This project is based on an Arduino Nano with ATmega328p. Temperature and Humidity readings obtained from a DHTxx sensor are displayed on a 84x48 ("5110 Nokia") Display. In addition to that, a graph of the temperature of the last 60 seconds, 60 minutes or 60 hours will be drawn onto the display.
Two buttons can be used to select which readings are displayed or whether the backlight is: Always ON, Always OFF or Adaptive. A LDR is used for the Adaptive-mode.
Certain information, like the selected backlight-mode, will be saved in the internal EEPROM.
Both .ino files are required and must be in the same folder. (Some UI-text is still in German, but this is very easy to change ;))
Required libaries: https://github.com/adafruit/Adafruit-GFX-Library, https://github.com/adafruit/Adafruit-PCD8544-Nokia-5110-LCD-library and https://github.com/adafruit/DHT-sensor-library
I have published a 3D-printable case:
https://www.thingiverse.com/thing:2908971
Here is an image of the running prototype:
