Sorry for my English. I use a program for sending SMS. To one computer I have connected more than 100 modems.
When I want to replace the SIM card on the same modem, I'm sending the device to suspend, change SIM card and wakeup the device again.
The modem receives a new command initialization and continues to run, but he gives IMSI of the old SIM card.

AT+CIMI return current IMSI but new files sent/report/incoming is still IMSI of the old SIM card. To get a new IMSI I need to do a restart of the whole service. This no problem for 1-5 modems. At 100+ modems it takes a lot of time on all devices, and causing long delays when sending large number of SMS. Good to have a configurable option - wakeup_read_imsi for this.

Thank you.

Nice to hear that there is one more real heavy user of this software.

Here is a new version for you:

Hidden private text.

I do not yet make it public, but likely soon it will be released, as maintainers of GNU/Linux distributions are preparing to upgrade their repositories.

It has a modem setting:
wakeup_read_imsi = yes

With this setting IMSI is read every time when a modem is initialized. Reading takes only couple of milliseconds, so I was thinking that there is no reason to check if a modem was suspended or not.

I tried this version of the program. Not comfortable displaying messages IMSI in the log with level 5. No need to display it in the log always. Only 1 time upon awakening. Smstools is important to read and remember the new IMSI when the modem returns to sleep mode.

Log on 3.1.16
2017-02-27 10:06:51.988,5, H21P01: SMS received (report, Message_id: 185, Status: 0,Ok,short message received by the SME), From: xxxxx2924328 2017-02-27 10:07:01.162,5, H21P01: SMS sent, Message_id: 199, To: xxxxx6648536, sending time 4 sec. 2017-02-27 10:07:13.660,5, H21P01: SMS received (report, Message_id: 199, Status: 0,Ok,short message received by the SME), From: xxxxx6648536 2017-02-27 10:09:19.728,5, H21P01: SMS received (report, Message_id: 171, Status: 0,Ok,short message received by the SME), From: xxxxx2465318 2017-02-27 10:13:25.328,5, H21P01: SMS received (report, Message_id: 183, Status: 0,Ok,short message received by the SME), From: xxxxx4573173 2017-02-27 10:17:02.749,2, H21P01: Modem handler 0 terminated. PID: 21570, was started 17-02-27 10:04:08, up 12 min. 2017-02-27 10:17:05.475,5, H21P01: Modem handler 0 has started. PID: 28425. 2017-02-27 10:17:05.485,5, H21P01: Serving queues: H21P01 2017-02-27 10:17:05.485,5, H21P01: Using check_memory_method 2: CMGD is used. 2017-02-27 10:17:09.333,5, H21P01: IMEI: 862454569327252 2017-02-27 10:17:09.454,5, H21P01: IMSI: *********034335 2017-02-27 10:35:32.998,5, H21P01: SMS received (report, Message_id: 182, Status: 0,Ok,short message received by the SME), From: xxxxx3100004 2017-02-27 12:07:51.668,5, H21P01: SMS received (report, Message_id: 195, Status: 0,Ok,short message received by the SME), From: xxxxx3302343 2017-02-27 14:14:58.089,5, H21P01: SMS received (report, Message_id: 139, Status: 0,Ok,short message received by the SME), From: xxxxx5030074 2017-02-27 18:35:17.298,5, H21P01: SMS received (report, Message_id: 60, Status: 67,Error,not obtainable), From: xxxxx0061343 2017-02-27 19:01:21.732,5, H21P01: SMS received (report, Message_id: 99, Status: 67,Error,not obtainable), From: xxxxx9555083 2017-02-27 19:03:16.381,5, H21P01: SMS received (report, Message_id: 104, Status: 67,Error,not obtainable), From: xxxxx7611181 2017-02-27 19:07:50.198,5, H21P01: SMS received (report, Message_id: 128, Status: 67,Error,not obtainable), From: xxxxx6220060 2017-02-27 21:39:56.136,5, H21P01: SMS received (report, Message_id: 86, Status: 70,Error,SM validity period expired), From: xxxxx7293181 2017-02-27 21:49:57.830,2, H21P01: Modem handler 0 terminated. PID: 28425, was started 17-02-27 10:17:05, up 11:32.

