Tags: LCD, Keypad, Shield, LCD1602, Module, Display, Board, for, Arduino

LCD Keypad Shield LCD1602 Module Display Board

  • 19.00 AED

    29.00 AED

    • Ex Tax:19.00 AED
    • Brands techmaze
    • Product Code: Digital
    • Availability: In Stock
    This is the LCD1602 keypad shield v2.0 PCB. This mainboard adopt new high-quality 2 lines16 characters LCD, not only has the contrast adjustment knob, the backlight selector switch, 4 direction keys, 1 select keys and a reset button, and four sensor analog interfaces , RB URF v1.1 ultrasonic sensor ..
    This is the LCD1602 keypad shield v2.0 PCB. This mainboard adopt new high-quality 2 lines16 characters LCD, not only has the contrast adjustment knob, the backlight selector switch, 4 direction keys, 1 select keys and a reset button, and four sensor analog interfaces , RB URF v1.1 ultrasonic sensor interface, bluetooth module interface, APC220 wireless digital communication interface, easy-to-use for independent expansion. Tested in Arduino  UNO, MEGA1280, MEGA2560 board.

    Features:


    Input Voltage: 5V
    Model: HD4478X 1602 LCD
    Backlight: Blue with White letters and adjustable light.
    Library: 4 Bit Arduino LCD Library

      1602 LCD Keypad Shield Basic Code


    This video shows you how to use the 1602 LCD Keypad Shield Basic Code 1-LCD4Bit_mod Download

    Source code for 1602 LCD Keypad Shield for Arduino

    
     
    //example use of LCD4Bit_mod library
    // downloaded from https://github.com/douggilliland/lb-Arduino-Code/tree/master/libraries/LCD4Bit_mod
    // October 01, 2017 this example will work with 1602 LCD keypad shield.
    // Code used for YouTube video for Robojax channel
    // Watch the video https://youtu.be/naSSiS_9rEw
    
    
    #include <LCD4Bit_mod.h> 
    //create object to control an LCD.  
    //number of lines in display=1
    LCD4Bit_mod lcd = LCD4Bit_mod(2); 
    
    //Key message
    char msgs[5][15] = {"Right Key OK ", 
                        "Up Key OK    ", 
                        "Down Key OK  ", 
                        "Left Key OK  ", 
                        "Select Key OK" };
    int  adc_key_val[5] ={30, 150, 360, 535, 760 };
    int NUM_KEYS = 5;
    int adc_key_in;
    int key=-1;
    int oldkey=-1;
    
    void setup() { 
      pinMode(13, OUTPUT);  //we'll use the debug LED to output a heartbeat
    
      lcd.init();
      //optionally, now set up our application-specific display settings, overriding whatever the lcd did in lcd.init()
      //lcd.commandWrite(0x0F);//cursor on, display on, blink on.  (nasty!)
       lcd.clear();
      lcd.printIn("Robojax.com Testing");
        
    }
    
    void loop() {
    
    	adc_key_in = analogRead(0);    // read the value from the sensor  
      digitalWrite(13, HIGH);  
      key = get_key(adc_key_in);		        // convert into key press
    	
    	if (key != oldkey)				    // if keypress is detected
    	{
        delay(50);		// wait for debounce time
    		adc_key_in = analogRead(0);    // read the value from the sensor  
        key = get_key(adc_key_in);		        // convert into key press
        if (key != oldkey)				
        {			
          oldkey = key;
          if (key >=0){
          lcd.cursorTo(2, 0);  //line=2, x=0
      			lcd.printIn(msgs[key]);
          }
        }
      }
      
      //delay(1000);
      digitalWrite(13, LOW);
      
    
     
      
      
    }
    
    // Convert ADC value to key number
    int get_key(unsigned int input)
    {
    	int k;
        
    	for (k = 0; k < NUM_KEYS; k++)
    	{
    		if (input < adc_key_val[k])
    		{
               
        return k;
            }
    	}
        
        if (k >= NUM_KEYS)
            k = -1;     // No valid key pressed
        
        return k;
    }
    
       


    Tags: Arduino; display; lcd; module; shield

    There are no reviews for this product.

    Write a review

    Please login or register to review