i am having errors with esp32 and rfid Mfrc522 card reader

Question

I managed to make my esp32 and mfrc522 card reader work before. but Now first i got this error,

*'/esptool.exe' is not recognized as an internal or external command, operable program or batch file.

exit status 1

Compilation error: exit status 1*

after some research, i found out tht uninstalling and installing the library might work. I did tht..and i am sure tht i installed the proper versions of the libraries. but after this im getting multiple errors with the rfid mfrc522 card reader.

In file included from C:\Users\akhila\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.8\cores\esp32/Arduino.h:176, from c:\Users\akhila\OneDrive\Documents\Arduino\libraries\MFRC522\src\MFRC522.cpp:7: c:\Users\akhila\OneDrive\Documents\Arduino\libraries\MFRC522\src\MFRC522.cpp: In static member function 'static const __FlashStringHelper MFRC522::GetStatusCodeName(MFRC522::StatusCode)': C:\Users\akhila\AppData\Local\Arduino15\packages\esp32\hardware\esp32\2.0.8\cores\esp32/WString.h:38:42: error: cannot convert 'const char*' to 'const __FlashStringHelper*' in return #define F(string_literal) (string_literal) ^ c:\Users\akhila\OneDrive\Documents\Arduino\libraries\MFRC522\src\MFRC522.cpp:1303:29: note: in expansion of macro 'F' case STATUS_OK: return F("Success."); ^*

Please tell me what i can do to get rid of these errors or if someone else has encountered this problem.

i am trying to print the rfid number of a card on the arduino serial montior. But the program is not compiling

Answer 1

Looks like a breaking change was introduced in ESP core 2.0.8, downgrading to 2.0.7 worked for me.