Version 1.0.0
Initial version.
This commit is contained in:
commit
ed7f6201c7
1
.gitignore
vendored
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.gitignore
vendored
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.DS_Store
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1
CMakeLists.txt
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1
CMakeLists.txt
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||||
idf_component_register(SRCS "zh_aht.c" INCLUDE_DIRS "include" REQUIRES driver)
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73
LICENSE
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73
LICENSE
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@ -0,0 +1,73 @@
|
||||
Apache License
|
||||
Version 2.0, January 2004
|
||||
http://www.apache.org/licenses/
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||||
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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1. Definitions.
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"License" shall mean the terms and conditions for use, reproduction, and distribution as defined by Sections 1 through 9 of this document.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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Unless required by applicable law or agreed to in writing, software
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limitations under the License.
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76
README.md
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76
README.md
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|
||||
# ESP32 ESP-IDF and ESP8266 RTOS SDK component for AHT20/AHT21 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_aht.git
|
||||
```
|
||||
|
||||
In the application, add the component:
|
||||
|
||||
```c
|
||||
#include "zh_aht.h"
|
||||
```
|
||||
|
||||
## Example
|
||||
|
||||
Reading the sensor:
|
||||
|
||||
```c
|
||||
#include "zh_aht.h"
|
||||
|
||||
#define I2C_PORT (I2C_NUM_MAX - 1)
|
||||
|
||||
void app_main(void)
|
||||
{
|
||||
esp_log_level_set("zh_aht", 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_aht_init_config_t aht_init_config = ZH_AHT_INIT_CONFIG_DEFAULT();
|
||||
#ifdef CONFIG_IDF_TARGET_ESP8266
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||||
aht_init_config.i2c_port = I2C_PORT;
|
||||
#else
|
||||
aht_init_config.i2c_handle = i2c_bus_handle;
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||||
#endif
|
||||
zh_aht_init(&aht_init_config);
|
||||
float humidity = 0.0;
|
||||
float temperature = 0.0;
|
||||
for (;;)
|
||||
{
|
||||
zh_aht_read(&humidity, &temperature);
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||||
printf("Humidity %0.2f\n", humidity);
|
||||
printf("Temperature %0.2f\n", temperature);
|
||||
vTaskDelay(5000 / portTICK_PERIOD_MS);
|
||||
}
|
||||
}
|
||||
```
|
||||
|
||||
Any [feedback](mailto:github@azholtikov.ru) will be gladly accepted.
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0
component.mk
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0
component.mk
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79
include/zh_aht.h
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include/zh_aht.h
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||||
#pragma once
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||||
|
||||
#include "esp_err.h"
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||||
#include "esp_log.h"
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||||
#ifdef CONFIG_IDF_TARGET_ESP8266
|
||||
#include "driver/i2c.h"
|
||||
#else
|
||||
#include "driver/i2c_master.h"
|
||||
#endif
|
||||
#include "freertos/FreeRTOS.h"
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||||
#include "freertos/task.h"
|
||||
|
||||
#define ZH_AHT_INIT_CONFIG_DEFAULT() \
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||||
{ \
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||||
.i2c_port = 0 \
|
||||
}
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C"
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||||
{
|
||||
#endif
|
||||
|
||||
typedef struct // Structure for initial initialization of AHT sensor.
|
||||
{
|
||||
bool i2c_port; // I2C port.
|
||||
#ifndef CONFIG_IDF_TARGET_ESP8266
|
||||
i2c_master_bus_handle_t i2c_handle; // Unique I2C bus handle.
|
||||
#endif
|
||||
|
||||
} zh_aht_init_config_t;
|
||||
|
||||
/**
|
||||
* @brief Initialize AHT sensor.
|
||||
*
|
||||
* @param[in] config Pointer to AHT initialized configuration structure. Can point to a temporary variable.
|
||||
*
|
||||
* @attention I2C driver must be initialized first.
