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7ed4ba3a0d | |||
23cac1f945 | |||
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6961da0aa1 | |||
f77318150c |
43
README.md
43
README.md
@ -5,6 +5,11 @@
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1. ESP8266 RTOS_SDK v3.4
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2. ESP32 ESP-IDF v5.2
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## Features
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1. Recorded illuminance values from 0.11 to 121241 lux (depends on operation mode and sensitivity).
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2. Support automatically sensitivity adjustment.
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## Using
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In an existing project, run the following command to install the component:
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@ -32,33 +37,43 @@ Reading the sensor:
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void app_main(void)
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{
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esp_log_level_set("zh_bh1750", ESP_LOG_NONE);
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#ifdef CONFIG_IDF_TARGET_ESP8266
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i2c_config_t i2c_config = {
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.mode = I2C_MODE_MASTER,
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.sda_io_num = GPIO_NUM_21, // In accordance with used chip.
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.sda_io_num = GPIO_NUM_4, // In accordance with used chip.
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.sda_pullup_en = GPIO_PULLUP_ENABLE,
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.scl_io_num = GPIO_NUM_22, // In accordance with used chip.
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.scl_io_num = GPIO_NUM_5, // In accordance with used chip.
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.scl_pullup_en = GPIO_PULLUP_ENABLE,
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#ifndef CONFIG_IDF_TARGET_ESP8266
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.master.clk_speed = 100000,
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#endif
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};
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#ifdef CONFIG_IDF_TARGET_ESP8266
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i2c_param_config(I2C_PORT, &i2c_config);
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i2c_driver_install(I2C_PORT, i2c_config.mode);
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#else
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i2c_param_config(I2C_PORT, &i2c_config);
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i2c_driver_install(I2C_PORT, i2c_config.mode, 0, 0, 0);
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#else
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i2c_master_bus_config_t i2c_bus_config = {
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.clk_source = I2C_CLK_SRC_DEFAULT,
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.i2c_port = I2C_PORT,
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.scl_io_num = GPIO_NUM_22, // In accordance with used chip.
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.sda_io_num = GPIO_NUM_21, // In accordance with used chip.
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.glitch_ignore_cnt = 7,
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.flags.enable_internal_pullup = true,
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};
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i2c_master_bus_handle_t i2c_bus_handle;
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i2c_new_master_bus(&i2c_bus_config, &i2c_bus_handle);
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#endif
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zh_bh1750_init_config_t zh_bh1750_init_config = ZH_BH1750_INIT_CONFIG_DEFAULT();
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zh_bh1750_init_config.i2c_port = I2C_PORT;
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zh_bh1750_init(&zh_bh1750_init_config);
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zh_bh1750_adjust(69); // Just for an example of how to change the sensor sensitivity.
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zh_bh1750_init_config_t bh1750_init_config = ZH_BH1750_INIT_CONFIG_DEFAULT();
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bh1750_init_config.auto_adjust = true; // Just for an example of how to enable auto adjustment the sensor sensitivity.
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#ifdef CONFIG_IDF_TARGET_ESP8266
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bh1750_init_config.i2c_port = I2C_PORT;
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#else
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bh1750_init_config.i2c_handle = i2c_bus_handle;
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#endif
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zh_bh1750_init(&bh1750_init_config);
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zh_bh1750_adjust(69); // Just for an example of how to change the sensor sensitivity. Don’t work if auto adjustment is enabled.
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float lux = 0.0;
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for (;;)
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{
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zh_bh1750_read(&lux);
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printf("Lux %0.2f\n", lux);
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vTaskDelay(1000 / portTICK_PERIOD_MS);
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vTaskDelay(5000 / portTICK_PERIOD_MS);
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}
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}
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```
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BIN
ds/BH1750.pdf
Executable file
BIN
ds/BH1750.pdf
Executable file
Binary file not shown.
