diff --git a/components/net/at/include/at.h b/components/net/at/include/at.h
index 76e952944f078b4097be9d68265825c1eeb9adc6..782cb0c40030caf1eda9c701b2b246685771cdac 100644
--- a/components/net/at/include/at.h
+++ b/components/net/at/include/at.h
@@ -27,7 +27,7 @@
 
 #include <rtthread.h>
 
-#define AT_SW_VERSION                  "0.2.2"
+#define AT_SW_VERSION                  "0.2.3"
 
 #define DBG_ENABLE
 #define DBG_SECTION_NAME               "AT"
diff --git a/components/net/at/src/at_client.c b/components/net/at/src/at_client.c
index c2002d8094a528851acd1093724fa483a2ea8646..90fd3291c3a01cc8b8d16acd8e7dd8adce8f0327 100644
--- a/components/net/at/src/at_client.c
+++ b/components/net/at/src/at_client.c
@@ -547,7 +547,7 @@ static void client_parser(at_client_t client)
                     /* get the end data by response result, return response state END_OK. */
                     client->resp_status = AT_RESP_OK;
                 }
-                else if ((memcmp(client->recv_buffer, AT_RESP_END_ERROR, strlen(AT_RESP_END_ERROR)) == 0)
+                else if (strstr(client->recv_buffer, AT_RESP_END_ERROR)
                         || (memcmp(client->recv_buffer, AT_RESP_END_FAIL, strlen(AT_RESP_END_FAIL)) == 0))
                 {
                     client->resp_status = AT_RESP_ERROR;
@@ -577,7 +577,11 @@ static void client_parser(at_client_t client)
 
 static rt_err_t at_client_rx_ind(rt_device_t dev, rt_size_t size)
 {
-    rt_sem_release(at_client_local->rx_notice);
+    if (size > 0)
+    {
+        rt_sem_release(at_client_local->rx_notice);
+    }
+
     return RT_EOK;
 }
 
diff --git a/components/net/at/src/at_server.c b/components/net/at/src/at_server.c
index 639739d9c2ec3cfcf6ff3643d852baf6dc093bde..a148a20ab05d204a40f49ace3ea6467b06879513 100644
--- a/components/net/at/src/at_server.c
+++ b/components/net/at/src/at_server.c
@@ -433,7 +433,10 @@ __retry:
 
 static rt_err_t at_rx_ind(rt_device_t dev, rt_size_t size)
 {
-    rt_sem_release(at_server_local->rx_notice);
+    if (size > 0)
+    {
+        rt_sem_release(at_server_local->rx_notice);
+    }
 
     return RT_EOK;
 }