diff --git a/app/drivers/sertrf/protocol/resend_protl.c b/app/drivers/sertrf/protocol/resend_protl.c
index 519f477..b713223 100644
--- a/app/drivers/sertrf/protocol/resend_protl.c
+++ b/app/drivers/sertrf/protocol/resend_protl.c
@@ -153,7 +153,7 @@ int resend_recv_data(resend_device_t *resend_device, int timeout)
     {
         if(!resend_decode(resend_device, data[ret - ret_later - 1]))
         {
-            printf("tx_req %d rx_req %d retry_cnt %d cmd %d\r\n", resend_device->tx_frame.seq, resend_device->rx_frame.seq, resend_device->rx_frame.retry_cnt, resend_device->rx_frame.cmd);
+            // printf("tx_req %d rx_req %d retry_cnt %d cmd %d\r\n", resend_device->tx_frame.seq, resend_device->rx_frame.seq, resend_device->rx_frame.retry_cnt, resend_device->rx_frame.cmd);
 
             if(seq_lat == resend_device->rx_frame.seq){
                 resend_device->status.resend_flag = 1;
@@ -221,12 +221,14 @@ int resend_send_data(resend_device_t *resend_device, uint8_t cmd, void* data, ui
             os_thread_sleep(1);
         }
         // 超过允许的等待次数
-        if(resend_device->tx_frame.retry_cnt > RESEND_MAX_RETRY_CNT)
+        if(resend_device->tx_frame.retry_cnt > RESEND_MAX_RETRY_CNT && resend_device->status.ack_flag)
         {
             printf("timeout cnt max\n");
             resend_device->tx_frame.retry_cnt = 0;
             resend_device->status.ack_flag = 0;
             return -1;
+        } else if(!resend_device->status.ack_flag){
+            return ret;
         }
     }
     
@@ -254,14 +256,14 @@ int resend_parse_data(resend_device_t *resend_device)
         case RESEND_CMD_SET_PARAM:
             break;
         case RESEND_CMD_DATA_ACK:
-            for (size_t i = 0; i < resend_device->rx_frame.len; i++)
-            {
-                printf("%02X ", resend_device->rx_frame.payload[i]);
-            }
-            printf("\r\n");
             resend_send_cmd(resend_device, RESEND_CMD_ACK, 0);
             break;
+        case RESEND_CMD_OTA_GET_PARAM:
+            //针对OTA的应答
+            resend_device->status.ack_flag = 0;
+            break;
         case RESEND_CMD_OTA_START:
+            resend_device->handle_flag = RESEND_CMD_OTA_GET_PARAM;
             break;
         case RESEND_CMD_OTA_DATA:
             break;
diff --git a/app/drivers/sertrf/protocol/resend_protl.h b/app/drivers/sertrf/protocol/resend_protl.h
index 9fd4c8d..3232c6b 100644
--- a/app/drivers/sertrf/protocol/resend_protl.h
+++ b/app/drivers/sertrf/protocol/resend_protl.h
@@ -22,7 +22,7 @@
 #define RESEND_HEADER_0 0xFD
 #define RESEND_HEADER_1 0xFE
 
-#define RESEND_MAX_RETRY_CNT 5
+#define RESEND_MAX_RETRY_CNT 0
 //  命令类型
 typedef enum
 {
@@ -34,6 +34,7 @@ typedef enum
 
     RESEND_CMD_DATA_ACK = 0x06,
 
+    RESEND_CMD_OTA_GET_PARAM = 0x010,
     RESEND_CMD_OTA_START = 0x011,
     RESEND_CMD_OTA_DATA = 0x012,
     RESEND_CMD_OTA_END = 0x013