How to check the completion of writing the AT command firmware

[testman]

Hello, all!

I want to know how to confirm the completion of writing the AT command firmware.

I connect the microcomputer board and ESP32-WROOM-32D.
I control ESP32-WROOM-32D with the default AT command.
When I update the AT command's firmware, I want to confirm that the writing is completed correctly from microcomputer board.

Please advise me if there is a good how to confirm.
For example, can I confirm with the AT command?

Thank you.