What is the cheapest temperature monitor I can get?

[vjv]

We are here to help, Start with the first post, it has good info. Good luck.

Xiaomi & Aqara Devices - Pairing & Keeping them connected

NOTE: Although many users have had great success using them, Xiaomi / Aqara ZigBee devices are NOT officially supported or guaranteed to work on the Hubitat Elevation platform. Because of their small size, simple design, and relatively low price, the Chinese home automation (HA) market ZigBee mesh network-based devices from Xiaomi / Aqara have seen an increasing level of popularity in other countries, where users are attempting to integrate them with their HA hub platform of choice, instead of t…