https://github.com/azholtikov/zh_dht

ESP32 ESP-IDF and ESP8266 RTOS SDK component for DHT11/DHT22/AM2302/AM2320 humidity & temperature sensor.
https://github.com/azholtikov/zh_dht

am2302 am2320 component dht11 dht22 esp-idf esp32 esp8266 i2c rtos-sdk

Last synced: about 1 month ago
JSON representation

ESP32 ESP-IDF and ESP8266 RTOS SDK component for DHT11/DHT22/AM2302/AM2320 humidity & temperature sensor.

• Host: GitHub
• URL: https://github.com/azholtikov/zh_dht
• Owner: aZholtikov
• License: apache-2.0
• Created: 2024-03-08T07:12:57.000Z (10 months ago)
• Default Branch: main
• Last Pushed: 2024-06-23T08:22:54.000Z (6 months ago)
• Last Synced: 2024-06-23T23:14:38.895Z (6 months ago)
• Topics: am2302, am2320, component, dht11, dht22, esp-idf, esp32, esp8266, i2c, rtos-sdk
• Language: C
• Homepage:
• Size: 10.7 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# ESP32 ESP-IDF and ESP8266 RTOS SDK component for DHT11/DHT22/AM2302/AM2320 humidity & temperature sensor

## Tested on

1. ESP8266 RTOS_SDK v3.4

2. ESP32 ESP-IDF v5.2

## Using

In an existing project, run the following command to install the component:

```text

cd ../your_project/components

git clone https://github.com/aZholtikov/zh_dht.git

```

In the application, add the component:

```c

#include "zh_dht.h"

```

## Example

Reading the sensor with 1-wire connection (DHT11, DHT22, AM2302, AM2320):

```c

#include "zh_dht.h"

void app_main(void)

{

    esp_log_level_set("zh_dht", ESP_LOG_NONE);

    zh_dht_init_config_t dht_init_config = ZH_DHT_INIT_CONFIG_DEFAULT();

    dht_init_config.sensor_pin = GPIO_NUM_5;

    zh_dht_init(&dht_init_config);

    float humidity = 0.0;

    float temperature = 0.0;

    for (;;)

    {

        zh_dht_read(&humidity, &temperature);

        printf("Humidity %0.2f\n", humidity);

        printf("Temperature %0.2f\n", temperature);

        vTaskDelay(5000 / portTICK_PERIOD_MS);

    }

}

```

Reading the sensor with I2C connection (AM2320 only):

```c

#include "zh_dht.h"

#define I2C_PORT (I2C_NUM_MAX - 1)

void app_main(void)

{

    esp_log_level_set("zh_dht", ESP_LOG_NONE);

 #ifdef CONFIG_IDF_TARGET_ESP8266

    i2c_config_t i2c_config = {

        .mode = I2C_MODE_MASTER,

        .sda_io_num = GPIO_NUM_4, // In accordance with used chip.

        .sda_pullup_en = GPIO_PULLUP_ENABLE,

        .scl_io_num = GPIO_NUM_5, // In accordance with used chip.

        .scl_pullup_en = GPIO_PULLUP_ENABLE,

    };

    i2c_driver_install(I2C_PORT, i2c_config.mode);

    i2c_param_config(I2C_PORT, &i2c_config);

#else

    i2c_master_bus_config_t i2c_bus_config = {

        .clk_source = I2C_CLK_SRC_DEFAULT,

        .i2c_port = I2C_PORT,

        .scl_io_num = GPIO_NUM_22, // In accordance with used chip.

        .sda_io_num = GPIO_NUM_21, // In accordance with used chip.

        .glitch_ignore_cnt = 7,

        .flags.enable_internal_pullup = true,

    };

    i2c_master_bus_handle_t i2c_bus_handle;

    i2c_new_master_bus(&i2c_bus_config, &i2c_bus_handle);

#endif

    zh_dht_init_config_t dht_init_config = ZH_DHT_INIT_CONFIG_DEFAULT();

#ifdef CONFIG_IDF_TARGET_ESP8266

    dht_init_config.i2c_port = I2C_PORT;

#else

    dht_init_config.i2c_handle = i2c_bus_handle;

#endif

    zh_dht_init(&dht_init_config);

    float humidity = 0.0;

    float temperature = 0.0;

    for (;;)

    {

        zh_dht_read(&humidity, &temperature);

        printf("Humidity %0.2f\n", humidity);

        printf("Temperature %0.2f\n", temperature);

        vTaskDelay(5000 / portTICK_PERIOD_MS);

    }

}

```

Any [feedback](mailto:[email protected]) will be gladly accepted.