diff --git a/include/zh_pcf8574.h b/include/zh_pcf8574.h
index 30e31f8..577b78d 100644
--- a/include/zh_pcf8574.h
+++ b/include/zh_pcf8574.h
@@ -73,6 +73,7 @@ extern "C"
     {
         uint8_t i2c_address; // The i2c address of PCF8574 expander that caused the interrupt.
         uint8_t gpio_number; // The GPIO that caused the interrupt.
+        bool gpio_level;     // The GPIO level that caused the interrupt.
     } zh_pcf8574_event_on_isr_t;
 
     /**
diff --git a/version.txt b/version.txt
index 867e524..589268e 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.2.0
\ No newline at end of file
+1.3.0
\ No newline at end of file
diff --git a/zh_pcf8574.c b/zh_pcf8574.c
index 69254cf..bbf38e3 100644
--- a/zh_pcf8574.c
+++ b/zh_pcf8574.c
@@ -223,6 +223,7 @@ static void IRAM_ATTR _zh_pcf8574_isr_processing_task(void *pvParameter)
             zh_pcf8574_event_on_isr_t event = {0};
             event.i2c_address = handle->i2c_address;
             event.gpio_number = 0xFF;
+            uint8_t old_reg = handle->gpio_status;
             uint8_t reg_temp = 0;
             esp_err_t err = _zh_pcf8574_read_register(handle, &reg_temp);
             if (err != ESP_OK)
@@ -232,9 +233,13 @@ static void IRAM_ATTR _zh_pcf8574_isr_processing_task(void *pvParameter)
             }
             for (uint8_t j = 0; j <= 7; ++j)
             {
-                if (((handle->gpio_work_mode & _gpio_matrix[j]) != 0) && ((reg_temp & _gpio_matrix[j]) == 0))
+                if ((handle->gpio_work_mode & _gpio_matrix[j]) != 0)
                 {
-                    event.gpio_number = j;
+                    if ((old_reg & _gpio_matrix[j]) != (reg_temp & _gpio_matrix[j]))
+                    {
+                        event.gpio_number = j;
+                        event.gpio_level = reg_temp & _gpio_matrix[j];
+                    }
                     break;
                 }
             }