Abstract: Nowadays, streetlights in most areas are still in the stages of traditional control, on-site manual inspection, traditional circuit troubleshooting, and no unified management platform, resulting in huge energy waste. In view of the above situation, an automatic streetlight monitoring system based on LoRa and STM32 is designed. The system uses STM32 series MCU as the core processor, and realizes the data transmission between streetlights and the back-end server through 4G communication. The system adopts the LoRa cascade networking mode and is designed with Bluetooth interface to facilitate users’ on-site maintenance and parameter setting. The main functions of the system include real-time monitoring and control of streetlight status, real-time intelligent dimming, geographic location detection, environmental information data collection, real-time fault information detection and alarm, real-time power information detection and early warning, and other functions. Tests verify that the system is stable and reliable, with accurate data collection, and can be widely used in streetlight systems, which saves electric energy for the society, effectively improves the level of scientific management of streetlights, and improves the appearance of the area where the streetlights are located. 

Key words: STM32, automatic control, data collection, LoRa, fault detection