# ESP32 ESP-IDF and ESP8266 RTOS SDK component for HTU20/HTU21 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_htu.git ``` In the application, add the component: ```c #include "zh_htu.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 aht_init_config.i2c_port = I2C_PORT; #else aht_init_config.i2c_handle = i2c_bus_handle; #endif zh_aht_init(&aht_init_config); float humidity = 0.0; float temperature = 0.0; for (;;) { zh_aht_read(&humidity, &temperature); 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.