For now, all of our tarantulas (full list here) live in separate containers within this Exo Terra Medium/Low Terrarium [$]. Heat comes from a couple of Zoo Med Large ReptiTherm UTHs [$] and a Zoo Med Nano Ceramic Heat Emitter [$]. Humidity is provided by a Zoo Med Repti Fogger [$]. These are controlled by a Zoo Med HygroTherm [$].
Someday when I’ve got time, I’m hoping to add sensors and relays to the Pi so that I can move control of the temperature and humidity to it and add some interesting monitoring data to this page.