diff --git a/main/main.c b/main/main.c
index ab90e3c..0e6fbb0 100644
--- a/main/main.c
+++ b/main/main.c
@@ -20,6 +20,8 @@
 #define ble_uart_tx_size 128
 #define ble_uart_rx_size 128
 
+#define construct_cmd_packet_buffer_size 256
+
 typedef struct {
   int index;
   const char *order;
@@ -40,23 +42,23 @@ bleuart_t ble_uart_init_struct = {
 };
 motor_t ble_uart_motor_structer = {.uartNum = UART_NUM_1};
 
-void order_receipt_setPosition(int index, uint8_t setPosition_code) {
-  uint8_t buffer[256] = {0};
+void construct_set_position_packet_and_report(int index, uint8_t setPosition_code) {
+  uint8_t buffer[construct_cmd_packet_buffer_size] = {0};
 
   ESP_LOGI(MAIN_LOG_TAG, "Command setPosition execution complete!");
 
   if (setPosition_code == 0) {
-    sprintf((char *)buffer, "{ \"order\": \"receipt\", \"code\": %d, \"info\": \"success\", \"index\": %d }", setPosition_code, index);
+    snprintf((char *)buffer, construct_cmd_packet_buffer_size, "{ \"order\": \"receipt\", \"code\": %d, \"info\": \"success\", \"index\": %d }", setPosition_code, index);
     bleuart_notify_send(buffer, strlen((char *)buffer));
   } else {
-    sprintf((char *)buffer, "{ \"order\": \"receipt\", \"code\": %d, \"info\": \"error\", \"index\": %d }", setPosition_code, index);
+    snprintf((char *)buffer, construct_cmd_packet_buffer_size, "{ \"order\": \"receipt\", \"code\": %d, \"info\": \"error\", \"index\": %d }", setPosition_code, index);
     bleuart_notify_send(buffer, strlen((char *)buffer));
   }
 }
 
 void construct_get_status_packet_and_report(int index, double motor_position) {
-  uint8_t buffer[256] = {0};
-  snprintf((char *)buffer, 256,
+  uint8_t buffer[construct_cmd_packet_buffer_size] = {0};
+  snprintf((char *)buffer, construct_cmd_packet_buffer_size,
            "{ \"order\": \"receipt\", \"index\": %d, \"deviceState\": \"running\", \"deviceException\": 0, \"deviceExceptionInfo\": "
            ", \"position\":%lf }",
            index, motor_position);
@@ -64,11 +66,11 @@ void construct_get_status_packet_and_report(int index, double motor_position) {
   bleuart_notify_send(buffer, strlen((char *)buffer));
 }
 
-void order_receipt_setMotorCurrentSize(int index) {
-  ESP_LOGI(MAIN_LOG_TAG, "Command setMotorCurrentSize execution complete!");
-  uint8_t buffer[256] = {0};
+void construct_set_motorCurrentSize_packet_and_report(int index) {
+  uint8_t buffer[construct_cmd_packet_buffer_size] = {0};
 
-  sprintf((char *)buffer, "{ \"order\": \"receipt\", \"index\": %d }", index);
+  snprintf((char *)buffer, construct_cmd_packet_buffer_size, "{ \"order\": \"receipt\", \"index\": %d }", index);
+  ESP_LOGI(MAIN_LOG_TAG, "report %s", buffer);
   bleuart_notify_send(buffer, strlen((char *)buffer));
 }
 
@@ -94,7 +96,7 @@ void process_setPosition(RxContext_t *context, cJSON *rxjson) {
   }
   ESP_LOGI(MAIN_LOG_TAG, "index = %d,speedLevel = %d,position = %lf,direction = %d", index, speedLevel, position, direction);
   setPosition_code = motor_run_to_postion(1, position, 0);
-  order_receipt_setPosition(index, setPosition_code);
+  construct_set_position_packet_and_report(index, setPosition_code);
 }
 
 void process_getStatus(cJSON *rxjson) {
@@ -114,7 +116,7 @@ void process_setMotorCurrentSize(cJSON *rxjson) {
 
   motor_set_zero_point();
 
-  order_receipt_setMotorCurrentSize(index);
+  construct_set_motorCurrentSize_packet_and_report(index);
 }
 
 void processrxjson(cJSON *rxjson) {
@@ -155,14 +157,14 @@ void motor_on_event(motor_event_t event) {
   //打算使用sprintf
   if (event == kRunToPosition) {
     ESP_LOGI(MAIN_LOG_TAG, "motor_on_event: kRunToPosition");
-    uint8_t buffer[256] = {0};
+    uint8_t buffer[construct_cmd_packet_buffer_size] = {0};
     double motor_stop_position = motor_get_position_degree();
 
     //{ "order": "deviceStatusReport", "ble_uart_index": 0, "deviceState": "running", "position":13.9, "deviceException": 0, "deviceExceptionInfo": ""}
-    sprintf((char *)buffer,
-            "{ \"order\": \"deviceStatusReport\", \"index\": %d, \"deviceState\": \"idel\", \"position\":%.2lf, \"deviceException\": 0, \"deviceExceptionInfo\": \"\" }",  //
-            /*index     :*/ 1,                                                                                                                                             //
-            /*position  :*/ motor_stop_position                                                                                                                            //
+    snprintf((char *)buffer, construct_cmd_packet_buffer_size,
+             "{ \"order\": \"deviceStatusReport\", \"index\": %d, \"deviceState\": \"idel\", \"position\":%.2lf, \"deviceException\": 0, \"deviceExceptionInfo\": \"\" }",  //
+             /*index     :*/ 1,                                                                                                                                             //
+             /*position  :*/ motor_stop_position                                                                                                                            //
     );
     bleuart_notify_send(buffer, strlen((char *)buffer));
   }