ESP32 Based Temperature and Humidity sensor
This sketch uses the ESP32 w/ Builtin OLED screen module Just like this one https://www.aliexpress.com/item/Lolin-ESP32-OLED-wemos-for-Arduino-ESP32-OLED-WiFi-Modules-Bluetooth-Dual-ESP-32-ESP-32S/32807531243.html
And a DHT-11 temperature and humidity sensor https://www.aliexpress.com/item/DHT11-DHT-11-Digital-Temperature-and-Humidity-Temperature-sensor-for-Arduino-Hot-Free-Shipping/32612842301.html
These libraries are required https://github.com/LilyGO/ESP32-OLED0.96-ssd1306 https://github.com/beegee-tokyo/DHTesp https://github.com/nkolban/ESP32_BLE_Arduino
The temp and humidity data will be broadcast via bluetooth to any connected devices.