Example Code for Arduino-Read Temperature and Humidity

Hardware Preparation

• DFRduino UNO R3 (or similar) x 1
• SEN0527 Fermion: AHT20 Temperature and Humidity Sensor x 1
• M-M/F-M/F-F Jumper wires

Software Preparation

• Arduino IDE
• Download and install the DFRobot_AHT20 Library. (About how to install the library?)

Wiring Diagram

UNO Board: 3V3 - connect to - AHT20:VCC
UNO Board: GND - connect to - AHT20:GND
UNO Board: SCL - connect to - AHT20:SCL
UNO Board: SDA - connect to - AHT20:SDA

Other Preparation Work

Sample Code

#include "DFRobot_AHT20.h"

DFRobot_AHT20 aht20;

void setup(){
  Serial.begin(115200);
  uint8_t status;
  while((status = aht20.begin()) != 0){
    Serial.print("AHT20 sensor initialization failed. error status : ");
    Serial.println(status);
    delay(1000);
  }
}

void loop(){
  if(aht20.startMeasurementReady(/* crcEn = */true)){
    Serial.print(aht20.getTemperature_C());
    Serial.print(" C, ");
    // Get temp in Fahrenheit (F)
    Serial.print(aht20.getTemperature_F());
    Serial.print(" F\t");
    Serial.print(aht20.getHumidity_RH());
    Serial.println(" %RH");
    delay(5000);
  }
}

Result

As shown in the figure below, the temperature values in ℃ and ℉, and humidity values are displayed in the serial monitor.