https://github.com/adafruit/Adafruit-PCD8544-Nokia-5110-LCD-library
https://github.com/olikraus/u8glib
http://henrysbench.capnfatz.com/henrys-bench/arduino-displays/arduino-nokia-5110-with-u8glib-tutorial/
https://learn.adafruit.com/nokia-5110-3310-monochrome-lcd/overview
2 €
Aliexpress