Receiving and treating multiple signals

[HenrikOlsson]

Hi Ken,
Are you saying that you will have 20 transmitters randomly transmitting data on the same channel/frequency?
I don't know much about modern radio tecniques but to me that sound sort of impossible. I mean if two or more nodes are transmitting at the same time, on the same channel/frequency you're going to get the equivalent of bus contention. If they are not transmitting on the same channel/frequency then how's the receiver going to "tune" to multiple carriers at once?

Do you have a link to the radios you intend to use?

My guess is that the easiset way is to use tranceivers in all nodes and a master/slave type network. Ie. the slaves never sends unless specifically asked to by the master.

Again, I don't that much about the details of modern radios so if someone else is of another opinion, please enlighten me!

/Henrik.

EDIT: Depending on the radio modules it might be possible to do something similar to what CAN does to prevent bus contention.