@ -2,22 +2,21 @@
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#include "esp_err.h"
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#include "esp_log.h"
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#include "driver/i2c.h"
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#ifdef CONFIG_IDF_TARGET_ESP8266
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#include "driver/i2c.h"
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#else
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#include "driver/i2c_master.h"
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#endif
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#endif
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/**
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* @brief Default values for zh_bh1750_init_config_t structure for initial initialization of the sensor.
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*
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*/
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#define ZH_BH1750_INIT_CONFIG_DEFAULT() \
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{ \
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.i2c_address = I2C_ADDRESS_LOW, \
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.operation_mode = HIGH_RESOLUTION, \
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.work_mode = ONE_TIME, \
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.i2c_port = 0 \
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.i2c_port = 0, \
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.auto_adjust = false \
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}
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#ifdef __cplusplus
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@ -25,16 +24,9 @@ extern "C"
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{
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#endif
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/**
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* @brief Structure for initial initialization of the sensor.
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*
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* @note Before initialize the sensor recommend initialize zh_bh1750_init_config_t structure with default values.
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*
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* @code zh_bh1750_init_config_t config = ZH_BH1750_INIT_CONFIG_DEFAULT() @endcode
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*/
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typedef struct
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typedef struct // Structure for initial initialization of BH1750 sensor.
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{
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enum // Sensor address.
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enum // Sensor I2C address.
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{
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I2C_ADDRESS_HIGH = 0x5C, // Data pin is connected to VCC.
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I2C_ADDRESS_LOW = 0x23 // Data pin is not connected / connected to GND.
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@ -50,7 +42,12 @@ extern "C"
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CONTINUOUSLY, // Continuously measurement.
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ONE_TIME // One time measurement. Sensor is power down after measurement.
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} work_mode;
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bool i2c_port; // I2C port.
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bool i2c_port; // I2C port.
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bool auto_adjust; // Flag of automatic sensitivity adjustment.
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#ifndef CONFIG_IDF_TARGET_ESP8266
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i2c_master_bus_handle_t i2c_handle; // Unique I2C bus handle.
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#endif
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} zh_bh1750_init_config_t;
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/**
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@ -67,8 +64,9 @@ extern "C"
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* @return
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* - ESP_OK if initialization was success
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* - ESP_ERR_INVALID_ARG if parameter error
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* - ESP_ERR_NOT_FOUND if sensor not connected or not responded
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*/
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esp_err_t zh_bh1750_init(zh_bh1750_init_config_t *config);
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esp_err_t zh_bh1750_init(const zh_bh1750_init_config_t *config);
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/**
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* @brief Read BH1750 sensor.
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@ -78,15 +76,15 @@ extern "C"
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* @return
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* - ESP_OK if read was success
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* - ESP_ERR_INVALID_ARG if parameter error
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* - ESP_ERR_NOT_FOUND if BH1750 is not initialized
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* - ESP_FAIL if sending command error or slave has not ACK the transfer
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* - ESP_ERR_INVALID_STATE if I2C driver not installed or not in master mode
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* - ESP_ERR_TIMEOUT if operation timeout because the bus is busy
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* - ESP_ERR_NOT_FOUND if sensor is not initialized
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* - ESP_ERR_INVALID_RESPONSE if I2C driver error
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*/
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esp_err_t zh_bh1750_read(float *data);
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/**
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* @brief Adjust BH1750 sensor sensitivity.
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*
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* @attention Can only be used if the automatic adjustment is not switched on.
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*
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* @param[in] value Value of sensitivity.
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*
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@ -95,12 +93,10 @@ extern "C"
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* @return
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* - ESP_OK if adjust was success
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* - ESP_ERR_INVALID_ARG if parameter error
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* - ESP_ERR_NOT_FOUND if BH1750 is not initialized
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* - ESP_FAIL if sending command error or slave has not ACK the transfer
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* - ESP_ERR_INVALID_STATE if I2C driver not installed or not in master mode
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* - ESP_ERR_TIMEOUT if operation timeout because the bus is busy
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* - ESP_ERR_NOT_FOUND if sensor is not initialized or auto adjust is enabled
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* - ESP_ERR_INVALID_RESPONSE if I2C driver error
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*/
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esp_err_t zh_bh1750_adjust(uint8_t value);
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esp_err_t zh_bh1750_adjust(const uint8_t value);
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#ifdef __cplusplus
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}
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@ -1 +1 @@
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1.0.0
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1.0.5
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126
zh_bh1750.c
126
zh_bh1750.c
@ -1,7 +1,7 @@
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#include "zh_bh1750.h"
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#define LOW_RESOLUTION_MEASUREMENT_TIME 24 // L-Resolution mode measurement time max value.
