diff --git a/main.c b/main.c
index 5eb26ef..8e91ac0 100644
--- a/main.c
+++ b/main.c
@@ -59,7 +59,7 @@ int fd;
 int UPCASE=0;
 int count_value=0;
 int getPayloadTime=120*1000;//usecond
-char softwareVersion[16]="1.1.15";
+char softwareVersion[16]="1.1.16";
 char stationsn[16]="TJ251372224247";//TJ250995217957
 char productid[8]="10045";
 char appKey[32]="fdhQmhqhvbL1cf1K9mUqt";
@@ -1823,6 +1823,7 @@ void *thread_mqtt_recv(void *arg){
                                 system("unzip /userdata/tx_ota.zip");
                                 //system("mv ../tx_ota/* /userdata/ota");
                                 //system("rm -fr /userdata/ota/tx_ota");
+                                system("rm -fr /userdata/ota");
                                 system("mv /userdata/tx_ota /userdata/ota");
                                 system("mv /userdata/ota/ustart.sh /userdata");
                                 system("sync");