The COVID-19 pandemic is still out there, and in mid-2022, diseases such as monkeypox and tomato flu outbreak in UK and India, respectively. Those diseases are also spread through physical contact. Therefore, it is critical to do social distancing, especially since the restrictions are no longer enforced. This study developed a system for self-monitoring and self-alarm when people approach within a radius of 1 meter on the university campuses environement. The distance monitoring system utilizes BLE on the ESP32 microcontroller. Based on the RSSI, a radius of 1 meter is detected with -71 dBm to -75 dBm RSSI. The Android app is designed using MIT Inventor to evaluate anyone who approaches in a day, and this can help trace if anyone is indicated to have COVID-19. Lastly, this device is designed with comfortable consideration in the user's pocket when sitting, standing, or driving a vehicle.