Arduino mega2560 firmware update via esp8266?

We have a project that uses esp8266 to communicate with the server through mqtt. Esp8266 communicates with Arduino mega2560.

If there is a bug in mega2560, it needs to be updated. Is there any way to update the firmware of mega2560 remotely.

Esp8266 can be updated remotely via WiFi. How to update mega2560?

At present, I'm still a novice. I'm not very familiar with all aspects. I used to do java development

I tried to update Arduino uno with esp8266 before, and passed https://github.com/rousir/Arduino-Serial-Uploader
Can achieve

Thank

Thanks,. I'll study it carefully

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