ESP32 HDC1080 / GY-213V-HDC1080 Temperature and Humidity Sensor

Code Examples

Below you can find code examples of HDC1080 / GY-213V-HDC1080 Temperature and Humidity Sensor with ESP32 in several frameworks:

• Arduino IDE
• ESP-IDF
• ESPHome
• PlatformIO
• MicroPython

ESP32 HDC1080 / GY-213V-HDC1080 Arduino IDE Code Example

Example in Arduino IDE

Fill in your main Arduino IDE sketch file with the following code to use the HDC1080 / GY-213V-HDC1080 Temperature and Humidity Sensor:

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

ClosedCube_HDC1080 hdc1080;

void setup() {
  Wire.begin();
  Serial.begin(9600);
  hdc1080.begin(0x40);
}

void loop() {
  float temperature = hdc1080.readTemperature();
  float humidity = hdc1080.readHumidity();
  Serial.print("Temperature: ");
  Serial.print(temperature, 2);
  Serial.println(" °C");
  Serial.print("Humidity: ");
  Serial.print(humidity, 2);
  Serial.println(" %");
  delay(2000);
}

This Arduino sketch demonstrates how to interface with the HDC1080 sensor using the ClosedCube_HDC1080 library. It initializes the sensor and reads temperature and humidity data every 2 seconds, printing the results to the Serial Monitor. Ensure that the ClosedCube_HDC1080 library is installed in your Arduino IDE.

Connect your ESP32 to your computer via a USB cable, Ensure the correct Board and Port are selected under Tools, Click the "Upload" button in the Arduino IDE to compile and upload the code to your ESP32.

ESP32 HDC1080 / GY-213V-HDC1080 ESP-IDF Code Example

Example in Espressif IoT Framework (ESP-IDF)

If you're using ESP-IDF to work with the HDC1080 / GY-213V-HDC1080 Temperature and Humidity Sensor, here's how you can set it up and read data from the sensor. Fill in this code in the main ESP-IDF file:

#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/i2c.h"

#define I2C_MASTER_SCL_IO    22    /*!< GPIO number used for I2C master clock */
#define I2C_MASTER_SDA_IO    21    /*!< GPIO number used for I2C master data */
#define I2C_MASTER_NUM       I2C_NUM_0 /*!< I2C master I2C port number */
#define I2C_MASTER_FREQ_HZ   100000     /*!< I2C master clock frequency */
#define HDC1080_SENSOR_ADDR  0x40       /*!< HDC1080 I2C address */

static esp_err_t i2c_master_init(void) {
    i2c_config_t conf = {
        .mode = I2C_MODE_MASTER,
        .sda_io_num = I2C_MASTER_SDA_IO,
        .scl_io_num = I2C_MASTER_SCL_IO,
        .sda_pullup_en = GPIO_PULLUP_ENABLE,
        .scl_pullup_en = GPIO_PULLUP_ENABLE,
        .master.clk_speed = I2C_MASTER_FREQ_HZ,
    };
    esp_err_t err = i2c_param_config(I2C_MASTER_NUM, &conf);
    if (err != ESP_OK) {
        return err;
    }
    return i2c_driver_install(I2C_MASTER_NUM, conf.mode, 0, 0, 0);
}

void read_hdc1080_sensor() {
    uint8_t data[4];

    // Send command to measure temperature and humidity
    uint8_t cmd = 0x00; // Temperature measurement command
    i2c_master_write_to_device(I2C_MASTER_NUM, HDC1080_SENSOR_ADDR, &cmd, 1, pdMS_TO_TICKS(1000));
    vTaskDelay(pdMS_TO_TICKS(15)); // Delay for measurement to complete

    // Read 4 bytes of data: temperature (2 bytes) + humidity (2 bytes)
    i2c_master_read_from_device(I2C_MASTER_NUM, HDC1080_SENSOR_ADDR, data, 4, pdMS_TO_TICKS(1000));

    // Convert temperature and humidity values
    uint16_t raw_temp = (data[0] << 8) | data[1];
    uint16_t raw_humidity = (data[2] << 8) | data[3];

    float temperature = (raw_temp / 65536.0) * 165.0 - 40.0;
    float humidity = (raw_humidity / 65536.0) * 100.0;

    printf("Temperature: %.2f °C, Humidity: %.2f %%\n", temperature, humidity);
}

void app_main() {
    ESP_ERROR_CHECK(i2c_master_init());

    while (1) {
        read_hdc1080_sensor();
        vTaskDelay(pdMS_TO_TICKS(2000));
    }
}

This ESP-IDF code demonstrates how to interface with the HDC1080 sensor using the I2C protocol. It initializes the I2C master, sends a command to the sensor to measure temperature and humidity, reads the raw data, converts it to human-readable values, and prints the results to the console every 2 seconds.

