I recently wrote a German tutorial (https://plantprogrammer.de/esp32-rfid-and-mqtt/) that describes on how to use an ESP to publish UIDs of RFID-tags into an MQTT ...

In this tutorial, we will design a system to read the RFID cards using STM32 and RFID Reader. RFID stands for Radio Frequency Identification which reads information by using radio frequencies. RFID’s ...