We might think that an AVR microcontroller – e.g. the ATMega328p adopted by the Arduino UNO boards – has the sufficient number of pins to manage an alphanumeric LCD. In a complex industrial machine ...

I connected the LCD display according to a slightly modified design of Arduino's tutorial, with LCD VSS to ground, LCD VCC to power, LCD RS pin to digital pin 7, LCD Enable pin to digital pin 6 ...