Example Code for Arduino-Read Temperature & Humidity

Hardware Preparation

• DFRduino UNO R3 (or similar) x 1
• Gravity: Analog SHT30 Temperature & Humidity Sensor x 1
• Gravity 3P sensor wire (or Dupont wires) x 1

Software Preparation

• Arduino IDE

Wiring Diagram

Sample Code

/**************************************************************************/
/*
    @file       SHT30_TempRH_Read.ino
    @author     Henry (DFRobot)
    @version    V1.0
    @date       2019-08-12
    @copyright  Copyright (c) 2010 DFRobot Co.Ltd (https://www.dfrobot.com)
    @licence    The MIT License (MIT)
    @breif      This example read and print the temperature and relative humidity.

    This demo and related libraries are for DFRobot Gravity: Analog SHT30 Temperature & Humidity Sensor
    Check out the links below for tutorials and connection diagrams
    Product(CH): https://www.dfrobot.com.cn/
    Product(EN): https://www.dfrobot.com/

*/
/**************************************************************************/

// VREF: Analog reference
// For Arduino UNO, Leonardo and mega2560, etc. change VREF to 5
// For Arduino Zero, Due, MKR Family, ESP32, etc. 3V3 controllers, change VREF to 3.3
#define VREF 5.0
#define TEMPERATURE_PIN A1
#define HUMIDITY_PIN A0
#define ADC_RESOLUTION 1024

float Tc, Tf, RH, analogVolt;

void setup() {
  Serial.begin(115200);
  Serial.println("SHT30 Starts up.");
}

void loop() {
  
  analogVolt = (float)analogRead(TEMPERATURE_PIN) / ADC_RESOLUTION * VREF;
  // Convert voltage to temperature (℃, centigrade)
  Tc = -66.875 + 72.917 * analogVolt;
  // Convert voltage to temperature (°F, fahrenheit )
  Tf = -88.375 + 131.25 * analogVolt;
  Serial.print("Termperature:" );
  Serial.print(Tc, 1);
  Serial.print(" C / " );
  Serial.print(Tf, 1);
  Serial.println(" F" );

  analogVolt = (float)analogRead(HUMIDITY_PIN) / ADC_RESOLUTION * VREF;
  // Convert voltage to relative humidity (%)
  RH = -12.5 + 41.667 * analogVolt;

  Serial.print("Humidity:" );
  Serial.print(RH, 1);
  Serial.println(" %RH" );

  Serial.println();
  delay(2000);
}

Result

• Temperature or relative humidity is printed every 2s.