Thank you guys for the quick replies, I appreciate it! I should have included more details…
I have three lines that circle a property and I’d like to put sensors at various locations. For several reasons including cost, weather, distance and reliability I’d like to make use of these existing wires. Since there are 3 of them I’ll use 2 for power which leaves one for a ‘communication bus’. My “requirements” are:
- One way communication only from one node to the others downstream. Which means all nodes will hang off the same ‘bus’ and will pickup their messages based on some sort of identifier I send as part of the datagram.
- Transmission speed can be slow.
- Wired communications only, no wireless.
The above is what led me to my original ask above. Since I have one control line I was thinking along the lines of sending messages/commands in some sort of modified Morse Code (for lack of a better description) that all nodes would receive and then only act upon if they saw their identifier. To do this I was thinking of just signaling the control line high/low but I’m stuck on how to decode this on the receiver side(s). Something along the lines of a multipress action/timings for buttons is what came to mind initially but I don’t think it is flexible enough for my needs.
Hopefully this helps clarify the ask/problem statement.
Thank you all once again!