From 2c89bb82086b3bfacea6574aea4c99bd9924ff8f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=AD=94=E7=BD=97?= <master_roger@sina.com>
Date: Sun, 28 Nov 2021 15:57:36 +0800
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---
 at.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/at.c b/at.c
index ca00303..30b58f1 100644
--- a/at.c
+++ b/at.c
@@ -16,6 +16,8 @@
   * 2021-04-08     Morro        解决重复释放信号量导致命令出现等待超时的问题
   * 2021-05-15     Morro        优化URC匹配程序
   * 2021-07-20     Morro        增加锁,解决执行at_do_work时urc部分数据丢失问题
+  * 2021-11-20     Morro        按单字符处理接收,避免出现在urc事件中读取数据时
+  *                             导致后面数据丢失问题
   ******************************************************************************
   */
 #include "at.h"
@@ -317,7 +319,9 @@ static void urc_recv_process(at_obj_t *at, const char *buf, unsigned int size)
   */
 static void resp_notification(at_obj_t *at, at_return ret)
 {
-    at->ret = ret;
+    at->ret = ret;    
+    at->resp = NULL;
+
     at_sem_post(at->completed);
 }
 
@@ -398,7 +402,7 @@ void at_resume(at_obj_t *at)
   */
 void at_process(at_obj_t *at)
 {
-    char buf[16];
+    char buf[1];
     unsigned int len;
     if (!at_sem_wait(at->recv_lock, MAX_AT_LOCK_TIME))
         return;