Standard Gateway2 - have 2 of them. Why 2 ? - because I have big house - distance is problem and many users reported that if you have more 30 devices on one gateway, some isuues may arise. But I have seen comments that one is using one gateway with 45 devices without problems.
Yes, Temp sensors working great, only one thing - they report data only when temp changes or once in 30 minutes aproximately if nothing changes.
Check Xiaomi Mi Smart Home Binding and review https://community.openhab.org/t/mi-xiaomi-smart-home-bindings.
