LED_Keypad_Shield_V1.0_SKU_DFR0382 - jimaobian/DFRobotWiki GitHub Wiki

LED Keypad Shield V1.0 SKU:DFR0382

Introduction

The LED Keypad Shield is an Arduino expansion shield with a 4 digit 8 segment digital tube display (common cathode). It has 5 buttons that can be used as menu select buttons or control buttons. It uses I2C to drive the digital tube for an easy user experience.

Specification

  • Arduino compatible
  • Working voltage: 5V
  • 4 digit 8 segment common cathode digital tube (0.56 inch)
  • 5 input buttons (Driving pin: A0)
  • Size: 53 * 54mm/2.05 * 2.12inches

Pin Definition
center 
                                       |--------------|-------------------------------------|--------------|---------------------------------------------------------------------------------------------------|---------|------------------------------------|---------|-----------------------------------------------------------------------|-----|-------|
                                       | **PIN Name** | **Description** |- align = "center" | Analog Pin 0 | Button (select, top, right, bottom, left) |- style="background-color:\#B7DDE8; " align = "center" | SCL(A5) | I2C clock line |- align = "center" | SDA(A4) | I2C data line |- style="background-color:\#B7DDE8; " align = "center" | RST | Reset |  |

Tutorial
#### Requirements

Connection Diagram

This module's pin alignments allow it to stack directly on top of an Arduino UNO or similar microcontroller

Sample Code

Please install the following libraries for this code to function.

LedKeypad Arduino library About Library installation.

#include <LedKeypad.h>

char brightness =0;
char buf[5]="2456";

void setup() {
  ledkeypad.begin(); /*Enable*/
  ledkeypad.setBrightness(0);/*Sets the brightness level*/
  ledkeypad.display(2015);/*Display data*/
  delay(5000);
  ledkeypad.display(buf);/*Display character for testing*/
  for(int i=0;i<4;i++){/*for testing*/
    ledkeypad.dotShow(i);
    delay(1000);
    ledkeypad.dotVanish(i);
  }
}

void loop() {
  unsigned char keyValue=0;
  keyValue = ledkeypad.getKey();/*Get key value*/
  switch(keyValue){
    case KEY_DOWN:
      buf[0]++;
      if(buf[0] > '9')
        buf[0] = '0';
      ledkeypad.display(0,buf[0]);
      break;

    case KEY_LEFT:
      buf[1]++;
      if(buf[1] > '9')
        buf[1] = '0';
      ledkeypad.display(1,buf[1]);
      break;

    case KEY_UP:
      buf[2]++;
      if(buf[2] > '9')
        buf[2] = '0';
      ledkeypad.display(2,buf[2]);
      break;

    case KEY_RIGHT:
      buf[3]++;
      if(buf[3] > '9')
        buf[3] = '0';
      ledkeypad.display(3,buf[3]);
      break;

    case KEY_SELECT:
      brightness++;
      if(brightness > 7)
        brightness = 0;
      ledkeypad.setBrightness(brightness);
      break;

    default:
      break;
 }
}

Result

The sample code is a simple clock for the module. Using the input buttons the time can be adjusted. Key functions are as follows:

button function
down The first digital tube +1
left The sencond digital tube +1
up The third digital tube +1
right The fourth digital tube +1
select adjusting brightness

More

link=http://www.dfrobot.com/ get it from dfrobot store or dfrobot distributor.