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#define HIGH_RESOLUTION_MEASUREMENT_TIME 180 // H-Resolution mode measurement time max value.
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#define LOW_RESOLUTION_MEASUREMENT_TIME 24 // L-Resolution mode measurement time.
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#define HIGH_RESOLUTION_MEASUREMENT_TIME 180 // H-Resolution mode measurement time.
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#define SENSITIVITY_DEFAULT 69
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@ -21,10 +21,15 @@ static bool _is_first_start = false;
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static uint8_t _time = 0;
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static uint8_t _sensivity = SENSITIVITY_DEFAULT;
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static bool _is_initialized = false;
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#ifndef CONFIG_IDF_TARGET_ESP8266
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static i2c_master_dev_handle_t _bh1750_handle = {0};
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#endif
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esp_err_t _adjust(const uint8_t value);
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static const char *TAG = "zh_bh1750";
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esp_err_t zh_bh1750_init(zh_bh1750_init_config_t *config)
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esp_err_t zh_bh1750_init(const zh_bh1750_init_config_t *config)
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{
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ESP_LOGI(TAG, "BH1750 initialization begin.");
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if (config == NULL)
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@ -33,6 +38,19 @@ esp_err_t zh_bh1750_init(zh_bh1750_init_config_t *config)
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return ESP_ERR_INVALID_ARG;
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}
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_init_config = *config;
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#ifndef CONFIG_IDF_TARGET_ESP8266
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i2c_device_config_t bh1750_config = {
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.dev_addr_length = I2C_ADDR_BIT_LEN_7,
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.device_address = _init_config.i2c_address,
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.scl_speed_hz = 100000,
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};
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i2c_master_bus_add_device(_init_config.i2c_handle, &bh1750_config, &_bh1750_handle);
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if (i2c_master_probe(_init_config.i2c_handle, _init_config.i2c_address, 1000 / portTICK_PERIOD_MS) != ESP_OK)
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{
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ESP_LOGE(TAG, "BH1750 initialization fail. Sensor not connected or not responded.");
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return ESP_ERR_NOT_FOUND;
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}
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#endif
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switch (_init_config.operation_mode)
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{
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case LOW_RESOLUTION:;
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@ -68,9 +86,9 @@ esp_err_t zh_bh1750_read(float *data)
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ESP_LOGE(TAG, "BH1750 read fail. BH1750 not initialized.");
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return ESP_ERR_NOT_FOUND;
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}
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esp_err_t esp_err = ESP_OK;
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uint8_t sensor_data_high = 0;
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uint8_t sensor_data_low = 0;
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REPEATE:;
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esp_err_t err = ESP_OK;
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uint8_t sensor_data[2] = {0};
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if (_init_config.work_mode == CONTINUOUSLY)
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{
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if (_is_first_start == true)
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@ -82,46 +100,86 @@ esp_err_t zh_bh1750_read(float *data)
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_is_first_start = true;
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}
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}
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#ifdef CONFIG_IDF_TARGET_ESP8266
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i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create();
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i2c_master_start(i2c_cmd_handle);
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i2c_master_write_byte(i2c_cmd_handle, _init_config.i2c_address << 1 | I2C_MASTER_WRITE, true);
