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 ... in the data ...

However, if you use an LCD module with I2C interface, you only need 2 lines to process the display information. Now a days, it is not necessary ... the soldering work , get four jumper wires and ...