#include <Keypad.h>
#include <ArduinoJson.h>
#include <LiquidCrystal_I2C.h>
#define I2C_ADDR 0x27
#define LCD_COLUMNS 16
#define LCD_LINES 2
uint8_t state;
uint8_t valIndex;
uint8_t cursorPos;
char entered_value [6];
const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char keys[ROWS][COLS] = {
{ '1', '2', '3', 'A' },
{ '4', '5', '6', 'B' },
{ '7', '8', '9', 'C' },
{ '*', '0', '#', 'D' }
};
uint8_t colPins[COLS] = { 1, 0, 3, 2 };
uint8_t rowPins[ROWS] = { 4, 5, 6, 7 };
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
String po="";
String ga="";
int spo=0;
int sga=0;
int sopo=10000;
int soga=10000;
void setup()
{
Wire.begin(18, 19);
lcd.init();
lcd.backlight();
lcd.clear();
lcd.print("Bo: ");
lcd.setCursor(0, 1);
lcd.print("Ga: ");
}
void loop()
{
char key = keypad.getKey();
switch (key) {
case 'A':
spo = 1;
sga = 0;
break;
case 'B':
spo = 0;
sga = 1;
break;
case 'C':
po = "";
ga = "";
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Bo: ");
lcd.print(po);
lcd.setCursor(0, 1);
lcd.print("Ga: ");
lcd.print(ga);
break;
case 'D':
lcd.clear();
spo = 0;
sga = 0;
if(po==""||ga=="")
{
lcd.clear();
lcd.setCursor(1, 0);
lcd.print("Vui long nhap");
lcd.setCursor(0, 1);
lcd.print("du lieu day du!");
}
else
{
lcd.clear();
lcd.setCursor(2, 0);
lcd.print("Luu du lieu");
lcd.setCursor(2, 1);
lcd.print("thanh cong!");
sopo = po.toInt();
soga = ga.toInt();
}
delay(3000);
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Bo: ");
lcd.print(po);
lcd.setCursor(0, 1);
lcd.print("Ga: ");
lcd.print(ga);
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
case '0':
if (spo == 1) {
po += key;
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Bo: ");
lcd.print(po);
lcd.setCursor(0, 1);
lcd.print("Ga: ");
lcd.print(ga);
}
if (sga == 1) {
ga += key;
lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Bo: ");
lcd.print(po);
lcd.setCursor(0, 1);
lcd.print("Ga: ");
lcd.print(ga);
}
break;
default:
// Không làm gì cả
break;
}
}