To link a standard 16×2 LCD directly with the microcontroller, for instance Arduino, you would need atleast 6 I/O pins to talk to the LCD. However, if you use an LCD module with I2C interface, you ...

This articles describes how you can use I2C (TWI ... A4 and A5 on the Arduino board. The two 4.7K pull-up resistors must be used when using I2C communication. We use the serial monitor to display the ...