library for driving character LCD in 4-bit mode (HD44780, ST7066U & compatible) supports 16x2, 20x2, 20x4 & 40x2 uses R/W pin for timing rather than delays
library for driving character LCD in 4-bit mode (HD44780, ST7066U & compatible) supports 16x2, 20x2, 20x4 & 40x2 uses R/W pin for timing rather than delays