there was a mod called "Biter Detector Sentinel Combinator" in 1.1. now i have problems in porting it into Factorio 2.0. what it does in general is adding 2 sensors to the game. one can detect biters, and one can even specify the type. the biter alarm is the one which is, in my opinion, very useful to be able to use circuits to toggle other machinery if an biter attack is incoming. i had a 2000SPM mega base surrounded with a big wall with the alarm integrated, so it was sufficiently programmed to be not too much of a burden even under those circumstances.
(not bragging but it was an epic build over 400h of playtime)
https://imgur.com/a/CP8zPPq
https://mods.factorio.com/mod/Biter_Det ... Combinator
i dont have programming skills but i can contribute to the artwork. in my dayjob im a designer so i can create sprites if needed. i just need a programmer able to add the biter alarm
anybody interested in collaboration?