fix at_vprintf and at_vprintfln and end_sign response

1 files changed, 13 insertions, 4 deletions

diff --git a/components/net/at/src/at_utils.c b/components/net/at/src/at_utils.c
index 8d8887fe5e..d75ee0990e 100644
--- a/components/net/at/src/at_utils.c
+++ b/components/net/at/src/at_utils.c
@@ -68,21 +68,30 @@ const char *at_get_last_cmd(rt_size_t *cmd_size)
 rt_size_t at_vprintf(rt_device_t device, const char *format, va_list args)
 {
     last_cmd_len = vsnprintf(send_buf, sizeof(send_buf), format, args);
+    if(last_cmd_len > sizeof(send_buf))
+        last_cmd_len = sizeof(send_buf);
 
 #ifdef AT_PRINT_RAW_CMD
     at_print_raw_cmd("sendline", send_buf, last_cmd_len);
 #endif
 
-    return rt_device_write(device, 0, send_buf, last_cmd_len);
+    return at_device_send(device, 0, send_buf, last_cmd_len);
 }
 
 rt_size_t at_vprintfln(rt_device_t device, const char *format, va_list args)
 {
     rt_size_t len;
 
-    len = at_vprintf(device, format, args);
+    last_cmd_len = vsnprintf(send_buf, sizeof(send_buf) - 2, format, args);
+    if(last_cmd_len > sizeof(send_buf) - 2)
+        last_cmd_len = sizeof(send_buf) - 2;
+    rt_memcpy(send_buf + last_cmd_len, "\r\n", 2);
 
-    rt_device_write(device, 0, "\r\n", 2);
+    len = last_cmd_len + 2;
 
-    return len + 2;
+#ifdef AT_PRINT_RAW_CMD
+    at_print_raw_cmd("sendline", send_buf, len);
+#endif
+
+    return at_device_send(device, 0, send_buf, len);
 }