IRC is still, and will always be the best way to connect to other serious developers from around the world.
IRC was born during summer 1988 when Jarkko "WiZ" Oikarinen wrote the first IRC client and server at the University of Oulu, Finland (where he was working at the Department of Information Processing Science).
Jarkko intended to extend the BBS software he administrated at tolsun.oulu.fi, to allow news the usenet style, real time discussions and similar BBS features. The first part he implemented was the chat part, which he did with borrowed parts written by his friends Jyrki Kuoppala and Jukka Pihl. It was initially tested on a single machine, and according to the words from Jarkko himself "The birthday of IRC was in August 1988. The exact date is unknown, at the end of the month anyways.". The first IRC server was named tolsun.oulu.fi.
Jyrki Kuoppala pushed Jarkko to ask Oulu University to free the IRC code so that it also could be run outside of Oulu, and after they finally got it released, Jyrki Kuoppala immediately installed a server (which later became irc.cs.hut.fi). This was the first "irc network".
History of IRC (Internet Relay Chat)
Next in the asynchronous chat world for Arduboy is getting MattherMost, a FOSS slack app, up and going