notes on expressing an ESP32 microcontroller dev kit through a 16x2 LCD

Interfacing a 16x2 LCD with the ESP32 microcontroller is a common practice for displaying data directly from the microcontroller, enhancing user interaction in embedded systems. The ESP32, known for its robust processing capabilities and integrated Wi-Fi and Bluetooth, pairs effectively with LCD modules to present real-time information such as sensor readings, system statuses, or user prompts.

This post provides a practical guide on connecting a 16x2 LCD to an ESP32 detailing wiring connections, GPIO pins to use, and offers an example Arduino sketch utilizing the LiquidCrystal library to initialize the display and print messages.

Example

Materials

- ESP32 DevKitc

- USB cable

- LCD 16X2

- potenciometer

- breadboard

- wires

Setup

Sketch

// include the library code:

#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins

LiquidCrystal lcd(14, 12, 27, 26, 25, 33);

void setup() {

// set up the LCD's number of columns and rows:

lcd.begin(16, 2);

// Print a message to the LCD.

lcd.print("abcdefghijklm...");

}

void loop() {

// set the cursor to column 0, line 1

// (note: line 1 is the second row, since counting begins with 0):

lcd.setCursor(0, 1);

// print the number of seconds since reset:

lcd.print(millis() / 1000);

}