diff --git a/Ubiquitous/XiZi_IIoT/board/xidatong-riscv64/third_party_driver/ethernet/connect_w5500.c b/Ubiquitous/XiZi_IIoT/board/xidatong-riscv64/third_party_driver/ethernet/connect_w5500.c
index 35ba6a68d..f0f69f360 100644
--- a/Ubiquitous/XiZi_IIoT/board/xidatong-riscv64/third_party_driver/ethernet/connect_w5500.c
+++ b/Ubiquitous/XiZi_IIoT/board/xidatong-riscv64/third_party_driver/ethernet/connect_w5500.c
@@ -325,7 +325,7 @@ void wiz_client_op_test(int argc, char *argv[]) {
   }
   KPrintf("wiz client to %d.%d.%d.%d:%d\n", ip[0], ip[1], ip[2], ip[3], port);
   uint8_t buf[g_wiznet_buf_size];
-  sscanf(argv[3], "%s", buf);
+  memcpy(buf, argv[3], len(argv[3]));
   while (1) {
     int ret =
         wiz_client_op(client_sock, buf, g_wiznet_buf_size, ip, port, SEND_DATA);