Heltec Lora 32 v3 hardware Serial?

#1

I am working on a project and I have been stuck for a week, I am trying to do serial communication between the Heltec Lora 32 v3 and M6E nano RFID module using hardware serial so that the RFID reader can detect tag. The Heltec lora 32 V3 it says 3* UART where are those pins? Also what is the right way to initialize them dor serial communication.

Link to the RFID reader M6E nano with documents:

Here is the pin diagram for Heltec lora 32 v3

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Please kindly let me know.

#2

If you look at the Espressif docs for the MCU it will tell you which pins you can use for hardware serial and then map that over to the v3 pinout.