diff --git a/main/ble_spp_client_demo.c b/main/ble_spp_client_demo.c
index 3f64e82..7c6f16d 100644
--- a/main/ble_spp_client_demo.c
+++ b/main/ble_spp_client_demo.c
@@ -602,7 +602,7 @@ void uart_task(void *pvParameters)
             {
             // Event of UART receving data
             case UART_DATA:
-                if (event.size && (is_connect == true) && (db != NULL) && ((db + SPP_IDX_SPP_COMMAND_VAL)->properties & (ESP_GATT_CHAR_PROP_BIT_WRITE_NR | ESP_GATT_CHAR_PROP_BIT_WRITE)))
+                if (event.size && (is_connect == true) && (db != NULL) && ((db + SPP_IDX_SPP_DATA_RECV_VAL)->properties & (ESP_GATT_CHAR_PROP_BIT_WRITE_NR | ESP_GATT_CHAR_PROP_BIT_WRITE)))
                 {
                     uint8_t *temp = NULL;
                     temp = (uint8_t *)malloc(sizeof(uint8_t) * event.size);
@@ -615,7 +615,7 @@ void uart_task(void *pvParameters)
                     uart_read_bytes(UART_NUM_0, temp, event.size, portMAX_DELAY);
                     esp_ble_gattc_write_char(spp_gattc_if,
                                              spp_conn_id,
-                                             (db + SPP_IDX_SPP_COMMAND_VAL)->attribute_handle,
+                                             (db + SPP_IDX_SPP_DATA_RECV_VAL)->attribute_handle,
                                              event.size,
                                              temp,
                                              ESP_GATT_WRITE_TYPE_RSP,
@@ -695,11 +695,11 @@ void ble_init()
 
 void ble_key_cb(char* string)
 {
-    if ((is_connect == true) && (db != NULL) && ((db + SPP_IDX_SPP_COMMAND_VAL)->properties & (ESP_GATT_CHAR_PROP_BIT_WRITE_NR | ESP_GATT_CHAR_PROP_BIT_WRITE)))
+    if ((is_connect == true) && (db != NULL) && ((db + SPP_IDX_SPP_DATA_RECV_VAL)->properties & (ESP_GATT_CHAR_PROP_BIT_WRITE_NR | ESP_GATT_CHAR_PROP_BIT_WRITE)))
     {
         esp_ble_gattc_write_char(spp_gattc_if,
                                  spp_conn_id,
-                                 (db + SPP_IDX_SPP_COMMAND_VAL)->attribute_handle,
+                                 (db + SPP_IDX_SPP_DATA_RECV_VAL)->attribute_handle,
                                  strlen(string),
                                  (uint8_t *)string,
                                  ESP_GATT_WRITE_TYPE_RSP,
diff --git a/main/ble_spp_client_demo.h b/main/ble_spp_client_demo.h
index d034d7b..0f0363f 100644
--- a/main/ble_spp_client_demo.h
+++ b/main/ble_spp_client_demo.h
@@ -22,7 +22,7 @@ enum
 
     SPP_IDX_SPP_DATA_RECV_VAL,
 
-    SPP_IDX_SPP_COMMAND_VAL,
+    // SPP_IDX_SPP_COMMAND_VAL,
 
 #ifdef SUPPORT_HEARTBEAT
     SPP_IDX_SPP_HEARTBEAT_VAL,
diff --git a/main/key.c b/main/key.c
index 0166261..3bee427 100644
--- a/main/key.c
+++ b/main/key.c
@@ -26,7 +26,7 @@ void key_schedule()
         while (gpio_get_level(KEY_REC) == 0)
         {
         }
-        s_ble_key_cb("setPosition180");
+        s_ble_key_cb("{ \"order\": \"setPosition\", \"index\": 0, \"speedLevel\": 0, \"position\": 180, \"direction\": 1 }");
         ESP_LOGI("Finny", "stop");
     }
     if (gpio_get_level(KEY_MODE) == 0)
@@ -36,7 +36,7 @@ void key_schedule()
         while (gpio_get_level(KEY_MODE) == 0)
         {
         }
-        s_ble_key_cb("setPosition360");
+        s_ble_key_cb("{ \"order\": \"setPosition\", \"index\": 0, \"speedLevel\": 0, \"position\": 360, \"direction\": 1 }");
         ESP_LOGI("Finny", "stop");
     }
 }