Update the I2C pins (I2C_MASTER_SDA_IO and I2C_MASTER_SCL_IO) to match your ESP32 hardware setup, Use idf.py build to compile the project, Use idf.py flash to upload the code to your ESP32.

ESP32 HDC1080 / GY-213V-HDC1080 ESPHome Code Example

Example in ESPHome (Home Assistant)

Fill in this configuration in your ESPHome YAML configuration file (example.yml) to integrate the HDC1080 / GY-213V-HDC1080 Temperature and Humidity Sensor

sensor:
  - platform: hdc1080
    temperature:
      name: "Living Room Temperature"
    humidity:
      name: "Living Room Humidity"
    update_interval: 60s

This ESPHome configuration defines the HDC1080 sensor. Two sensor entities are created: one for temperature and one for humidity, with user-friendly names such as 'Living Room Temperature' and 'Living Room Humidity.' The `update_interval` is set to 60 seconds, ensuring that the sensor data is updated once per minute.

Upload this code to your ESP32 using the ESPHome dashboard or the esphome run command.

ESP32 HDC1080 / GY-213V-HDC1080 PlatformIO Code Example

Example in PlatformIO Framework

For PlatformIO, make sure to configure the platformio.ini file with the appropriate environment and libraries, and then proceed with the code.

Configure platformio.ini

First, your platformio.ini should look like below. You might need to include some libraries as shown. Make sure to change the board to your ESP32:

[env:esp32dev]
platform = espressif32
board = esp32dev
framework = arduino
lib_deps = 
    closedcube/ClosedCube HDC1080 @ ^1.1.0
monitor_speed = 115200

ESP32 HDC1080 / GY-213V-HDC1080 PlatformIO Example Code

Write this code in your PlatformIO project under the src/main.cpp file to use the HDC1080 / GY-213V-HDC1080 Temperature and Humidity Sensor:

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

ClosedCube_HDC1080 hdc1080;

void setup() {
    Wire.begin();
    Serial.begin(115200);
    hdc1080.begin(0x40);
    Serial.println("HDC1080 initialized.");
}

void loop() {
    float temperature = hdc1080.readTemperature();
    float humidity = hdc1080.readHumidity();

    Serial.print("Temperature: ");
    Serial.print(temperature, 2);
    Serial.println(" °C");
    Serial.print("Humidity: ");
    Serial.print(humidity, 2);
    Serial.println(" %");

    delay(2000);
}

This PlatformIO code demonstrates how to use the `ClosedCube_HDC1080` library to interface with the HDC1080 sensor. It initializes the sensor and reads temperature and humidity data every 2 seconds, printing the results to the Serial Monitor.

Upload the code to your ESP32 using the PlatformIO "Upload" button in your IDE or the pio run --target upload command.

ESP32 HDC1080 / GY-213V-HDC1080 MicroPython Code Example

Example in Micro Python Framework

Fill in this script in your MicroPython main.py file (main.py) to integrate the HDC1080 / GY-213V-HDC1080 Temperature and Humidity Sensor with your ESP32.

from machine import I2C, Pin
from time import sleep

# Initialize I2C
i2c = I2C(0, scl=Pin(22), sda=Pin(21))

# HDC1080 I2C address
HDC1080_ADDR = 0x40

# Function to read temperature and humidity
def read_hdc1080():
    i2c.writeto(HDC1080_ADDR, b'\x00')  # Command to start measurement
    sleep(0.015)  # Wait for measurement to complete
    data = i2c.readfrom(HDC1080_ADDR, 4)  # Read 4 bytes of data

    # Convert temperature and humidity data
    raw_temp = (data[0] << 8) | data[1]
    raw_humidity = (data[2] << 8) | data[3]

    temperature = (raw_temp / 65536.0) * 165.0 - 40.0
    humidity = (raw_humidity / 65536.0) * 100.0

    return temperature, humidity

while True:
    temp, hum = read_hdc1080()
    print("Temperature: {:.2f} °C".format(temp))
    print("Humidity: {:.2f} %".format(hum))
    sleep(2)

This MicroPython script interfaces with the HDC1080 sensor using the I2C protocol. It sends a command to the sensor to trigger temperature and humidity measurements, reads the raw data, converts it into human-readable values, and prints the results to the console every 2 seconds.

Upload this code to your ESP32 using a MicroPython-compatible IDE, such as Thonny, uPyCraft, or tools like ampy.