The HSJ641B application guide from Guangzhou HuiSiJia Intelligent Technology details hardware interfaces, UART communication, ISO15693 protocol support, and…
The HSJ641B is a 13.56 MHz ISO15693 RFID read/write module that supports NXP ICODE.SL2 and TI Tag‑it tags. It features a UART interface (19200 bps), a detachable antenna, 64 × 4‑byte memory (256 bytes total), a read distance of 100‑130 mm, and a built‑in watchdog for reliable operation.
The guide provides a complete description of the module’s hardware connections, UART pin definitions, command set, data frame structure, and troubleshooting steps. It also includes mechanical drawings, antenna wiring, auxiliary output usage, and regulatory notes for developers integrating the module into anti‑counterfeit, logistics, or personnel‑identification systems. This manual is written in Chinese.