📟 How to connect clover LCD screen M235 to Arduino

📟 How to connect clover LCD screen M235 to Arduino

Daniil Zhuk

Clover Display M235 LCD screens and others like it were often used in copiers, fax machines, telephones, and other office equipment. Today, this screen is quite rare, and it is difficult to find documentation on it. And yet in this article, we will connect the Clover M235 LCD screen to the Arduino and make it work.

Instructions for connecting the Clover M235 LCD screen to the Arduino
We will need:

  • Arduino UNO or another compatible card;
  • LCD Clover Display M235;
  • 10 kΊ potentiometer;
  • connecting wires;
  • breadboard;

Clover Display M235 LCD Screen Connection Diagram

Clover Display M235 LCD screen wiring diagram is as shown. In fact, this is a standard connection scheme for LCD screens. The M235 LCD does not have a backlight, but you can adjust the contrast of characters with a 10 kΊ potentiometer.

Sketch for working with LCD screens

A sketch for displaying a message on the Clover M235 LCD screen is shown on the sidebar. It comes with the standard LiquidCrystal library for Arduino. Copy the sketch from the above frame or open through the menu: File > Samples > LiquidCrystal > HelloWorld.

#include <LiquidCrystal.h> 

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
  lcd.begin(16, 2);
  lcd.print("Hello, world");

void loop() {
  lcd.setCursor(0, 1); 
  lcd.print(millis() / 1000); 

We load the sketch into Arduino's memory: in older versions of the Arduino IDE, the sketch download option was in the File menu, in later versions it was moved to the Sketch menu. The combination of hotkeys remains the same: Ctrl + U. After the program is recorded in the memory of Arduino, disconnect the board from the computer.

Connecting the LCD screen to the Arduino

We will assemble the scheme on the breadboard.

Helpful advice
If after switching on the circuit, the inscription on the LCD screen of the Clover M235 is hard to read or not visible at all, then adjust the display contrast using a potentiometer.

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