Am 07.11.2017 16:11, schrieb Léo Serre:
> Hello world,
>
> I'm using pppd with a SARA-U201 3G+ modem (from u-blox).
> It works fine normally, except in that case:
>
> 1. pppd is connected to the modem correctly
> 2. pppd is stopped using poff
> 3. The chat script is changed by the user
> 4. pppd is started using pon
>
> That introduces an error, since the modem won't accept a new PIN code as
> it is already connected correctly.
>
> The way to fix that is to send a SW reset AT command 'AT+CFUN=1,1'
> between steps 2 and 4.
> That's why I introduced a new disconnect chat script which consists of:
>
> ABORT 'BUSY'
> ABORT 'NO CARRIER'
> ABORT 'VOICE'
> ABORT 'NO DIALTONE'
> ABORT 'NO DIAL TONE'
> ABORT 'NO ANSWER'
> ABORT 'DELAYED'
> TIMEOUT 180
> 'OK' 'AT+CFUN=1,1'
>
> I have the following output:
>
> Jan 1 02:24:47 domeradio local2.info chat[568]: abort on (BUSY)
> Jan 1 02:24:47 domeradio local2.info chat[568]: abort on (NO CARRIER)
> Jan 1 02:24:47 domeradio local2.info chat[568]: abort on (VOICE)
> Jan 1 02:24:47 domeradio local2.info chat[568]: abort on (NO DIALTONE)
> Jan 1 02:24:47 domeradio local2.info chat[568]: abort on (NO DIAL TONE)
> Jan 1 02:24:47 domeradio local2.info chat[568]: abort on (NO ANSWER)
> Jan 1 02:24:47 domeradio local2.info chat[568]: abort on (DELAYED)
> Jan 1 02:24:47 domeradio local2.info chat[568]: timeout set to 180 seconds
> Jan 1 02:24:47 domeradio local2.info chat[568]: expect (OK)
> Jan 1 02:24:49 domeradio local2.err chat[568]: SIGTERM
^^^^^^
You are expecting a 'ok' from the modem that never appears -> timeout
did you try '' 'AT+CFUN=1,1' ?
> Jan 1 02:24:49 domeradio daemon.warn pppd[534]: Child process
> /usr/sbin/chat -v -t15 -f /etc/ppp/chatscripts/mobile-modem-off.chat
> (pid 567) terminated with signal 15
> Jan 1 02:24:49 domeradio daemon.warn pppd[534]: disconnect script failed
> Jan 1 02:24:50 domeradio daemon.info pppd[534]: Exit.
>
> It seems that the command is never sent.
>
> My two questions are:
>
> 1. Do you have an idea about the command that is never sent?
> 2. Is there an other way to send an AT command while pppd is running
> (or none)?
>
> Thank you,
>
> Léo SERRE
> 🌍 [email protected] <mailto:[email protected]>
> 📧 lstronic.com <http://lstronic.com>
>
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