Guards permanently secure military dependences. However, the availability of personnel requires ensuring their cardiac health and location. To know, the current status of the guards are required to have updated health status data. In this context, the design, hardware, and software architecture of a device using the LoRa protocol are presented. The system monitors, controls, and registers the personnel’s position, and using a button allows requesting help in the case is required. The measured statistics validate if every guard has an appropriate heart rate, is in the assigned position, and requires collaboration. The results at the prototype level are satisfactory. Tests have been carried out in the Chilean Air Force. The project is in the process of validation by the responsible entities.