Arduino Thermometer with RTC Clock

  This is an update of the previous project TM1637 4-Digit Display Clock Arduino Project . I added a temperature & humidity sensor DHT11 or DHT22.

Schematics:

Source code:

	/* https://arduinogeeks.blogspot.com */
	/* Degital 24 hour time format clock by Arduino, TM1637 4 digit 7 segment display and DS32321 RTC.*/
	// Add libraries: RTClib and TM1637
	#include "RTClib.h"
	#include <TM1637Display.h>
	// Define the connections pins for TM1637 4 digit 7 segment display
	#define CLK 8
	#define DIO 9
	// Create rtc and display object
	RTC_DS3231 rtc;
	TM1637Display display = TM1637Display(CLK, DIO);
	#include <Adafruit_Sensor.h>
	#include <DHT.h>
	// Define the connections pins
	#define CLK 8
	#define DIO 9
	#define DHTPIN 5
	// Create variable
	int temperature_celsius;
	int temperature_fahrenheit;
	int humidity_read;
	// Create °C symbol
	const uint8_t celsius[] = {
	SEG_A | SEG_B | SEG_F | SEG_G, // Circle
	SEG_A | SEG_D | SEG_E | SEG_F // C
	};
	// Create °F symbol
	const uint8_t fahrenheit[] = {
	SEG_A | SEG_B | SEG_F | SEG_G, // Circle
	SEG_A | SEG_E | SEG_F | SEG_G // F
	};
	// Create H symbol
	const uint8_t humidity[] = {
	SEG_B | SEG_C | SEG_G | SEG_E | SEG_F // H
	};
	// Uncomment whatever type you're using!
	#define DHTTYPE DHT11 // DHT 11
	//#define DHTTYPE DHT22 // DHT 22 (AM2302)
	// Create dht object of type DHT:
	DHT dht = DHT(DHTPIN, DHTTYPE);
	void setup() {
	// Begin serial communication at a baud rate of 9600
	Serial.begin(9600);
	// Wait for console opening
	delay(3000);
	// Check if RTC is connected correctly
	if (! rtc.begin()) {
	Serial.println("Couldn't find RTC");
	while (1);
	}
	// Check if the RTC lost power and if so, set the time:
	if (rtc.lostPower()) {
	Serial.println("RTC lost power, lets set the time!");
	// The following line sets the RTC to the date & time this sketch was compiled:
	//rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
	// This line sets the RTC with an explicit date & time, for example to set
	// January 21, 2014 at 3am you would call:
	rtc.adjust(DateTime(2022,4, 20, 9, 57, 0));
	}
	// Setup sensor
	dht.begin();
	// Set the display brightness (0-7):
	display.setBrightness(5);
	// Clear the display:
	display.clear();
	}
	void loop() {
	// Get current date and time
	DateTime now = rtc.now();
	// Create time format to display:
	int displaytime = (now.hour() * 100) + now.minute();
	// Print displaytime to the Serial Monitor
	Serial.println(displaytime);
	// Display the current time in 24 hour format with leading zeros enabled and a center colon:
	display.showNumberDecEx(displaytime, 0b11100000, true);
	// Remove the following lines of code if you want a static instead of a blinking center colon:
	//delay(1000);
	//display.showNumberDec(displaytime, true); // Prints displaytime without center colon.
	delay(5000);
	// Read the temperature as Celsius and Fahrenheit
	temperature_celsius = dht.readTemperature();
	temperature_fahrenheit = dht.readTemperature(true);
	humidity_read = dht.readHumidity();
	display.clear();
	// Display the temperature in celsius format
	display.showNumberDec(temperature_celsius, false, 2, 0);
	display.setSegments(celsius, 2, 2);
	delay(2000);
	display.clear();
	// Display the temperature in fahrenheit format
	display.showNumberDec(temperature_fahrenheit, false, 2, 0);
	display.setSegments(fahrenheit, 2, 2);
	delay(2000);
	display.clear();
	// Display the humidity
	// Display the humidity
	display.showNumberDec(humidity_read, false, 2, 0);
	display.setSegments(humidity, 1, 3);
	delay(2000);
	display.clear();
	}

view raw TM1637 clock and DHT11 hosted with ❤ by GitHub