RFID Electronic Card Reader for Livestock Farming


IoT RFID technology, including electronic ear tags and RFID electronic card readers, has been applied to various stages of livestock farming. When selecting an RFID electronic card reader, what basic standards should be met?


Frequency Standard

ISO/IEC stipulates that livestock farming should use the low-frequency band (125KHz, 135KHz). Low-frequency reading is slower but more precise, while ultra-high-frequency can read in groups but is prone to missed reads and cross-reads. Therefore, low-frequency bands are more commonly used in the market at present.


Communication Protocol/Serial Port

Currently, RFID electronic card readers on the market mostly adopt RS485 and RS232 communication protocols. RS485 has a longer transmission distance and higher transmission rate compared to RS232.


The transmission signal level of RS232 is relatively high, requiring a level conversion circuit to connect with TTL circuits in applications, but its anti-interference ability is not as good as RS485. The signal level of the RS485 interface is much lower than that of the RS232 protocol, making it convenient to connect with TTL circuits, and its anti-interference ability is stronger than RS232.


Air Interface Standard

The ISO/IEC 180002 standard stipulates the physical interface for communication between livestock ear tags and readers. RFID readers should have the ability to communicate with both Type A (FDX) and Type B (HDX) tags. Therefore, many livestock RFID readers are also referred to as HDX/FDX readers.


Application Standard

The ISO/IEC application standards for livestock RFID should comply with ISO11784/11785 and ISO14223. The animal radio frequency identification code requires that the reader and electronic tag can mutually identify each other.