@stjohn I have plenty examples of multiple similar devices attached to one Arduino that you can use as a starting point. Check out my Multiplexer SmartApps and virtual device types in my github repository. Lots of discussions here as well which you will find helpful.
My hope is to add LAN connected support to my ST_Anything project, so you’d have the option of either the ThingShield or an Ethernet Shield to communicate with the ST Hub.
Longer term, port ST_Anything to Raspberry Pi and possibly Windows.