Simple Arduino code used to show data on the lcd shield over a serial connection. Ideal to have the output of a script (Node/Ruby/Pyhon etc) shown on a pretty lcd screen

simple_lcd_serial.ino

/*
  LiquidCrystal Library - Serial Input
*/

/*
 This example code is in the public domain.
 
 http://arduino.cc/en/Tutorial/LiquidCrystalSerial
 */

// include the library code:
#include <LiquidCrystal.h>


char c[33];

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);

void setup(){
  // set up the LCD's number of columns and rows: 
  lcd.begin(16, 2);
  // initialize the serial communications:
  Serial.begin(9600);
}

void loop()
{
  // when characters arrive over the serial port...
  if (Serial.available()) {
    // wait a bit for the entire message to arrive
    delay(100);
    // clear the screen
    lcd.clear();
    // read all the available characters
    int i = 0;
    while (Serial.available() > 0) {
      c[i++] = Serial.read();
      //lcd.write();
      //data  += Serial.read();
      
    }
    // Clear the rest
    for(; i < 33; i++){
      c[i] = ' ';
    }
    
    //Print the first row
    for( i = 0; i < 16; i++){
      lcd.write(c[i]);
    }
    
    //Print the second row
    lcd.setCursor(0,1);
    for( i = 16; i < 33; i++){
      lcd.write(byte(c[i]));
    }
  }
  delay(100);
}