Measured temperature is about 7-8 degrees(in Celsius) less than the real temperature

[abattya]

Hello, the code works for me, but i measure around 24-25 Celsius, but there is only 18 degress here. I use 3.3V supply(but i also tried with 5V) and a 10k resistor between data and VCC. What can I do?

• board: ESP32 DEVKIT C

• Arduino IDE version (found in Arduino -> About Arduino menu): 1.8.19

CODE:

#include <DHT.h> #define DHTPIN 4 #define DHTTYPE DHT22 DHT dht(DHTPIN, DHTTYPE);

float h = 0; float t = 0;

void setup() { Serial.begin(9600); dht.begin();

}

void loop() {

if (isnan(h)) { Serial.println("Failed to read Humidity from DHT sensor!"); return; }

if (isnan(t)) { Serial.println("Failed to read celsius from DHT sensor!"); return;

} h= dht.readHumidity(); t= dht.readTemperature();

Serial.print(F("Humidity: ")); Serial.print(h); Serial.print("°% "); Serial.print(F("Temperature: ")); Serial.print(t); Serial.println("°C ");

delay(3000); }

[caternuson]

What is measuring 18 degrees? How close together is that device and the DHT22?