Older version hardware Wiki (discontinued, now updated to V2)

• Operating Voltage: 5.0V
• 1602 blue background LCD (2 lines of 16 bytes)
• 5 key inputs
• Size: 54*84mm

Board Overview

Tutorial

This demo shows how to use 1602 RGB LCD shield.

Requirements

• Hardware

  • Arduino UNO x1
  • LCD Keypad Shield V2.0 x1

• Software

  • Arduino IDE V1.6.5 Click to Download Arduino IDE

Sample Code

The new Arduino IDE has built-in LiquidCrystal library to drive 1602 screen. If your Arduino IDE does not have this library, please follow the steps below to install it.

• Click the link to download library and reference files.

• Unzip this folder and copy it to the libraries folder under Arduino installation directory.

About how to install the library?

• Next, open the Arduino IDE and copy the following code to the IDE window. (Delete all contents in the IDE just opened!)
• Select the correct serial port and board (Arduino UNO).

#include <LiquidCrystal.h>
//LCD 上用于引脚
LiquidCrystal 的定义 lcd(8, 9, 4, 5, 6, 7);

// Define keys
int lcd_key = 0;
int adc_key_in = 0;

#define btnRIGHT 0
#define btnUP 1
#define btnDOWN 2
#define btnLEFT 3
#define btnSELECT 4
#define btnNONE 5

//Read the key value
int read_LCD_buttons() {
  adc_key_in = analogRead(0);  // 0 read the ADC from analog values
  // By setting different threshold, you can read the corresponding to the appropriate buttons
  if (adc_key_in > 1000) return btnNONE;
  if (adc_key_in < 50) return btnRIGHT;
  if (adc_key_in < 250) return btnUP;
  if (adc_key_in < 450) return btnDOWN;
  if (adc_key_in < 650) return btnLEFT;
  if (adc_key_in < 850) return btnSELECT;
  return btnNONE;
}

void setup() {
  lcd.begin(16, 2);  // Start
  lcd.setCursor(0, 0);
  lcd.print("Push the buttons");  //print“Push the buttons”
}

void loop() {
  lcd.setCursor(9, 1);
  lcd.print(millis() / 1000);  // Output wait


  lcd.setCursor(0, 1);           //
  lcd_key = read_LCD_buttons();  // Reading keys

  switch (lcd_key)  // Judge key
  {
    case btnRIGHT:
      {
        lcd.print("RIGHT ");
        break;
      }
    case btnLEFT:
      {
        lcd.print("LEFT ");
        break;
      }
    case btnUP:
      {
        lcd.print("UP ");
        break;
      }
    case btnDOWN:
      {
        lcd.print("DOWN ");
        break;
      }
    case btnSELECT:
      {
        lcd.print("SELECT");
        break;
      }

      {
        lcd.print("NONE ");
        break;
      }
  }

More Documents

• Arduino LiquidCrystal library
• LiquidCrystal
• LCD Keypad Shield V2.0 Schematic
• LCD Keypad Shield V2.0 Pin layout