Hi Brian
is it possible to add the multifunction I/O module which has lots of potential to add one wire sensors, this module basically replaces the discontinued chips from Dallas using this module means you can connect all different types of sensors
please see links to the datasheets
and the website where the module can be purchased
don’t mind getting a module sent out to you if it helps
thank you
Mick
SWE6 Multifunction I/O Module
www.sheepwalkelectronics.co.uk/SWE6.php
www.sheepwalkelectronics.co.uk/datasheets/BAE0910-datasheet.pdf