ESP32-based home clock
Features:
- Displaying current time at big LED clock
- Time is periodically updated from SNTP server
- Date/Time are also stored in external RTC with its battery, so time is available instantly after power on, even if WIFI is not available
- Displaying current date at OLED
- Displaying current temperature and 6/12h weather forecast using Yandex.Weather data
- Displaying current outside temperature from a wireless sensor (the same as this devise do: https://github.com/iliasam/EinkTemperatureMonitor )
- Displaying measured CO2 value and drawing CO2 graph
- Displaying sunrise/sunset
- Brightness of the OLED and LED is controlled automatically by internal light sensor.
Used parts:
- ESP-WROOM-32 module
- HC-12 radio module
- MH-Z19B CO2 sensor
- Photoresistor
- 2 buttons
- 4 7-segments 1″ LED displays + MAX7219
- WEX012864 2.7″ OLED
- 5V AC-DC power supply module
Developed in Visual Studio Code and ESP-IDF framework.
Photo of the device:
Displaying CO2 graph:
