Created
January 29, 2023 16:46
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LCD Display example code for PlatformIO
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/* | |
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 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 libraries that the Arduino IDE would not explicitly require | |
#include <Arduino.h> | |
#include <Wire.h> | |
// include the LCD display library | |
#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 | |
// this happens ONE TIME, since it's in the setup() function | |
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); | |
} | |
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