Abstract: With the gradual development of e-commerce, retail self-service terminals (hereinafter referred to as self-service terminals) gradually appear in commercial application scenarios. However, the existing communication modules of self-service terminals have problems such as high cost, limited use occasions, low data security, etc. Their communication modes are mostly 4G or 5G networking modes, with high charges, large power consumption, and high comprehensive costs. Nowadays, NFC (Near Field Communication) mobile phones have been popularized, and networking communication methods such as "touch and touch" have become a low-cost and efficient way for equipment to transmit information. In view of the above situation, a data interaction scheme for retail self-service terminals based on NFC technology was developed, and explored a low-cost and high security IoT solution for retail self-service terminals.

Key words: Retail, Self-service terminal, NFC, IoT