2 ms·
The way 485 addresses devices is... just to prepend an address byte. Or bytes. Whatever you want, really. The link layer, which RS-485 is, doesn't care. As oth
by exmadscientist 6y ago
The way 485 addresses devices is... just to prepend an address byte. Or bytes. Whatever you want, really. The link layer, which RS-485 is, doesn't care.
As others have said, RS-485 isn't really the way to do this. It looks like RS-232, but it's just close enough to mislead you while being far enough away to be a total nightmare. For example, any bus collisions have to be handled in software. A driver that has to recognize and deal with bus collisions looks very different from one for a dedicated line.
This rabbit hole is probably not worth going down.
- catblast01 6y agoPedantry in this case to be sure but Rs-485 lives quite nicely and cleanly at the physical layer of the osi model. All the stuff you mention like collisions and addresses and shit starts to be layer 2 and above.