I've played with this a bit in minicom and made a few discoveries. Seems that it is not idle time, rather only the first incoming message triggers notification, until CNMI is called once more at which point any pending messages come through.
I've changed my keepalive cmd to be the AT+CNMI config command, but that seems like a hack, and potentially induces a 59 second lag between reacting to an SMS. Anybody seen this before or have any clues? Worst case can I append the CNMI command at the end of the processing of incoming SMSs? Didn't see an obvious config value for that. My minicom session below. (comments in bracket) AT S7=45 S0=0 L1 V1 X4 &c1 E1 Q0 OK AT+CMGS=? OK AT+CNMI=? +CNMI: (0,1,2),(0,1,2,3),(0,2),(0,1,2),(0,1) OK AT+CNMI=1,2,0,1,0 OK [ at this point i receive an sms ] +CMT: ,23 07912160130320F4040B912160779992F400009070914131948A04D4F29C0E [ but more sms's will not arrive until i reissue cnmi] AT+CNMI=1,2,0,1,0 OK +CMTI: "SM",8 +CMTI: "SM",9 +CMT: ,23 07914140540500F7040B912160779992F400009070914161028A04D4F29C8E [ again, at this point, i am stuck until reussing cnmi] AT+CNMI=1,2,0,1,0 OK +CMTI: "SM",10 +CMTI: "SM",11 On Sun, Jul 19, 2009 at 11:32 AM, Nic Pottier <[email protected]> wrote: > Howdy All, > > I am having a problem where SMS's stop being received after a minute or two > of inactivity. Receiving the messages works fine immediately after startup > but then nothing. > > This is using a Sierra Wireless 875 PCMCIA aircard, using the following > config. Log is attached below showing reception of one message, but then > nothing even though the keep-alive messages are ACK'ing ok. > > group = smsc > smsc = at > modemtype = auto > device=/dev/ttyUSB0 > my-number = 12063595733 > connect-allow-ip = 127.0.0.1 > keepalive=60 > log-level = 0 > > I'm using a 60 second keepalive but that doesn't seem to be helping. Any > other ideas? > > 2009-07-19 11:18:52 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: Found <14> modems > in config > 2009-07-19 11:18:52 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT+CSMS=?^M > 2009-07-19 11:18:52 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- +CSMS: (0-1) > 2009-07-19 11:18:52 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:18:52 [10835] [6] INFO: AT2[/dev/ttyUSB0]: Closing device > 2009-07-19 11:18:52 [10835] [6] INFO: AT2[/dev/ttyUSB0]: opening device > 2009-07-19 11:18:52 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: device opened. > Telnet mode = 0 > 2009-07-19 11:18:52 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: device opened > 2009-07-19 11:18:52 [10835] [6] INFO: AT2[/dev/ttyUSB0]: Logging in > 2009-07-19 11:18:53 [10835] [6] INFO: AT2[/dev/ttyUSB0]: init device > 2009-07-19 11:18:53 [10835] [6] INFO: AT2[/dev/ttyUSB0]: speed set to > 115200 > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> ATZ^M > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT^M > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- AT > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT&F^M > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- AT&F > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> ATE0^M > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- ATE0 > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT+IFC=2,2^M > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:18:53 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT+CPIN?^M > 2009-07-19 11:18:54 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- +CPIN: READY > 2009-07-19 11:18:54 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:18:54 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT+CMGF=0^M > 2009-07-19 11:18:54 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:18:54 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT+CSMS=?^M > 2009-07-19 11:18:54 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- +CSMS: (0-1) > 2009-07-19 11:18:54 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:18:54 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> > AT+CNMI=1,2,0,1,0^M > 2009-07-19 11:18:54 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:18:54 [10835] [6] INFO: AT2[/dev/ttyUSB0]: AT SMSC > successfully opened. > 2009-07-19 11:18:56 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT^M > 2009-07-19 11:18:56 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:19:23 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- +CMT: ,26 > 2009-07-19 11:19:23 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- > 07914140540500F8040B912160779992F400009070911191918A07CBB2DB5D26E701 > 2009-07-19 11:19:23 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: received message > from SMSC: +14044550008 > 2009-07-19 11:19:23 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: Numeric sender > (international) <+12067799294> > 2009-07-19 11:19:23 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: User data length > read as (7) > 2009-07-19 11:19:23 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: Udh decoding done > len=7 udhi=0 udhlen=0 udh='' > 2009-07-19 11:19:23 [10835] [18] DEBUG: send_msg: sending msg to box: > <127.0.0.1> > 2009-07-19 11:19:23 [10835] [18] DEBUG: boxc_sender: sent message to > <127.0.0.1> > 2009-07-19 11:19:23 [10835] [17] DEBUG: boxc_receiver: got ack > 2009-07-19 11:19:48 [10835] [17] DEBUG: boxc_receiver: heartbeat with load > value 0 received > 2009-07-19 11:19:58 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT^M > 2009-07-19 11:19:58 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:21:00 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT^M > 2009-07-19 11:21:00 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:22:02 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT^M > 2009-07-19 11:22:02 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:23:04 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT^M > 2009-07-19 11:23:04 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:24:06 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT^M > 2009-07-19 11:24:06 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > 2009-07-19 11:25:08 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: --> AT^M > 2009-07-19 11:25:08 [10835] [6] DEBUG: AT2[/dev/ttyUSB0]: <-- OK > >
