Hi, I have a few questions regarding DS18S20.
I am using pwowfs to read the data. Among the parameters it can read is 'present', but how can this return anything other than 1? If the device is not present then the read fails. Have I missed something here? I need to read the state of a pressure switch, just an on/off contact. I looked for a 1-wire sensor to connect it to, but then I thought that as DS18S20's are so cheap I could use one of those, connect in series with the signal line and if the device reads then the pressure switch contact is closed, if it doesn't read then the contact is open. Any problems with this idea? Is there a better way to do it? As part of these investigations it seems to me that the parameter 'power' does not actually mean that the device has external power, it means that the ground lead is not connected to the VDD (+5v) lead. Can anyone confirm this? Thanks Mick Sulley ------------------------------------------------------------------------------ _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
