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HA compatible sensors for a terrarium?
(lemmy.sdf.org)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
I feel like your best bet is ESPHome and the ESP family of devices. Last time I checked you could get the parts for a project like this off Amazon (with spare parts) for under 20$.
https://esphome.io/
I agree if your diy an esp32 and a dht11 could easily handle those duties.
I use one with 2 DHT11s and two DS18B20s to monitor my HVAC temps.