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Post: [b]Quote from andrew[/b]I am not sure if owfs does support the active pullup mode. I just tried writing a python script to update the configuration register manually but after updating the register owfs refused to read from the 1 wire bus and restarting owfs resets the configuration register.It does have a configuration option for it, though this is poorly documented.[b]Quote from andrew[/b]The 1 Wire Pi should be able to read a DS18S20 in parasitic mode without enabling active pullup, I have a dev board with one of the DS18S20 iButton sensors connected to the DS2482-100 using a short cable and the temperature can be read using owfs.Interesting. How does that work? I thought the DS18S20 sensor required[i] [/i]a raised voltage on the data pin prior to being queried, with the energy needed to read out the value being stored in an internal capacitor? Aka, "active pullup".[b]Quote from andrew[/b]Can you check that you have the wires connected correctly on the sensor? You need to connect the DQ pin on the DS18S20 to OW on the 1 Wire Pi and GND to either GND or RT.I'm using the RJ-12 cable that came with my weather station, an AAG TAI8515. The other (non-parasitic) sensors on board (windspeed & wind-direction) work as they should. Only the thermometer remains stuck on 85 degrees.