I've done quite a bit with the Nest module recently - added in discrete Home/Away inputs and feedback into the Simpl+ Nest Processor and also tidied the Simpl wrapper to account for UK Nests, including a Call Heat output (I'm in the UK).
From what I can see, you should be able to have multiple instances of the Simpl Module and you would simply add a startup pulse (use a delay of 20s on processor startup) to trigger the appropriate Thermostat Select input. Belt and braces, I'd also send the select pulse each time the user accesses their particular?Nest page, but from my experience, once a stat is selected, I've never seen it deselect.
Mark
