What is the status on external temperature sensors ?
I have found this old post from 2017
It leads to Sonoff TH10 which I believe needs mains power but isn’t electrical code compliant.
What are current options for external temperature sensors (I have 6 zones I would like to monitor) I would like something battery powered, with at least one reading per 5 minutes and that lasts at least 3 months on a battery charge. Is there such a thing ? (of course it should be wifi and mqtt compatible)