#include "DHT.h"
#define DHTPIN D8 // Pin where the DHT22 is connected
#define DHTTYPE DHT22
#define redPin D2 // D2 pin on for red color
#define greenPin D3 // D3 pin on for green color
#define bluePin D4 // D4 pin on for blue color
DHT dht(DHTPIN, DHTTYPE);
void setup() {
// put your setup code here, to run once:
pinMode(redPin, OUTPUT);
pinMode(greenPin, OUTPUT);
pinMode(bluePin, OUTPUT);
Serial.begin(115200);
dht.begin();
Serial.println("Hello, STM32!");
}
void loop() {
// put your main code here, to run repeatedly:
delay(2000); // Wait a few seconds between measurements.
float temperature = dht.readTemperature();
// Print temperature.
Serial.print("Temperature: ");
Serial.print(temperature);
Serial.println(" °C");
// Change LED color based on temperature ranges
if (temperature < 20) { // If temperature is less than 20°C, make it blue
digitalWrite(redPin, LOW);
digitalWrite(greenPin, LOW);
digitalWrite(bluePin, HIGH);
} else if (temperature >= 20 && temperature <= 30) { // If temperature is between 20°C and 30°C, make it green
digitalWrite(redPin, LOW);
digitalWrite(greenPin, HIGH);
digitalWrite(bluePin, LOW);
} else { // If temperature is greater than 30°C, make it red and activate the buzzer
digitalWrite(redPin, HIGH);
digitalWrite(greenPin, LOW);
digitalWrite(bluePin, LOW);
}
}