[解决]uart口打开成功，但是发AT超时或者没响应，请问是....

发布于 2019-03-12 09:39:42 浏览：2391 订阅该版

* 本帖最后由 lk1988900 于 2019-3-12 13:29 编辑 *

如题：LOG 1：
msh />at_client_init uart1
[I/at.clnt] AT client(V1.2.0) on device uart1 initialize success.
msh />at_client_test
[D/AT] send: 0000-0020: 41 54 45                                                                                              ATE
[E/at.clnt] execute command (ATE) timeout (500 ticks)!
[D/AT] send: 0000-0020: 41 54 2B 4C 43 54 53 57                                                                               AT+LCTSW
[E/at.clnt] execute command (AT+LCTSW) timeout (500 ticks)!
[E/at.sample] AT client send commands failed or return response error!

LOG2:
msh />at_net_init
[D/at.u9507c] Start initializing the U9507C module
m[D/AT] recvline: 0000-0020: 41 54 0D 0A                                                                                           AT..
[E/at.clnt] Read response buffer failed. The Response buffer size is out of buffer size(16)!
[0m
[D/AT] recvline: 0000-0020: 41 54 0D 0A                                                                                           AT..
[E/at.clnt] Read response buffer failed. The Response buffer size is out of buffer size(16)!
[D/AT] recvline: 0000-0020: 41 54 0D 0A                                                                                           AT..
[E/at.clnt] Read response buffer failed. The Response buffer size is out of buffer size(16)!
[D/AT] recvline: 0000-0020: 41 54 0D 0A                                                                                           AT..
[E/at.clnt] Read response buffer failed. The Response buffer size is out of buffer size(16)!
[D/AT] recvline: 0000-0020: 41 54 0D 0A                                                                                           AT..
[E/at.clnt] Read response buffer failed. The Response buffer size is out of buffer size(16)!
[D/AT] recvline: 0000-0020: 41 54 0D 0A                                                                                           AT..
[E/at.clnt] Read response buffer failed. The Response buffer size is out of buffer size(16)!
[D/AT] recvline: 0000-0020: 41 54 0D 0A                                                                                           AT..
[E/at.clnt] Read response buffer failed. The Response buffer size is out of buffer size(16)!
[D/AT] recvline: 0000-0020: 41 54 0D 0A                                                                                           AT..
[E/at.clnt] Read response buffer failed. The Response buffer size is out of buffer size(16)!
[D/AT] recvline: 0000-0020: 41 54 0D 0A                                                                                           AT..
[E/at.clnt] Read response buffer failed. The Response buffer size is out of buffer size(16)!
[D/AT] recvline: 0000-0020: 41 54 0D 0A                                                                                           AT..
[E/at.clnt] Read response buffer failed. The Response buffer size is out of buffer size(16)!
[E/at.clnt] wait connect timeout (5000 millisecond)!
[E/at.u9507c] AT network initialize failed (-2)!

log2好像是下边出现了问题：
if (at_client_wait_connect(U9507C_WAIT_CONNECT_TIME))
        {
            result = -RT_ETIMEOUT;
            goto __exit;
        }

请大家帮忙看看什么问题呢？有什么建议或者意见呢？感谢大家