(for those interested) My requirement was to be able to identify line number which caused panic , and store information in a log file, when ESP32 reboots. I do not have access to the various ESP32s, which are owned by customers. So the panic could have taken place 1 day or several days ago. By stori...

Hello,
This code worked for me
https://github.com/alvarowolfx/ESP32QRCodeReader
Hope this helps

Configuration
ESP32-S3
Arduino IDE 1.8.19
arduino-esp32 core 2.0.14

So would it affect anything if I removed the code that will not be compiled?

Answer is no. In other words, you may remove the code which is not compiled (no impact)

If you are using ESP32CAM AI Thinker, the embedded camera is an OV2640 so only part of the code will be compiled/executed, see below. The bottom line is you could leave code as-is, it should be ok Note that frame size can take following values : frame size QQVGA(160x120),HQVGA(240x176),QVGA(320x240)...

As indicated here https://forum.m5stack.com/topic/838/a-fatal-error-occurred-md5-of-file-does-not-match-data-in-flash I managed to solve error "A fatal error occurred: MD5 of file does not match data in flash!" with following WRITE FLASH command : esptool.py --port <YOUR PORT> write_flash_status --n...