Arduino Mega wifi support

[JulianStremel]

I just recently stumbled accross the arduino mega wifi r3.
This adds an esp8266 on the same board as the mega and serial3 connected to the esp8266.
If we would be able to support the esp8266 target for airbear those integrated boards would be a nice and cheap fit for wireless speeduinos i think.

Just wanted to get it out there for discussion.

[JulianStremel]

I already tried adding esp8266 support but for now the issue is a little too deep for my knowledge because some librarys have other apis then their esp32 counterpart.

[jfseaman]

Maybe a reason to hook up my Mega WiFi and dive into the code.

Well, I'm already into the code, just not very far. I have it working on a Seeed Xaio ESP32-C3 but it's not connected to a speeduino.

Fact is, I'm not certain how to connect it. Same with the bluetooth modules I got. That setup in TunerStudio MS is clear as mud to me.