|
||||
*
|
||||
* @note Before initialize the sensor recommend initialize zh_aht_init_config_t structure with default values.
|
||||
*
|
||||
* @code zh_aht_init_config_t config = ZH_AHT_INIT_CONFIG_DEFAULT() @endcode
|
||||
*
|
||||
* @return
|
||||
* - ESP_OK if initialization was success
|
||||
* - ESP_ERR_INVALID_ARG if parameter error
|
||||
* - ESP_ERR_NOT_FOUND if sensor not connected or not responded
|
||||
* - ESP_ERR_INVALID_RESPONSE if I2C driver error
|
||||
*/
|
||||
esp_err_t zh_aht_init(const zh_aht_init_config_t *config);
|
||||
|
||||
/**
|
||||
* @brief Read AHT sensor.
|
||||
*
|
||||
* @param[out] humidity Pointer for AHT sensor reading data of humidity.
|
||||
* @param[out] temperature Pointer for AHT sensor reading data of temperature.
|
||||
*
|
||||
* @return
|
||||
* - ESP_OK if read was success
|
||||
* - ESP_ERR_INVALID_ARG if parameter error
|
||||
* - ESP_ERR_NOT_FOUND if sensor is not initialized
|
||||
* - ESP_ERR_INVALID_CRC if check CRC is fail
|
||||
* - ESP_ERR_INVALID_RESPONSE if I2C driver error
|
||||
* - ESP_ERR_TIMEOUT if sensor has not responded
|
||||
*/
|
||||
esp_err_t zh_aht_read(float *humidity, float *temperature);
|
||||
|
||||
/**
|
||||
* @brief Reset AHT sensor.
|
||||
*
|
||||
* @return
|
||||
* - ESP_OK if reset was success
|
||||
* - ESP_ERR_NOT_FOUND if sensor is not initialized
|
||||
* - ESP_ERR_INVALID_RESPONSE if I2C driver error
|
||||
*/
|
||||
esp_err_t zh_aht_reset(void);
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
1
version.txt
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1
version.txt
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|
||||
1.0.0
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226
zh_aht.c
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226
zh_aht.c
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#include "zh_aht.h"
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||||
|
||||
#define I2C_DATA_SIZE 7 // Sensor data size.
|
||||
#define MEASUREMENT_TIME 80 // Sensor measurement time.
|
||||
#define RESET_TIME 20 // Sensor reset time.
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||||
#define I2C_ADDRESS 0x38 // Sensor I2C address.
|
||||
#define I2C_DATA_READ_COMMAND 0xAC, 0x33, 0x00 // Command for read sensor data (temperature and humidity).
|
||||
#define I2C_RESET_COMMAND 0xBA // Command for reset sensor.
|
||||
#define I2C_INIT_COMMAND 0xBE, 0x08, 0x00 // Command for initialize sensor.
|
||||
#define I2C_STATUS_READ_COMMAND 0x71 // Command for read sensor status.
