16×2 LCD display

Goal

Write two lines of text plus an incrementing counter.

Why it matters

The alphanumeric LCD is still the most common display in industry.

Steps

1. 01Add the 16×2 LCD (I²C, address 0x27).
2. 02Initialise the bus inside setup().
3. 03Write a title on line 0.
4. 04Show a counter refreshed every second on line 1.

Next tutorials

• Write on an OLED screen

  Display text on a 128×64 SSD1306 over the I²C bus.

• OLED: plotting a curve

  Display the A0 value live as a waveform.

• Colour TFT screen over SPI

  Drive a 240×240 ST7789 with the hardware SPI port.

• Scan the I²C bus

  List the addresses of the devices present on the bus.