log on 3.1.18-rc1

2017-02-27 21:56:00.367,5, H21P01: Modem handler 0 has started. PID: 10265. 2017-02-27 21:56:00.368,5, H21P01: Serving queues: H21P01 2017-02-27 21:56:00.368,5, H21P01: Using check_memory_method 2: CMGD is used. 2017-02-27 21:56:04.223,5, H21P01: IMEI: 862454024327252 2017-02-27 21:56:04.344,5, H21P01: IMSI: *********034335 2017-02-27 21:56:10.351,5, H21P01: IMSI: *********034335 2017-02-27 21:56:16.157,5, H21P01: IMSI: *********034335 2017-02-27 21:56:21.963,5, H21P01: IMSI: *********034335 2017-02-27 21:56:27.750,5, H21P01: IMSI: *********034335 2017-02-27 21:56:33.540,5, H21P01: IMSI: *********034335 2017-02-27 21:56:39.347,5, H21P01: IMSI: *********034335 2017-02-27 21:56:45.134,5, H21P01: IMSI: *********034335 2017-02-27 21:56:50.940,5, H21P01: IMSI: *********034335 2017-02-27 21:56:56.747,5, H21P01: IMSI: *********034335 2017-02-27 21:57:02.536,5, H21P01: IMSI: *********034335 2017-02-27 21:57:08.342,5, H21P01: IMSI: *********034335 2017-02-27 21:57:14.148,5, H21P01: IMSI: *********034335 2017-02-27 22:00:43.136,5, H21P01: IMSI: *********034335 2017-02-27 22:00:43.539,5, H21P01: SMS received (report, Message_id: 129, Status: 70,Error,SM validity period expired), From: xxxxx6220060 2017-02-27 22:00:49.905,5, H21P01: IMSI: *********034335 2017-02-27 22:00:55.711,5, H21P01: IMSI: *********034335 2017-02-27 22:01:01.517,5, H21P01: IMSI: *********034335 2017-02-27 22:01:01.922,5, H21P01: SMS received (report, Message_id: 130, Status: 70,Error,SM validity period expired), From: xxxxx6220060 2017-02-27 22:01:08.563,5, H21P01: IMSI: *********034335 2017-02-27 22:01:14.369,5, H21P01: IMSI: *********034335 2017-02-27 22:01:20.175,5, H21P01: IMSI: *********034335 2017-02-27 22:01:20.392,5, H21P01: Suspend started. reload 2017-02-27 22:01:55.398,5, H21P01: Suspend ended. 2017-02-27 22:02:04.125,5, H21P01: IMSI: *********034335 2017-02-27 22:02:04.548,5, H21P01: SMS received (report, Message_id: 150, Status: 70,Error,SM validity period expired), From: xxxxx1633033 2017-02-27 22:02:10.913,5, H21P01: IMSI: *********034335 2017-02-27 22:02:16.719,5, H21P01: IMSI: *********034335 2017-02-27 22:02:22.525,5, H21P01: IMSI: *********034335 2017-02-27 22:02:28.332,5, H21P01: IMSI: *********034335 2017-02-27 22:02:34.138,5, H21P01: IMSI: *********034335 2017-02-27 22:02:39.944,5, H21P01: IMSI: *********034335 2017-02-27 22:02:45.750,5, H21P01: IMSI: *********034335 2017-02-27 22:02:51.556,5, H21P01: IMSI: *********034335 2017-02-27 22:02:57.382,5, H21P01: IMSI: *********034335 2017-02-27 22:03:03.188,5, H21P01: IMSI: *********034335 2017-02-27 22:03:08.994,5, H21P01: IMSI: *********034335 2017-02-27 22:03:14.800,5, H21P01: IMSI: *********034335

to many spam IMSI: *********034335 message


a good log should look like this
2017-02-27 21:56:00.367,5, H21P01: Modem handler 0 has started. PID: 10265. 2017-02-27 21:56:00.368,5, H21P01: Serving queues: H21P01 2017-02-27 21:56:00.368,5, H21P01: Using check_memory_method 2: CMGD is used. 2017-02-27 21:56:04.223,5, H21P01: IMEI: 862454024327252 2017-02-27 21:56:04.344,5, H21P01: IMSI: *********034335 2017-02-27 22:00:43.539,5, H21P01: SMS received (report, Message_id: 129, Status: 70,Error,SM validity period expired), From: xxxxx6220060 2017-02-27 22:01:01.922,5, H21P01: SMS received (report, Message_id: 130, Status: 70,Error,SM validity period expired), From: xxxxx6220060 2017-02-27 22:01:20.392,5, H21P01: Suspend started. reload 2017-02-27 22:01:55.398,5, H21P01: Suspend ended. 2017-02-27 22:02:04.125,5, H21P01: IMEI: 862454024327252 2017-02-27 22:02:04.126,5, H21P01: IMSI: *********034335 2017-02-27 22:02:04.548,5, H21P01: SMS received (report, Message_id: 150, Status: 70,Error,SM validity period expired), From: xxxxx1633033 2017-02-27 22:06:21.005,5, H21P01: SMS received (report, Message_id: 192, Status: 70,Error,SM validity period expired), From: xxxxx3159205

Thanks for your opinion. The package on the private link is now upgraded. It is using the same name as before.

Setting wakeup_read_imsi is removed. There is a setting read_identity_after_suspend which defaults to yes.

Please try the new version, and also any other comments are welcome. 3.1.18 will be released within a next few days.

all is working well. Thank you.

FROM log file
SIM 1
2017-02-28 16:55:41.671,2, H21P01: Modem handler 0 terminated. PID: 28407, was started 17-02-28 11:06:03, up 5:49. 2017-02-28 16:59:17.283,5, H21P01: Modem handler 0 has started. PID: 8347. 2017-02-28 16:59:17.283,5, H21P01: Serving queues: H21P01 2017-02-28 16:59:17.284,5, H21P01: Using check_memory_method 2: CMGD is used. 2017-02-28 16:59:21.135,5, H21P01: IMEI: 862454569327252 2017-02-28 16:59:21.255,5, H21P01: IMSI: *********034335 2017-02-28 16:59:49.415,5, H21P01: Suspend started. reload

replace SIM card to SIM 2
2017-02-28 17:00:59.427,5, H21P01: Suspend ended. 2017-02-28 17:01:03.153,5, H21P01: IMEI: 862454569327252 2017-02-28 17:01:03.274,5, H21P01: IMSI: *********769237 2017-02-28 17:01:57.686,5, H21P01: SMS sent, Message_id: 4, To: ******798031, sending time 9 sec. 2017-02-28 17:03:45.916,5, H21P01: Suspend started. reload

back again SIM 1
2017-02-28 17:04:45.926,5, H21P01: Suspend ended. 2017-02-28 17:04:54.652,5, H21P01: IMEI: 862454569327252 2017-02-28 17:04:54.773,5, H21P01: IMSI: *********034335

Please take a look at the 3.1.18 which is released now.