I am trying to built some sort of feedback system, where students for example or just people from the audience have to rate a presentation: The audience sees a question and they are supposed to have some sort of device in their hand which they can use to vote. Of course there are tons of ways to do it and thats what I am trying to figure out: which is the best. I started off by using the common nRF24L01+ module. One Arduino acts as the receiver and "processes" the data, the other ones are the handheld devices, which send the data. I would like, however, to only use one Arduino that receives all the data and not have an Arduino in every handheld device... I wish to have like three or four buttons on my transmitter. The receiving Arduino then is supposed to print out the results via processing.
I know now how to do all this with having Arduinos in the transmitter, but how can I achieve this without them? And do you think the nRF24L01+ is the right module to do this? I would be grateful for any ideas!