|
||||
|
||||
static zh_aht_init_config_t _init_config = {0};
|
||||
static bool _is_initialized = false;
|
||||
#ifndef CONFIG_IDF_TARGET_ESP8266
|
||||
static i2c_master_dev_handle_t _aht_handle = {0};
|
||||
#endif
|
||||
|
||||
static const char *TAG = "zh_aht";
|
||||
|
||||
static uint8_t _calc_crc(const uint8_t *buf, size_t len);
|
||||
|
||||
esp_err_t zh_aht_init(const zh_aht_init_config_t *config)
|
||||
{
|
||||
ESP_LOGI(TAG, "AHT initialization begin.");
|
||||
if (config == NULL)
|
||||
{
|
||||
ESP_LOGE(TAG, "AHT initialization fail. Invalid argument.");
|
||||
return ESP_ERR_INVALID_ARG;
|
||||
}
|
||||
_init_config = *config;
|
||||
#ifndef CONFIG_IDF_TARGET_ESP8266
|
||||
i2c_device_config_t aht_config = {
|
||||
.dev_addr_length = I2C_ADDR_BIT_LEN_7,
|
||||
.device_address = I2C_ADDRESS,
|
||||
.scl_speed_hz = 100000,
|
||||
};
|
||||
i2c_master_bus_add_device(_init_config.i2c_handle, &aht_config, &_aht_handle);
|
||||
if (i2c_master_probe(_init_config.i2c_handle, I2C_ADDRESS, 1000 / portTICK_PERIOD_MS) != ESP_OK)
|
||||
{
|
||||
ESP_LOGE(TAG, "AHT initialization fail. Sensor not connected or not responded.");
|
||||
return ESP_ERR_NOT_FOUND;
|
||||
}
|
||||
#endif
|
||||
esp_err_t esp_err = ESP_OK;
|
||||
uint8_t command = I2C_STATUS_READ_COMMAND;
|
||||
uint8_t sensor_data = 0;
|
||||
#ifdef CONFIG_IDF_TARGET_ESP8266
|
||||
i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create();
|
||||
i2c_master_start(i2c_cmd_handle);
|
||||
i2c_master_write_byte(i2c_cmd_handle, I2C_ADDRESS << 1 | I2C_MASTER_WRITE, true);
|
||||
i2c_master_write_byte(i2c_cmd_handle, command, true);
|
||||
i2c_master_stop(i2c_cmd_handle);
|
||||
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
|
||||
i2c_cmd_link_delete(i2c_cmd_handle);
|
||||
#else
|
||||
esp_err = i2c_master_transmit(_aht_handle, &command, sizeof(command), 1000 / portTICK_PERIOD_MS);
|
||||
#endif
|
||||
if (esp_err != ESP_OK)
|
||||
{
|
||||
ESP_LOGE(TAG, "AHT initialization fail. I2C driver error at line %d.", __LINE__);
|
||||
return ESP_ERR_INVALID_RESPONSE;
|
||||
}
|
||||
#ifdef CONFIG_IDF_TARGET_ESP8266
|
||||
i2c_cmd_handle = i2c_cmd_link_create();
|
||||
i2c_master_start(i2c_cmd_handle);
|
||||
i2c_master_write_byte(i2c_cmd_handle, I2C_ADDRESS << 1 | I2C_MASTER_READ, true);
|
||||
i2c_master_read_byte(i2c_cmd_handle, &sensor_data, I2C_MASTER_NACK);
|
||||
i2c_master_stop(i2c_cmd_handle);
|
||||
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
|
||||
i2c_cmd_link_delete(i2c_cmd_handle);
|
||||
#else
|
||||
esp_err = i2c_master_receive(_aht_handle, &sensor_data, sizeof(sensor_data), 1000 / portTICK_PERIOD_MS);
|
||||
#endif
|
||||
if (esp_err != ESP_OK)
|
||||
{
|
||||
ESP_LOGE(TAG, "AHT initialization fail. I2C driver error at line %d.", __LINE__);
|
||||
return ESP_ERR_INVALID_RESPONSE;
|
||||
}
|
||||
if ((sensor_data & 0b00001000) == 0)
|
||||
{
|
||||
uint8_t command[] = {I2C_INIT_COMMAND};
