Arduino esp8266 home weather station

Clock with auto backlight, NTP time-sync, measuring CO2, humidity, temperature, atmospheric pressure and Blynk or Cayenne synchronization.

Components

• CO2 Sensor MH-Z19
• ESP8266 (NodeMCU ESP12+ based)
• ST7920 128x64 LCD display
• Humidity/Pressure/Temperature BME280
• Photoresistor 5528 LDR
• NPN transistor P2N2222A or similar
• Buttons, resistors, wires, enclosure

Optional

• TL431 for better display contrast adjust. (attention! need to cut JP3 on display, see photos)

Photos:

Version with 3D-printed case and buttons

Version with purchased case and buttons

Version with 3D-printed case and buttons from ffnull