| #include <LiquidCrystal_I2C.h> | |
| #include <FlexiTimer2.h> // Contains FlexiTimer2 Library | |
| // initialize the library with the numbers of the interface pins | |
| LiquidCrystal_I2C lcd(0x27, 16, 2); | |
| int tempPin = 0; // define the pin of temperature sensor | |
| float tempVal; // define a variable to store temperature value | |
| int hour, minute, second; // define variables stored record time | |
| void setup() { | |
| lcd.init(); // initialize the lcd | |
| lcd.backlight(); // Turn on backlight | |
| startingAnimation(); // display a dynamic start screen | |
| FlexiTimer2::set(1000, timerInt); // configure the timer and interrupt function | |
| FlexiTimer2::start(); // start timer | |
| Serial.begin(115200); // initialize serial port with baud rate 9600 | |
| Serial.println("Input hour,minute,second to set time."); | |
| } | |
| void loop() { | |
| // Get temperature | |
| tempVal = getTemp(); | |
| if (second >= 60) { // when seconds is equal to 60, minutes plus 1 | |
| second = 0; | |
| minute++; | |
| if (minute >= 60) { // when minutes is equal to 60, hours plus 1 | |
| minute = 0; | |
| hour++; | |
| if (hour >= 24) { // when hours is equal to 24, hours turn to zero | |
| hour = 0; | |
| } | |
| } | |
| } | |
| lcdDisplay(); // display temperature and time information on LCD | |
| delay(200); | |
| } | |
| void startingAnimation() { | |
| for (int i = 0; i < 16; i++) { | |
| lcd.scrollDisplayRight(); | |
| } | |
| lcd.print("starting..."); | |
| for (int i = 0; i < 16; i++) { | |
| lcd.scrollDisplayLeft(); | |
| delay(300); | |
| } | |
| lcd.clear(); | |
| } | |
| // the timer interrupt function of FlexiTimer2 is executed every 1s | |
| void timerInt() { | |
| second++; // second plus 1 | |
| } | |
| // serial port interrupt function | |
| void serialEvent() { | |
| int inInt[3]; // define an array to save the received serial data | |
| while (Serial.available()) { | |
| for (int i = 0; i < 3; i++) { | |
| inInt = Serial.parseInt(); // receive 3 integer data |
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[TD] }[/TD]
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[TD][/TD]
[TD] // print the received data for confirmation[/TD]
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[TD] Serial.print("Your input is: ");[/TD]
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[TD] Serial.print(inInt[0]);[/TD]
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[TD] Serial.print(", ");[/TD]
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[TD] Serial.print(inInt[1]);[/TD]
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[TD] Serial.print(", ");[/TD]
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[TD] Serial.println(inInt[2]);[/TD]
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[TD] // use received data to adjust time[/TD]
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[TD] hour = inInt[0];[/TD]
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[TD] minute = inInt[1];[/TD]
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[TD] second = inInt[2];[/TD]
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[TD] // print the modified time[/TD]
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[TD] Serial.print("Time now is: ");[/TD]
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[TD] Serial.print(hour / 10);[/TD]
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[TD] Serial.print(hour % 10);[/TD]
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[TD] Serial.print(':');[/TD]
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[TD] Serial.print(minute / 10);[/TD]
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[TD] Serial.print(minute % 10);[/TD]
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[TD] Serial.print(':');[/TD]
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[TD] Serial.print(second / 10);[/TD]
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[TD] Serial.println(second % 10);[/TD]
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[TD] }[/TD]
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[TD]}[/TD]
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[TD]// function used by LCD1602 to display time and temperature[/TD]
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[TD]void lcdDisplay() {[/TD]
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[TD] lcd.setCursor(0, 0); // set the cursor to (0,0) (first column,first row).[/TD]
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[TD] lcd.print("TEMP: "); // display temperature information[/TD]
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[TD] lcd.print(tempVal);[/TD]
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[TD] lcd.print("C");[/TD]
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[TD] lcd.setCursor(0, 1); // set the cursor to (0,1) (first column,second row)[/TD]
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[TD] lcd.print("TIME: "); // display time information[/TD]
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[TD] lcd.print(hour / 10);[/TD]
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[TD] lcd.print(hour % 10);[/TD]
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[TD] lcd.print(':');[/TD]
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[TD] lcd.print(minute / 10);[/TD]
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[TD] lcd.print(minute % 10);[/TD]
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[TD] lcd.print(':');[/TD]
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[TD] lcd.print(second / 10);[/TD]
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[TD] lcd.print(second % 10);[/TD]
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[TD]}[/TD]
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[TD]// function used to get temperature[/TD]
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[TD]float getTemp() {[/TD]
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[TD] // Convert analog value of tempPin into digital value[/TD]
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[TD] int adcVal = analogRead(tempPin);[/TD]
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[TD] // Calculate voltage[/TD]
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[TD] float v = adcVal * 5.0 / 1024;[/TD]
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[TD] // Calculate resistance value of thermistor[/TD]
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[TD] float Rt = 10 * v / (5 - v);[/TD]
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[TD] // Calculate temperature (Kelvin)[/TD]
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[TD] float tempK = 1 / (log(Rt / 10) / 3950 + 1 / (273.15 + 25));[/TD]
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[TD] // Calculate temperature (Celsius)[/TD]
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[TD] return tempK - 273.15;[/TD]
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[TD]}[/TD]
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