|
||||
#ifdef CONFIG_IDF_TARGET_ESP8266
|
||||
i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create();
|
||||
i2c_master_start(i2c_cmd_handle);
|
||||
i2c_master_write_byte(i2c_cmd_handle, I2C_ADDRESS << 1 | I2C_MASTER_WRITE, true);
|
||||
i2c_master_write_byte(i2c_cmd_handle, command[0], true);
|
||||
i2c_master_write_byte(i2c_cmd_handle, command[1], true);
|
||||
i2c_master_write_byte(i2c_cmd_handle, command[2], true);
|
||||
i2c_master_stop(i2c_cmd_handle);
|
||||
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
|
||||
i2c_cmd_link_delete(i2c_cmd_handle);
|
||||
#else
|
||||
esp_err = i2c_master_transmit(_aht_handle, command, sizeof(command), 1000 / portTICK_PERIOD_MS);
|
||||
#endif
|
||||
if (esp_err != ESP_OK)
|
||||
{
|
||||
ESP_LOGE(TAG, "AHT initialization fail. I2C driver error at line %d.", __LINE__);
|
||||
return ESP_ERR_INVALID_RESPONSE;
|
||||
}
|
||||
}
|
||||
ESP_LOGI(TAG, "AHT initialization success.");
|
||||
_is_initialized = true;
|
||||
return ESP_OK;
|
||||
}
|
||||
|
||||
esp_err_t zh_aht_read(float *humidity, float *temperature)
|
||||
{
|
||||
ESP_LOGI(TAG, "AHT read begin.");
|
||||
if (humidity == NULL || temperature == NULL)
|
||||
{
|
||||
ESP_LOGE(TAG, "AHT read fail. Invalid argument.");
|
||||
return ESP_ERR_INVALID_ARG;
|
||||
}
|
||||
if (_is_initialized == false)
|
||||
{
|
||||
ESP_LOGE(TAG, "AHT read fail. AHT not initialized.");
|
||||
return ESP_ERR_NOT_FOUND;
|
||||
}
|
||||
esp_err_t esp_err = ESP_OK;
|
||||
uint8_t sensor_data[I2C_DATA_SIZE] = {0};
|
||||
uint8_t command[] = {I2C_DATA_READ_COMMAND};
|
||||
#ifdef CONFIG_IDF_TARGET_ESP8266
|
||||
i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create();
|
||||
i2c_master_start(i2c_cmd_handle);
|
||||
i2c_master_write_byte(i2c_cmd_handle, I2C_ADDRESS << 1 | I2C_MASTER_WRITE, true);
|
||||
i2c_master_write_byte(i2c_cmd_handle, command[0], true);
|
||||
i2c_master_write_byte(i2c_cmd_handle, command[1], true);
|
||||
i2c_master_write_byte(i2c_cmd_handle, command[2], true);
|
||||
i2c_master_stop(i2c_cmd_handle);
|
||||
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
|
||||
i2c_cmd_link_delete(i2c_cmd_handle);
|
||||
#else
|
||||
esp_err = i2c_master_transmit(_aht_handle, command, sizeof(command), 1000 / portTICK_PERIOD_MS);
|
||||
#endif
|
||||
if (esp_err != ESP_OK)
|
||||
{
|
||||
ESP_LOGE(TAG, "AHT initialization fail. I2C driver error at line %d.", __LINE__);
|
||||
return ESP_ERR_INVALID_RESPONSE;
|
||||
}
|
||||
vTaskDelay(MEASUREMENT_TIME / portTICK_PERIOD_MS);
|
||||
#ifdef CONFIG_IDF_TARGET_ESP8266
|
||||
i2c_cmd_handle = i2c_cmd_link_create();
|
||||
i2c_master_start(i2c_cmd_handle);
|
||||
i2c_master_write_byte(i2c_cmd_handle, I2C_ADDRESS << 1 | I2C_MASTER_READ, true);
|
||||
for (uint8_t i = 0; i < sizeof(sensor_data); ++i)
|
||||
{
|
||||
i2c_master_read_byte(i2c_cmd_handle, &sensor_data[i], i == (sizeof(sensor_data) - 1) ? I2C_MASTER_NACK : I2C_MASTER_ACK);
