diff --git a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c
index 353ba99..656035c 100644
--- a/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c
+++ b/vd960DBN/BLE/OnlyUpdateApp_Peripheral/APP/iot_mqtt_srv.c
@@ -73,10 +73,7 @@ static int iot_make_topic(char *out, uint16_t out_len, const char *direction,
 /* 发送 MQTT 报文到 broker */
 static int iot_mqtt_send(const uint8_t *buf, uint16_t len) {
     uint16_t slen = len;
-    uint8_t i;
-    PRINT("IOT: SocketSend sock=%d len=%d data:", g_iot_socket, len);
-    for (i = 0; i < len && i < 64; i++) PRINT(" %02X", buf[i]);
-    PRINT("\n");
+    PRINT("IOT: SocketSend sock=%d len=%d\n", g_iot_socket, len);
     uint8_t ret = WCHNET_SocketSend(g_iot_socket, (uint8_t *)buf, &slen);
     PRINT("IOT: SocketSend ret=0x%02X sent=%d\n", ret, slen);
     return (ret == WCHNET_ERR_SUCCESS) ? 0 : -1;