diff --git a/modbus/modbus_block_host.cpp b/modbus/modbus_block_host.cpp
index fda126e..6c44133 100644
--- a/modbus/modbus_block_host.cpp
+++ b/modbus/modbus_block_host.cpp
@@ -14,6 +14,8 @@ void ModbusBlockHost::initialize(UART_HandleTypeDef *huart) {
   this->huart = huart;
   m_modbus_lock.init();
 }
+void ModbusBlockHost::enableDump(bool enable) { m_dump = enable; }
+
 void ModbusBlockHost::cleanRxBuff() {  //
   HAL_StatusTypeDef status;
   do {
@@ -23,13 +25,13 @@ void ModbusBlockHost::cleanRxBuff() {  //
 
 void ModbusBlockHost::uarttx(uint8_t *buff, size_t len) {
   ZASSERT(len < sizeof(txbuff));
-#if PRV_DEBUG
-  printf("uart_tx:\n");
-  for (size_t i = 0; i < len; i++) {
-    printf("%02x ", buff[i]);
+  if (m_dump) {
+    printf("uart_tx:\n");
+    for (size_t i = 0; i < len; i++) {
+      printf("%02x ", buff[i]);
+    }
+    printf("\n");
   }
-  printf("\n");
-#endif
   // HAL_UART_Transmit(huart, buff, len, 1000);
   HAL_UART_DMAStop(huart);
   HAL_StatusTypeDef ret = HAL_UART_Transmit_DMA(huart, buff, len);
@@ -54,15 +56,15 @@ bool ModbusBlockHost::uartrx(uint8_t *buff, size_t len, int overtimems) {
   for (size_t i = 0; i < overtimems; i++) {
     osDelay(3);
     if (HAL_UART_GetState(huart) == HAL_UART_STATE_READY) {
-#if PRV_DEBUG
-      if (status == HAL_OK) {
-        printf("uart_rx:");
-        for (size_t i = 0; i < len; i++) {
-          printf("%02x ", buff[i]);
+      if (m_dump) {
+        if (status == HAL_OK) {
+          printf("uart_rx:");
+          for (size_t i = 0; i < len; i++) {
+            printf("%02x ", buff[i]);
+          }
+          printf("\n");
         }
-        printf("\n");
       }
-#endif
       return true;
     }
   }
diff --git a/modbus/modbus_block_host.hpp b/modbus/modbus_block_host.hpp
index 52d67be..e5b6736 100644
--- a/modbus/modbus_block_host.hpp
+++ b/modbus/modbus_block_host.hpp
@@ -1,7 +1,7 @@
 #pragma once
 //
-#include "stm32basic/zbasic.h"
 #include "stm32basic/stm32basic.hpp"
+#include "stm32basic/zbasic.h"
 
 namespace iflytop {
 class ModbusBlockHost {
@@ -11,12 +11,14 @@ class ModbusBlockHost {
   uint8_t rxbuff[100];
 
   zmutex m_modbus_lock;
+  bool   m_dump= false;
 
  public:
   ModbusBlockHost();
   ~ModbusBlockHost();
 
   void initialize(UART_HandleTypeDef *huart);
+  void enableDump(bool enable);
 
   bool readReg03(uint8_t slaveAddr, uint16_t regAddr, uint16_t *regVal, int overtimems);
   bool readReg03Muti(uint8_t slaveAddr, uint16_t regAddr, uint16_t *regVal, int regNum, int overtimems);