Abstract: This article explains the principle and constitution of embedded RFID middleware based on ARM, and how to use SQLite to save, filter and smooth data. It also introduces the characteristic of SLQite and the demand of embedded system of RFID middleware to database’s performance. The dynamic alternation between clients and SQLite is built by C API that is offered by SQLite, which is used by form technology. At last, it introduces the optimized design of SQLite.

Key words: SQLite, embedded system, RFID, middleware