doc: updated readme

README.md

@@ -11,6 +11,7 @@
 ## Features
 
 1. Support of AHT10/AHT15/AHT20/AHT21/AHT25/AHT30.
+2. Support some sensors on one device with [zh_pca9548a](https://github.com/aZholtikov/zh_pca9548a).
 
 ## Attention
 
@@ -76,3 +77,69 @@ void app_main(void)
     }
 }
 ```
+
+3 sensor on one device:
+
+```c
+#include "zh_pca9548a.h"
+#include "zh_aht.h"
+
+#define I2C_PORT (I2C_NUM_MAX - 1)
+
+zh_pca9548a_handle_t pca9548a_handle = {0};
+zh_aht_handle_t aht_handle_chan_0 = {0};
+zh_aht_handle_t aht_handle_chan_1 = {0};
+zh_aht_handle_t aht_handle_chan_2 = {0};
+
+void app_main(void)
+{
+    esp_log_level_set("zh_pca9548a", ESP_LOG_ERROR);
+    esp_log_level_set("zh_aht", ESP_LOG_ERROR);
+    i2c_master_bus_config_t i2c_bus_config = {
+        .clk_source = I2C_CLK_SRC_DEFAULT,
+        .i2c_port = I2C_PORT,
+        .scl_io_num = GPIO_NUM_22,
+        .sda_io_num = GPIO_NUM_21,
+        .glitch_ignore_cnt = 7,
+        .flags.enable_internal_pullup = true,
+    };
+    i2c_master_bus_handle_t i2c_bus_handle = NULL;
+    i2c_new_master_bus(&i2c_bus_config, &i2c_bus_handle);
+    zh_pca9548a_init_config_t config = ZH_PCA9548A_INIT_CONFIG_DEFAULT();
+    config.i2c_handle = i2c_bus_handle;
+    config.i2c_address = 0x70;
+    zh_pca9548a_init(&config, &pca9548a_handle);
+    zh_aht_init_config_t aht_config = ZH_AHT_INIT_CONFIG_DEFAULT();
+    aht_config.i2c_handle = i2c_bus_handle;
+    zh_pca9548a_set(&pca9548a_handle, ZH_PCA9548A_CHAN_NUM_0);
+    zh_aht_init(&aht_config, &aht_handle_chan_0);
+    zh_pca9548a_set(&pca9548a_handle, ZH_PCA9548A_CHAN_NUM_1);
+    zh_aht_init(&aht_config, &aht_handle_chan_1);
+    zh_pca9548a_set(&pca9548a_handle, ZH_PCA9548A_CHAN_NUM_2);
+    zh_aht_init(&aht_config, &aht_handle_chan_2);
+    float humidity = 0.0;
+    float temperature = 0.0;
+    for (;;)
+    {
+        zh_pca9548a_set(&pca9548a_handle, ZH_PCA9548A_CHAN_NUM_0);
+        zh_aht_read(&aht_handle_chan_0, &humidity, &temperature);
+        printf("Sensor 1. Humidity %0.2f\n", humidity);
+        printf("Sensor 1. Temperature %0.2f\n", temperature);
+        humidity = 0.0;
+        temperature = 0.0;
+        zh_pca9548a_set(&pca9548a_handle, ZH_PCA9548A_CHAN_NUM_1);
+        zh_aht_read(&aht_handle_chan_1, &humidity, &temperature);
+        printf("Sensor 2. Humidity %0.2f\n", humidity);
+        printf("Sensor 2. Temperature %0.2f\n", temperature);
+        humidity = 0.0;
+        temperature = 0.0;
+        zh_pca9548a_set(&pca9548a_handle, ZH_PCA9548A_CHAN_NUM_2);
+        zh_aht_read(&aht_handle_chan_2, &humidity, &temperature);
+        printf("Sensor 3. Humidity %0.2f\n", humidity);
+        printf("Sensor 3. Temperature %0.2f\n", temperature);
+        humidity = 0.0;
+        temperature = 0.0;
+        vTaskDelay(5000 / portTICK_PERIOD_MS);
+    }
+}
+```