A low frequency RFID temperature data logger

In this paper, the design and implementation of an RFID-like temperature datalogger prototype, based on ISO11784/11785 standard is presented. It was designed to communicate through an inductive coupling with a 134.2 kHz ISO compliant reader, similar to those regularly employed for livestock traceability. It uses a low power - low cost microcontroller and several discrete circuit elements for the activation signal detection, signal transmission and temperature measurement.