Hi, I have expanded my network to about 20 DS18?20's and all was fine. I am now trying to add some I/O using Embedded Data Systems D2P modules which use DS2406. I need to switch mains voltage so built circuits to switch relays with the D2P units.
The network is basically Cat 5 cable with some spurs off in 4 core phone cable. I had some concerns over power requirements a while back and decided to use 2 separate 5v power supplies, one for the sensor circuit and one for the relay circuits. I added one of the D2P units and it seemed OK, I then added a couple more and the network crashes. Using owfs and looking at the directory structure I see various things, maybe no devices at all then refresh and see a couple of the temperature devices, refresh again and see nothing, etc. The D2P unit that caused the crash was at the far end of the network, I unplugged it and plugged it in half way down and it worked. I put it back at the end and unplugged the relay +5v supply and it works (but obviously the relays don't work). Not sure if this diagram will get through, the circuit I have used is - I am really stuck here, I don't know what to do next. Can anyone help please? Thanks Mick
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