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i2c_master_write_byte(i2c_cmd_handle, _command, true);
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i2c_master_stop(i2c_cmd_handle);
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esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
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err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
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i2c_cmd_link_delete(i2c_cmd_handle);
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if (esp_err != ESP_OK)
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#else
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err = i2c_master_transmit(_bh1750_handle, &_command, sizeof(_command), 1000 / portTICK_PERIOD_MS);
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#endif
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if (err != ESP_OK)
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{
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ESP_LOGE(TAG, "BH1750 read fail. I2C driver error.");
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return esp_err;
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ESP_LOGE(TAG, "BH1750 read fail. I2C driver error at line %d.", __LINE__);
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return ESP_ERR_INVALID_RESPONSE;
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}
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vTaskDelay(((_sensivity / SENSITIVITY_DEFAULT) * _time) / portTICK_PERIOD_MS);
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vTaskDelay(_time / portTICK_PERIOD_MS);
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READ:
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#ifdef CONFIG_IDF_TARGET_ESP8266
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i2c_cmd_handle = i2c_cmd_link_create();
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i2c_master_start(i2c_cmd_handle);
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i2c_master_write_byte(i2c_cmd_handle, _init_config.i2c_address << 1 | I2C_MASTER_READ, true);
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i2c_master_read_byte(i2c_cmd_handle, &sensor_data_high, I2C_MASTER_ACK);
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i2c_master_read_byte(i2c_cmd_handle, &sensor_data_low, I2C_MASTER_NACK);
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i2c_master_read_byte(i2c_cmd_handle, &sensor_data[0], I2C_MASTER_ACK);
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i2c_master_read_byte(i2c_cmd_handle, &sensor_data[1], I2C_MASTER_NACK);
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i2c_master_stop(i2c_cmd_handle);
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esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
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err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
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i2c_cmd_link_delete(i2c_cmd_handle);
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if (esp_err != ESP_OK)
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#else
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err = i2c_master_receive(_bh1750_handle, sensor_data, sizeof(sensor_data), 1000 / portTICK_PERIOD_MS);
|
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#endif
|
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if (err != ESP_OK)
|
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{
|
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ESP_LOGE(TAG, "BH1750 read fail. I2C driver error.");
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return esp_err;
|
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ESP_LOGE(TAG, "BH1750 read fail. I2C driver error at line %d.", __LINE__);
|
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return ESP_ERR_INVALID_RESPONSE;
|
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}
|
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uint32_t raw_data = sensor_data[0] << 8 | sensor_data[1];
|
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if (raw_data == 65535 || raw_data == 0)
|
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{
|
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ESP_LOGW(TAG, "BH1750 read error. Sensitivity adjustment required. Current sensivity level %d.", _sensivity);
|
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}
|
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if (_init_config.auto_adjust == true)
|
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{
|
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if (raw_data == 65535 && _sensivity > 31)
|
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{
|
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if (_adjust(_sensivity - 1) == ESP_OK)
|
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{
|
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goto REPEATE;
|
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}
|
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}
|
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if (raw_data == 0 && _sensivity < 254)
|
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{
