diff --git a/ble_through/ble_proto_utils.c b/ble_through/ble_proto_utils.c
index 4ae8e07..10a260d 100644
--- a/ble_through/ble_proto_utils.c
+++ b/ble_through/ble_proto_utils.c
@@ -3,6 +3,12 @@
 #include <stdio.h>
 #include <string.h>
 
+static zble_proto_role_t m_from;
+
+void zble_proto_utils_init(zble_proto_role_t from) {  //
+  m_from = from;
+}
+
 bool ble_through_proto_check_packet(zble_proto_packet_t *packet) {
   uint8_t *pu8 = (uint8_t *)packet;
 
@@ -42,17 +48,18 @@ void zble_proto_utils_create_cmd_packet(zble_proto_packet_t *packet, uint16_t cm
   packet->frameType  = kzble_proto_cmd;
   packet->frameIndex = index;
   packet->cmd        = cmd;
-  packet->from       = kzble_upper;
+  packet->from       = m_from;
   packet->to         = kzble_slave;
   memcpy((void *)packet->data, data, datalen);
   BLE_THROUGH_PACKET_SET_CHECKSUM(packet);
   BLE_THROUGH_PACKET_SET_TAIL(packet);
 }
 
-void zble_proto_utils_create_cmd_packet_int32(zble_proto_packet_t *packet, uint16_t cmd, uint8_t index, int32_t *data, int32_t ndata) { zble_proto_utils_create_cmd_packet(packet, cmd, index, (uint8_t *)data, ndata * 4); }
-
+void zble_proto_utils_create_cmd_packet_int32(zble_proto_packet_t *packet, uint16_t cmd, uint8_t index, int32_t *data, int32_t ndata) {
+  zble_proto_utils_create_cmd_packet(packet, cmd, index, (uint8_t *)data, ndata * 4);
+}
 
-void zble_proto_utils_create_error_receipt(zble_proto_packet_t* packet, zble_proto_packet_t* rxpacket, int32_t errorcode) {
+void zble_proto_utils_create_error_receipt(zble_proto_packet_t *packet, zble_proto_packet_t *rxpacket, int32_t errorcode) {
   int32_t packetlen  = BLE_THROUGH_PACKET_BASE_SIZE() + sizeof(errorcode);
   packet->h1         = PACKET_H1;
   packet->h2         = PACKET_H2;
@@ -60,15 +67,15 @@ void zble_proto_utils_create_error_receipt(zble_proto_packet_t* packet, zble_pro
   packet->frameType  = kzble_proto_error_receipt;
   packet->frameIndex = rxpacket->frameIndex;
   packet->cmd        = rxpacket->cmd;
-  packet->from       = kzble_slave;
+  packet->from       = m_from;
   packet->to         = kzble_upper;
 
-  memcpy((void*)packet->data, (void*)&errorcode, 4);
+  memcpy((void *)packet->data, (void *)&errorcode, 4);
   BLE_THROUGH_PACKET_SET_CHECKSUM(packet);
   BLE_THROUGH_PACKET_SET_TAIL(packet);
   //
 }
-void zble_proto_utils_create_receipt(zble_proto_packet_t* packet, zble_proto_packet_t* rxpacket, uint8_t* data, int32_t len) {
+void zble_proto_utils_create_receipt(zble_proto_packet_t *packet, zble_proto_packet_t *rxpacket, uint8_t *data, int32_t len) {
   int32_t packetlen  = BLE_THROUGH_PACKET_BASE_SIZE() + len;
   packet->h1         = PACKET_H1;
   packet->h2         = PACKET_H2;
@@ -76,17 +83,17 @@ void zble_proto_utils_create_receipt(zble_proto_packet_t* packet, zble_proto_pac
   packet->frameType  = kzble_proto_cmd_receipt;
   packet->frameIndex = rxpacket->frameIndex;
   packet->cmd        = rxpacket->cmd;
-  packet->from       = kzble_slave;
+  packet->from       = m_from;
   packet->to         = kzble_upper;
 
   // memcpy((void*)packet->data, (void*)&errorcode, 4);
-  memcpy((void*)packet->data, (void*)data, len);
+  memcpy((void *)packet->data, (void *)data, len);
   BLE_THROUGH_PACKET_SET_CHECKSUM(packet);
   BLE_THROUGH_PACKET_SET_TAIL(packet);
   //
 }
 
-void zble_proto_utils_create_report(zble_proto_packet_t* packet, uint16_t index, uint16_t cmd, uint8_t* data, int32_t len) {
+void zble_proto_utils_create_report(zble_proto_packet_t *packet, uint16_t index, uint16_t cmd, uint8_t *data, int32_t len) {
   int32_t packetlen  = BLE_THROUGH_PACKET_BASE_SIZE() + len;
   packet->h1         = PACKET_H1;
   packet->h2         = PACKET_H2;
@@ -94,11 +101,11 @@ void zble_proto_utils_create_report(zble_proto_packet_t* packet, uint16_t index,
   packet->frameType  = kzble_proto_report;
   packet->frameIndex = index;
   packet->cmd        = cmd;
-  packet->from       = kzble_slave;
+  packet->from       = m_from;
   packet->to         = kzble_upper;
 
   // memcpy((void*)packet->data, (void*)&errorcode, 4);
-  memcpy((void*)packet->data, (void*)data, len);
+  memcpy((void *)packet->data, (void *)data, len);
   BLE_THROUGH_PACKET_SET_CHECKSUM(packet);
   BLE_THROUGH_PACKET_SET_TAIL(packet);
   //
diff --git a/ble_through/ble_proto_utils.h b/ble_through/ble_proto_utils.h
index fe14eac..6a33904 100644
--- a/ble_through/ble_proto_utils.h
+++ b/ble_through/ble_proto_utils.h
@@ -23,6 +23,8 @@ extern "C" {
 bool    ble_through_proto_check_packet(zble_proto_packet_t *packet);
 uint8_t ble_through_proto_sum(zble_proto_packet_t *packet);
 
+void zble_proto_utils_init(zble_proto_role_t from);
+
 void zble_proto_utils_create_cmd_packet(zble_proto_packet_t *packet, uint16_t cmd, uint8_t index, uint8_t *data, int32_t datalen);
 void zble_proto_utils_create_cmd_packet_int32(zble_proto_packet_t *packet, uint16_t cmd, uint8_t index, int32_t *data, int32_t ndata);