I have some sensors from each of which I need to - read a voltage - be able to switch them on. (They are powered by AC 220V power supply).
Distance to be covered is some 40 meters.
I don't want to use to many wires in order to achieve this.
Solutions I have been considering are as follows: - 1-wire protocol - it's quite simple but some people have reported quite a few problems;
- rs422, works well over long distances, but it might be a pricy solution.
In case I chose 1-wire protocol, how would I get my sensors connected to a 1-wire interface?
If rs422 is not too complicated and expansive I would go with this option as I might consider extending the network over some 200-250 metres in the future.
How would I connect my sensors to an rs422 interface? How would I get my Arduino talking with RS22?Have you tested any RS422 chips? I have seen quite a few of them online, but I am not sure which to choose.
Would it be too complicated to make an RS22 cable myself? I have looked on ebay and found only wires not long enough and too expansive.