#include <LiquidCrystal.h> // include the LiquidCrystal library
int LCDcol = 16; // number of LCD columns
int LCDrow = 4; // number of LCD rows
// associate lcd with LiquidCrystal library
LiquidCrystal lcd (2,3,4,5,6,7); // define LCD pins RS, E and D4 to D7
int tempPin = A0; // LM35DZ temperature sensor pin
int time = 0;
int reading;
float temp;
void setup()
{
lcd.begin(LCDcol, LCDrow); // define LCD dimensions
lcd.setCursor(0,0); // move cursor to start of first row
lcd.print("LCD to display"); // print first row "LCD to display"
lcd.setCursor(0,1); // move cursor to start of second row
lcd.print("time and temp"); // print second row "time and temp"
lcd.setCursor(3,2); // move cursor to insert "secs" on third row
lcd.print(" secs");
lcd.setCursor(5,3); // move cursor to insert "C" in fourth row
lcd.print(" C");
analogReference(INTERNAL); // set ADC voltage to 1.1V rather than 5V
}
void loop()
{
lcd.setCursor(0,2); // move cursor to start of third row
if(time < 100) lcd.print(" "); // spacing for 10s < time <100s
if(time < 10) lcd.print(" "); // spacing for time < 10s
lcd.print(time); // print time (s)
time++; // increment time
reading = analogRead(tempPin); // read temperature from sensor
temp = (reading * 110.0)/1023; // convert to Celsius given 1.1V range
lcd.setCursor(0,3); // move cursor to start of fourth row
lcd.print(temp); // print temperature
if(time>999) time = 0; // reset time to zero
delay (1000); // delay 1000ms
}