This thesis presents the design and development of an RFID Diagnostic Module, which is intended to improve the understanding of the errors in the RFID sensor which the REER SPA research team working on it. The project involves the creation of multiple prototypes, laboratory measurements and tests, and the realization of the final prototype. The module utilizes Radio Frequency Identification (RFID) technology to streamline the diagnostic process, allowing for more precise and reliable testing results. The design process involved careful consideration of the specific requirements of the module, including the selection of appropriate components and circuitry design. The creation of multiple prototypes allowed for iterative improvements and optimization of the module's performance.