My esp32 is connected to a relay, an Ethernet adapter, Buzzer and PN532 RFID Reader. I need to connect two RFID readers to my esp32. Currently one reader is using the HSU input. When trying to ...

Differences between RFID readers PN532. Version V3 that is available on the Aliexpress and V4 that is available only at Elechouse manufacturer including CE and FCC. PN532 RFID reader is a popular NFC ...