|
||||
}
|
||||
i2c_master_stop(i2c_cmd_handle);
|
||||
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
|
||||
i2c_cmd_link_delete(i2c_cmd_handle);
|
||||
#else
|
||||
esp_err = i2c_master_receive(_aht_handle, sensor_data, sizeof(sensor_data), 1000 / portTICK_PERIOD_MS);
|
||||
#endif
|
||||
if (esp_err != ESP_OK)
|
||||
{
|
||||
ESP_LOGE(TAG, "AHT initialization fail. I2C driver error at line %d.", __LINE__);
|
||||
return ESP_ERR_INVALID_RESPONSE;
|
||||
}
|
||||
if ((sensor_data[0] & 0b01000000) != 0)
|
||||
{
|
||||
ESP_LOGE(TAG, "AHT read fail. Timeout exceeded.");
|
||||
return ESP_ERR_TIMEOUT;
|
||||
}
|
||||
if (_calc_crc(sensor_data, I2C_DATA_SIZE - 1) != sensor_data[6])
|
||||
{
|
||||
ESP_LOGE(TAG, "DHT read fail. Invalid CRC.");
|
||||
return ESP_ERR_INVALID_CRC;
|
||||
}
|
||||
*humidity = (((((uint32_t)sensor_data[1]) << 16) | (((uint32_t)sensor_data[2]) << 8) | (((uint32_t)sensor_data[3]) << 0)) >> 4) / 1048576.0 * 100.0;
|
||||
*temperature = (((((uint32_t)sensor_data[3]) << 16) | (((uint32_t)sensor_data[4]) << 8) | (((uint32_t)sensor_data[5]) << 0)) & 0xFFFFF) / 1048576.0 * 200.0 - 50.0;
|
||||
ESP_LOGI(TAG, "AHT read success.");
|
||||
return ESP_OK;
|
||||
}
|
||||
|
||||
esp_err_t zh_aht_reset(void)
|
||||
{
|
||||
ESP_LOGI(TAG, "AHT reset begin.");
|
||||
if (_is_initialized == false)
|
||||
{
|
||||
ESP_LOGE(TAG, "AHT reset fail. AHT not initialized.");
|
||||
return ESP_ERR_NOT_FOUND;
|
||||
}
|
||||
esp_err_t esp_err = ESP_OK;
|
||||
uint8_t command = I2C_RESET_COMMAND;
|
||||
#ifdef CONFIG_IDF_TARGET_ESP8266
|
||||
i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create();
|
||||
i2c_master_start(i2c_cmd_handle);
|
||||
i2c_master_write_byte(i2c_cmd_handle, I2C_ADDRESS << 1 | I2C_MASTER_WRITE, true);
|
||||
i2c_master_write_byte(i2c_cmd_handle, command, true);
|
||||
i2c_master_stop(i2c_cmd_handle);
|
||||
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
|
||||
i2c_cmd_link_delete(i2c_cmd_handle);
|
||||
#else
|
||||
esp_err = i2c_master_transmit(_aht_handle, &command, sizeof(command), 1000 / portTICK_PERIOD_MS);
|
||||
#endif
|
||||
if (esp_err != ESP_OK)
|
||||
{
|
||||
ESP_LOGE(TAG, "AHT initialization fail. I2C driver error at line %d.", __LINE__);
|
||||
return ESP_ERR_INVALID_RESPONSE;
|
||||
}
|
||||
vTaskDelay(RESET_TIME / portTICK_PERIOD_MS);
|
||||
ESP_LOGI(TAG, "AHT reset success.");
|
||||
return ESP_OK;
|
||||
}
|
||||
|
||||
static uint8_t _calc_crc(const uint8_t *buf, size_t len)
|
||||
{
|
||||
uint8_t crc = 0xFF;
|
||||
for (uint8_t byte = 0; byte < len; byte++)
|
||||
{
|
||||
crc ^= buf[byte];
|
||||
for (uint8_t i = 8; i > 0; --i)
|
||||
{
|
||||
if ((crc & 0x80) != 0)
|
||||
{
|
||||
crc = (crc << 1) ^ 0x31;
|
||||
}
|
||||
else
|
||||
{
|
||||
crc = crc << 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
return crc;
|
||||
}
|
Loading…
x
Reference in New Issue
Block a user