Hello everyone.
I am a beginner and I have just acquired a development card. I'm trying to get the lcd screen to work but I can't get anything to display on it. The squares are not displayed even though the screen is switched on and connected.
I am using an elegoo development board.
Please find attached the wiring diagram and my code below.
Best regards.
/*
LiquidCrystal Library -
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 7
- LCD Enable pin to digital pin 8
- LCD D4 pin to digital pin 9
- LCD D5 pin to digital pin 10
- LCD D6 pin to digital pin 11
- LCD D7 pin to digital pin 12
- 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)
// include the library code:
#include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(7, 8, 9, 10, 11, 12);
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// 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);
}