|
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if (_adjust(_sensivity + 1) == ESP_OK)
|
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{
|
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goto REPEATE;
|
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}
|
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}
|
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}
|
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if (_init_config.operation_mode == HIGH_RESOLUTION_2)
|
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{
|
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*data = (sensor_data_high << 8 | sensor_data_low) * (1 / 1.2 * (69.0 / _sensivity) / 2);
|
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*data = raw_data * (1 / 1.2 * ((float)SENSITIVITY_DEFAULT / _sensivity) / 2);
|
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}
|
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else
|
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{
|
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*data = (sensor_data_high << 8 | sensor_data_low) * (1 / 1.2 * (69.0 / _sensivity));
|
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*data = raw_data * (1 / 1.2 * ((float)SENSITIVITY_DEFAULT / _sensivity));
|
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}
|
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ESP_LOGI(TAG, "BH1750 read success.");
|
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return ESP_OK;
|
||||
}
|
||||
|
||||
esp_err_t zh_bh1750_adjust(uint8_t value)
|
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esp_err_t zh_bh1750_adjust(const uint8_t value)
|
||||
{
|
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if (_init_config.auto_adjust == true)
|
||||
{
|
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ESP_LOGE(TAG, "BH1750 adjust fail. Auto adjust is enabled.");
|
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return ESP_ERR_NOT_FOUND;
|
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}
|
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return _adjust(value);
|
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}
|
||||
|
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esp_err_t _adjust(const uint8_t value)
|
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{
|
||||
ESP_LOGI(TAG, "BH1750 adjust begin.");
|
||||
if ((value < 31 || value > 254))
|
||||
@ -134,36 +192,42 @@ esp_err_t zh_bh1750_adjust(uint8_t value)
|
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ESP_LOGE(TAG, "BH1750 read fail. BH1750 not initialized.");
|
||||
return ESP_ERR_NOT_FOUND;
|
||||
}
|
||||
esp_err_t esp_err = ESP_OK;
|
||||
_sensivity = value;
|
||||
esp_err_t err = ESP_OK;
|
||||
uint8_t sensitivity_data[2] = {value >> 5 | MEASUREMENT_TIME_HIGH_BIT, (value & 0b00011111) | MEASUREMENT_TIME_LOW_BIT};
|
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#ifdef CONFIG_IDF_TARGET_ESP8266
|
||||
i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create();
|
||||
i2c_master_start(i2c_cmd_handle);
|
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i2c_master_write_byte(i2c_cmd_handle, _init_config.i2c_address << 1 | I2C_MASTER_WRITE, true);
|
||||
i2c_master_write_byte(i2c_cmd_handle, value >> 5 | MEASUREMENT_TIME_HIGH_BIT, true);
|
||||
i2c_master_write_byte(i2c_cmd_handle, sensitivity_data[0], true);
|
||||
i2c_master_stop(i2c_cmd_handle);
|
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esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
|
||||
err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
|
||||
i2c_cmd_link_delete(i2c_cmd_handle);
|
||||
if (esp_err != ESP_OK)
|
||||
{
|
||||
ESP_LOGE(TAG, "BH1750 adjust fail. I2C driver error.");
|
||||
return esp_err;
|
||||
ESP_LOGE(TAG, "BH1750 adjust fail. I2C driver error at line %d.", __LINE__);
|
||||
return ESP_ERR_INVALID_RESPONSE;
|
||||
}
|
||||
i2c_cmd_handle = i2c_cmd_link_create();
|
||||
i2c_master_start(i2c_cmd_handle);
|
||||
i2c_master_write_byte(i2c_cmd_handle, _init_config.i2c_address << 1 | I2C_MASTER_WRITE, true);
|
||||
i2c_master_write_byte(i2c_cmd_handle, (value & 0b00011111) | MEASUREMENT_TIME_LOW_BIT, true);
|
||||
i2c_master_write_byte(i2c_cmd_handle, sensitivity_data[1], true);
|
||||
i2c_master_stop(i2c_cmd_handle);
|
||||
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
|
||||
err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
|
||||
i2c_cmd_link_delete(i2c_cmd_handle);
|
||||
if (esp_err != ESP_OK)
|
||||
#else
|
||||
err = i2c_master_transmit(_bh1750_handle, &sensitivity_data[0], 1, 1000 / portTICK_PERIOD_MS);
|
||||
err = i2c_master_transmit(_bh1750_handle, &sensitivity_data[1], 1, 1000 / portTICK_PERIOD_MS);
|
||||
#endif
|
||||
if (err != ESP_OK)
|
||||
{
|
||||
ESP_LOGE(TAG, "BH1750 adjust fail. I2C driver error.");
|
||||
return esp_err;
|
||||
ESP_LOGE(TAG, "BH1750 adjust fail. I2C driver error at line %d.", __LINE__);
|
||||
return ESP_ERR_INVALID_RESPONSE;
|
||||
}
|
||||
if (_init_config.work_mode == CONTINUOUSLY)
|
||||
{
|
||||
_is_first_start = false;
|
||||
}
|
||||
_sensivity = value;
|
||||
ESP_LOGI(TAG, "BH1750 adjust success.");
|
||||
return ESP_OK;
|
||||
}
|
Loading…
x
Reference in New Issue
Block a user