Hi,
My aim is to display the standard HelloWorld code on my 16x2 LCD display. So the first row will have the text hello world and the second line will have the time printed with the millis() function. I have tried lots of variations to get my code running and working and I don't think it is a problem with my LCD screen.
Problem 1: When I first uploaded the code which had the line lcd.begin(16,2), the text on my screen would barely be visible. I could only see it at an extreme angle. I then read a few posts on this forum (link: LCD 1602 Not readable from direct viewing angle - Displays - Arduino Forum) and understood that if I REMOVED lcd.begin(16,2) from my code, I would be able to see the text. This was true and now I can view the text.
Problem 2: HOWEVER..... this prevents me from initialising my lcd as a 16x2 lcd. The default is 16x1 and so I cannot activate the second row in my LCD. Please help and tell me what I can do so that I can see both my text and have both rows working in my LCD
/*
LiquidCrystal Library - Hello World
Demonstrates the use a 16x2 LCD display. The LiquidCrystal
library works with all LCD displays that are compatible with the
Hitachi HD44780 driver. There are many of them out there, and you
can usually tell them by the 16-pin interface.
This sketch prints "Hello World!" to the LCD
and shows the time.
The circuit:
* LCD RS pin to digital pin 12
* LCD Enable pin to digital pin 11
* LCD D4 pin to digital pin 5
* LCD D5 pin to digital pin 4
* LCD D6 pin to digital pin 3
* LCD D7 pin to digital pin 2
* LCD R/W pin to ground
* LCD VSS pin to ground
* LCD VCC pin to 5V
* 10K resistor:
* ends to +5V and ground
* wiper to LCD VO pin (pin 3)
http://www.arduino.cc/en/Tutorial/LiquidCrystalHelloWorld
*/
// include the library code:
#include <LiquidCrystal.h>
// initialize the library by associating any needed LCD interface pin
// with the arduino pin number it is connected to
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
void setup() {
// set up the LCD's number of columns and rows:
//lcd.begin(16, 2); //I HAVE REMOVED THIS LINE
// Print a message to the LCD.
lcd.print("hello, world!");
}
void loop() {
// set the cursor to column 0, line 1
// (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 1);
// print the number of seconds since reset:
lcd.print(millis() / 1000);
}
