Mega board with ESP32 communication

I have a project to detect toxic gases using sensors contains 3 sensors and i build levels of LEDs 3green 3yallow 3red that light up by sensors values then i need to send data to firebase
so i want add esp32 to mega board to send data to firebase
what can i do in code
i don't have a lot time because to discussion day too close

It looks like You've got Yourself into an unpleasent situation.
Don't expect a helper to create code ready to use out of the lines You posted.
There is a special section, if You've got a good budget, to pay someone for work.

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