Adafruit Industries, Unique & fun DIY electronics and kits Standard LCD 20x4 + extras : ID 198 - Standard HD44780 LCDs are useful for creating standalone projects. It also has the same 16-pin header, allowing you to unplug the 16x2 LCD and plug in the 20x4 without changing any wiring. It is the only command which the LCD module will accept while a previous command is still being processed. The 20x4 LCD with an I2C adapter uses the common HD44780 chipset.
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