There's also a receiver that must be connected to your boiler and relays the instruction from the thermostat, while the hub is the beating heart of Hive. It connects up to your router, then every Hive product, whether that's the thermostat, a smart light bulb, smart plug or EV changing...
The Hive SLR2 receiver half works. I have two thermostat entities, one which is for Central Heating, one which is for Hot Water. The Central Heating one allows me to set between Off/Heat and does work. The Hot Water one allows for: Off,Cool,Heat and Heat/Cool which is obviously not ...