Here's the video that Scott Mills of ScienceMob put together describing the process:
To do this, however, you either need to connect multiple devices up, to a single wire, and the way that we did this was via a custom board that Scott
put together to act as a 1-Wire hub:
The temperature sensors utilised the 1-wire standard, so Scott
could go off and build the sensors whilst Jerry programmed the Arduino to talk to them.