diff --git a/app/stm32fxxx_app/protocol/protocol_mqtt_bcu.c b/app/stm32fxxx_app/protocol/protocol_mqtt_bcu.c
index b7d680b..c543216 100644
--- a/app/stm32fxxx_app/protocol/protocol_mqtt_bcu.c
+++ b/app/stm32fxxx_app/protocol/protocol_mqtt_bcu.c
@@ -980,7 +980,7 @@ void protocol_build_temp_json(uint8_t i)
     cJSON_AddStringToObject(deviceObj, "devName", "BCU");
     cJSON_AddStringToObject(deviceObj, "devId", "001");
     cJSON_AddStringToObject(deviceObj, "sn", "SN123456");
-		cJSON_AddNumberToObject(deviceObj, "currentPack", i + 14);  // 当前包数
+		cJSON_AddNumberToObject(deviceObj, "currentPack", i + 13);  // 当前包数
     cJSON_AddNumberToObject(deviceObj, "totalPack", 16);       // 总包数
 
     // 构建 data 对象