Introduction

The GY-213V HDC1080 is a high-precision digital humidity and temperature sensor with I2C interface. This low-power sensor provides ±2% relative humidity accuracy and ±0.2°C temperature accuracy, making it ideal for weather stations, HVAC systems, and IoT applications.

Key Features

Technical Specifications

Pin Configuration

Wiring Diagram (Arduino Uno)

// Basic Connections:
// VCC → 3.3V or 5V
// GND → GND
// SCL → A5 (or SCL)
// SDA → A4 (or SDA)
// ADDR → GND (for default address 0x40)

Basic Reading Example

#include <Wire.h>
#include "ClosedCube_HDC1080.h"

ClosedCube_HDC1080 hdc1080;

void setup() {
  Serial.begin(9600);
  hdc1080.begin(0x40); // Default I2C address
  
  Serial.println("HDC1080 initialized");
  Serial.print("Manufacturer ID=0x");
  Serial.println(hdc1080.readManufacturerId(), HEX);
}

void loop() {
  float humidity = hdc1080.readHumidity();
  float temperature = hdc1080.readTemperature();
  
  Serial.print("Humidity: ");
  Serial.print(humidity);
  Serial.print("% RH, Temperature: ");
  Serial.print(temperature);
  Serial.println("°C");
  
  delay(2000);
}

Advanced Configuration

// Set measurement resolution
hdc1080.setResolution(HDC1080_RESOLUTION_14BIT, 
                     HDC1080_RESOLUTION_14BIT);

// Enable built-in heater (for drying condensation)
hdc1080.heatOn();
delay(1000);
hdc1080.heatOff();

// Check battery status (below 2.8V)
if(hdc1080.readBatteryStatus() == LOW) {
  Serial.println("Low battery!");
}

// Connect ADDR pin to VCC to use 0x41
hdc1080.begin(0x41); // Alternate address

Troubleshooting