diff --git a/README.md b/README.md
index 6a72704..40ade3d 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,11 @@
 1. ESP8266 RTOS_SDK v3.4
 2. ESP32 ESP-IDF v5.2
 
+## Features
+
+1. Recorded illuminance values from 0.11 to 121241 lux (depends on operation mode and sensitivity).
+2. Support automatically sensitivity adjustment.
+
 ## Using
 
 In an existing project, run the following command to install the component:
@@ -66,7 +71,7 @@ void app_main(void)
     for (;;)
     {
         zh_bh1750_read(&lux);
-        printf("Lux %d\n", (uint32_t)lux);
+        printf("Lux %0.2f\n", lux);
         vTaskDelay(1000 / portTICK_PERIOD_MS);
     }
 }
diff --git a/include/zh_bh1750.h b/include/zh_bh1750.h
index c086236..91dda44 100644
--- a/include/zh_bh1750.h
+++ b/include/zh_bh1750.h
@@ -19,7 +19,8 @@
         .i2c_address = I2C_ADDRESS_LOW,    \
         .operation_mode = HIGH_RESOLUTION, \
         .work_mode = ONE_TIME,             \
-        .i2c_port = 0                      \
+        .i2c_port = 0,                     \
+        .auto_adjust = false               \
     }
 
 #ifdef __cplusplus
@@ -52,7 +53,8 @@ extern "C"
             CONTINUOUSLY, // Continuously measurement.
             ONE_TIME      // One time measurement. Sensor is power down after measurement.
         } work_mode;
-        bool i2c_port; // I2C port.
+        bool i2c_port;    // I2C port.
+        bool auto_adjust; // Flag of automatic sensitivity adjustment.
 #ifndef CONFIG_IDF_TARGET_ESP8266
         i2c_master_bus_handle_t i2c_handle; // Unique I2C bus handle.
 #endif
diff --git a/zh_bh1750.c b/zh_bh1750.c
index 6377a6e..28afeb1 100644
--- a/zh_bh1750.c
+++ b/zh_bh1750.c
@@ -84,6 +84,7 @@ esp_err_t zh_bh1750_read(float *data)
         ESP_LOGE(TAG, "BH1750 read fail. BH1750 not initialized.");
         return ESP_ERR_NOT_FOUND;
     }
+REPEATE:
     esp_err_t esp_err = ESP_OK;
     uint8_t sensor_data[2] = {0};
     if (_init_config.work_mode == CONTINUOUSLY)
@@ -132,13 +133,39 @@ READ:
         ESP_LOGE(TAG, "BH1750 read fail. I2C driver error.");
         return esp_err;
     }
+    uint32_t raw_data = sensor_data[0] << 8 | sensor_data[1];
+    if (raw_data == 65536 || raw_data == 0)
+    {
+        ESP_LOGW(TAG, "BH1750 read error. Sensitivity adjustment required. Current sensivity level %d", _sensivity);
+    }
+    if (_init_config.auto_adjust == true)
+    {
+        printf("RAW data %ld\n", raw_data);
+        printf("Sensivity %d\n", _sensivity);
+        if (raw_data == 65536 && _sensivity > 31)
+        {
+            if (zh_bh1750_adjust(_sensivity - 1) == ESP_OK)
+            {
+                --_sensivity;
+                goto REPEATE;
+            }
+        }
+        if (raw_data == 0 && _sensivity < 254)
+        {
+            if (zh_bh1750_adjust(_sensivity + 1) == ESP_OK)
+            {
+                ++_sensivity;
+                goto REPEATE;
+            }
+        }
+    }
     if (_init_config.operation_mode == HIGH_RESOLUTION_2)
     {
-        *data = (sensor_data[0] << 8 | sensor_data[1]) * (1 / 1.2 * (69.0 / _sensivity) / 2);
+        *data = raw_data * (1 / 1.2 * (69.0 / _sensivity) / 2);
     }
     else
     {
-        *data = (sensor_data[0] << 8 | sensor_data[1]) * (1 / 1.2 * (69.0 / _sensivity));
+        *data = raw_data * (1 / 1.2 * (69.0 / _sensivity));
     }
     ESP_LOGI(TAG, "BH1750 read success.");
     return ESP_OK;