it’s all about the controller portion of the access point.
me, i’m running an enterprise grade network at home based on Aruba Networks, which can handle up to 500+ associations per access point. when I try adding more than 14 devices to my “professional” Cisco Linksys WRVS4400N it simply craps out.
it takes a lot of effort from the controller side (mostly integrated into the AP) to keep track of the connections and te associations. it’s not about the data rate, it’s mostly about the associations and the effort the AP needs to put into maintaining the connection (encryption and such).
so there are two things to your question;
1)how many modules are we actually talking about, 10, 20, 50 100s?
if it’s 10 or 20, i would not be too concerned about performance with a single AP… it should work.
if you’re using more than 20, i’d plan on using one AP per 15 cores and just stick with the cheap AP’s. you could also invest in an enterprise grade network, but that would only save you in amount of AP’s to deploy, but it’s 10 or 20t imes as expensive as just buying cheap AP’s.
also, if you ahve that many cores, wouldn’t it be cheaper and easily to wire arduino’s with ehternet shields?