value of smoke concentrations used as an indicator of the occurrence of a fire is when it exceeds 2112 ppm, while the value of light intensity used is when it exceeds 35 lux. Result data of acquisition and monitoring are sent to an Android smartphone using a Wi-Fi network that can be accessed in real-time. From the test results, it is found that the farthest distance that a smoke detector can detect is 25 cm while the flame detector is 65 cm. The average time needed by the system from a notification time until the start extinguishes fire is 3,019 minutes.