Nuclear science and technology are closely related to the lives of people. However, nuclear radiation may harm the health of the general public; hence, nuclear radiation monitoring must be strengthened. A wired nuclear radiation monitoring system has the characteristics of complex wiring, a long construction period, high cost, poor mobility, and more difficult troubleshooting.

This study aims to address the demand for convenient measurement and monitoring of gamma radiation fields.

Based on the LoRa wireless communication technology, a γ radiation monitoring system using silicon photomultiplier (SiPM) tube-scintillator detector was designed. The main functions of the system included data collection from the detector, data processing and transmission using a STM32 single-core processor. The collected data packaging and transmission were processed in STM32 microcontroller using the LoRa wireless communication module. Considering the possible channel congestion in the monitoring system and the frequent data transmission, a dynamic optimal path communication algorithm was designed to find the optimal reconnection path and realize the priority allocation of data transmission.

The test results show that the data transmission stability of γ radiation monitoring system based on LoRa is higher than 99.57%, and has the advantages of flexible networking, a further distance of transmission, low cost, and substantial expansion, hence has a broad reference prospect.