diff --git a/main/ate0003.c b/main/ate0003.c
index 382ed3f..4472526 100644
--- a/main/ate0003.c
+++ b/main/ate0003.c
@@ -7,7 +7,7 @@ static zh_pcf8574_handle_t _button_handle = {0};
 static zh_pcf8574_handle_t _led_1_handle = {0};
 static zh_pcf8574_handle_t _led_2_handle = {0};
 static zh_pcf8574_handle_t _relay_handle = {0};
-static zh_pcf8574_handle_t lcd_handle = {0};
+static zh_pcf8574_handle_t _lcd_handle = {0};
 
 static zh_encoder_handle_t _power_encoder_handle = {0};
 static zh_encoder_handle_t _component_encoder_handle = {0};
@@ -125,8 +125,8 @@ static void _zh_pcf8574_init(void)
     config.i2c_address = RELAY_I2C_ADDRESS;
     zh_pcf8574_init(&config, &_relay_handle);
     config.i2c_address = LCD_I2C_ADDRESS;
-    zh_pcf8574_init(&config, &lcd_handle);
-    zh_160x_init(&lcd_handle, ZH_LCD_16X4);
+    zh_pcf8574_init(&config, &_lcd_handle);
+    zh_160x_init(&_lcd_handle, ZH_LCD_16X4);
     config.p0_gpio_work_mode = true;
     config.p1_gpio_work_mode = true;
     config.p2_gpio_work_mode = true;
@@ -299,9 +299,9 @@ static void _zh_encoder_event_handler(void *arg, esp_event_base_t event_base, in
     switch (event->encoder_number)
     {
     case POWER_ENCODER:
-        zh_160x_set_cursor(&lcd_handle, 0, 11);
-        zh_160x_print_int(&lcd_handle, (uint8_t)event->encoder_position);
-        zh_160x_print_char(&lcd_handle, "% ");
+        zh_160x_set_cursor(&_lcd_handle, 0, 11);
+        zh_160x_print_int(&_lcd_handle, (uint8_t)event->encoder_position);
+        zh_160x_print_char(&_lcd_handle, "% ");
         zh_ac_dimmer_set(event->encoder_position);
         break;
     case COMPONENT_ENCODER: