nuts and volts column#147

marzec309

Ok Jon Williams stated in column 147 that the nodes use a peer to peer protocol, But i don't see how this would be possible with his nodes. The TX line(Z-Y) of one node is wired to the TX line of all nodes that follow it. the same is true for the RX line(A-B). so it shouldn't be possible for one node to talk to anther. Right? You would need One configured as a master with its TX line tied to the RX line of all the following(slave) Nodes, And the RX line tied to the slaves TX lines. Right. and my final question is would it even be posible to use the full-Duplex Chip(max489) in a peer-to-peer setup? If so how would the network connection be made?

N&V Column #147:
www.parallax.com/Portals/0/Downloads/docs/cols/nv/vol8/col/nv147.pdf

kwinn

If you look at the bottom of page 3 of the article you will see that he used his PC as the master. Further down near the top of page 5 he says "the protocol is essentially peer to peer", meaning that any node can send to any other node. This would require that the data transmitted by a node is echoed to the receivers ( probably by the master ) for another node to be received.

marzec309

The master echoing the the slaves would make sense. Thanks that cleared up my confusion.