Found a $12 bluetooth enabled thermometer/hygrometer (Govee) and wrote some code to publish the readings to MQTT and Home Assistant : r/homeautomation
Price: $ 13.50
4.5(189)
Govee Smart Hygrometer Thermometer, Bluetooth Humidity Temperature Gauge with Remote Monitor, Large LCD Display, Notification Alert with Max Min Records, 2 Years Data Storage Export, Black
Govee WiFi Hygrometer Thermometer, Wireless Temperature Humidity Sensor with App Alerts, for Greenhouse, Basement, Pets, Garage, 1 Sensor and 1 Gateway (Supports 2.4G WiFi) : Patio, Lawn & Garden
Solved] Govee WiFi Thermometer Hygrometer H5179 Intergration Support - Configuration - Home Assistant Community
Btw i use armtix : r/linuxmasterrace
Govee BLE Thermometer/Hygrometer sensor - Custom Integrations - Home Assistant Community
Govee BLE Thermometer/Hygrometer sensor - Custom Integrations - Home Assistant Community
Best temp/humidity sensors for my needs : r/smarthome
Govee BLE Thermometer/Hygrometer sensor - Custom Integrations - Home Assistant Community
Govee Bluetooth Thermometer Hygrometer, Instant Read Indoor Digital Humidity Temperature Monitor with APP Alert, 2 Year Data Record and Export, for Home Greenhouse Incubator Humidor and Nursery Room : Patio, Lawn