Re: [lwip-users] PPPoS: Question regarding reconnect after connection lost

[Axel Lin]

2017-04-06 21:18 GMT+08:00 Sylvain Rochet <address@hidden>:
> Hi Axel,
>
> On Thu, Apr 06, 2017 at 08:58:10PM +0800, Axel Lin wrote:
>>
>> Below is what I do to start PPP:
>>
>> Send "AT+CGDCONT=<cid>,<PDP type>,<APN>"
>> Send "AT+CGAUTH=<cid>[, <auth_prot>[, <userId>, <password>]]"
>> Send "AT+CFUN=1"
>> Send "ATD*99***<cid>#"
>>
>> ppp_set_usepeerdns(ppp, 1);
>> ppp_set_auth(ppp, PPPAUTHTYPE_ANY, userId, password);
>> ppp_connect(ppp, 0);
>>
>> My understanding is after ATD*99***1#, I cannot send AT commands.
>> So it's not clear to me if I need to re-send above AT commands after got
>> PPPERR_CONNECT. Currently I just call ppp_connect(ppp, 30); to reconnect.
>
> You have to resend AT commands to reconnect. You need to switch back
> your modem to command mode before, either by using DTR signal or by
> using a predefined escape sequence that could never happen in the PPP
> flow (which I do not recommend unless you are very careful with the
> chosen asyncmap).

Hi Sylvain,
By following your suggestions, now it works.

Thanks,
Axel