# MC7455 - unable to clean status reports at "SR" **URL:** \ **Category:** MC/EM Series\ **Created:** [January 17, 2024, 9:23am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456 "2024-01-17T09:23:45Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![michaeld](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@michaeld](https://forum.sierrawireless.com/u/michaeld)\ **Post date:** [January 17, 2024, 9:23am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/1 "2024-01-17T09:23:46Z")
When the status reports are enabled and they are written into the storage, there is no way for them to be cleared. The capacity of the “SR” memory is probably 30. That means, that after sending 30 SMS messages, the modem is not able to send an SMS message. The memory is cleared only after full reset. We are configuring the reports with “AT+CNMI=1,2,0,1,0”. Example at+cpms=“SR” +CPMS: 10,30,1,2,0,75 OK AT+CMGD=1,4 OK at+cpms=“SR” +CPMS: 10,30,1,2,0,75 OK ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [January 17, 2024, 10:06am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/2 "2024-01-17T10:06:34Z")
my test shows that the “SR” value will not go up after sending SMS ```auto at+cnmi=1,2,0,1,0 OK ati3 Manufacturer: Sierra Wireless, Incorporated Model: MC7455 Revision: SWI9X30C_02.38.00.00 rE3F3E55C03AE94 jenkins 2022/01/13 05:16:00 MEID: 35907206012345 ESN: 12800012345, 80012345 IMEI: 359072060012345 IMEI SV: 22 FSN: LQ530100512345 +GCAP: +CGSM OK at+cpms="SR" +CPMS: 0,30,0,40,0,40 OK at+cmgs="1234567" > asdfqwer +CMGS: 10 OK at+cpms? +CPMS: "SR",0,30,"SM",0,40,"SM",0,40 OK ``` ---
**Author:** ![michaeld](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@michaeld](https://forum.sierrawireless.com/u/michaeld)\ **Post date:** [January 17, 2024, 10:31am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/3 "2024-01-17T10:31:39Z")
In your example the sms is not actually delivered, and obviously you don’t have delivery report. +CDSI: “SR”,14 Is an indication that the report is received and stored. We did not find any configuration of “+CNMI” which allows us to receive “+CDS” notifications without storing them ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [January 17, 2024, 10:32am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/4 "2024-01-17T10:32:49Z")
i can receive the SMS, so it should be delivered ---
**Author:** ![michaeld](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@michaeld](https://forum.sierrawireless.com/u/michaeld)\ **Post date:** [January 17, 2024, 10:37am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/5 "2024-01-17T10:37:04Z")
For our situation to reproduce you should be able to observe +CDSI: “SR”,14 and +CDS unsolicited result codes in the modem serial interface. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [January 17, 2024, 10:40am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/6 "2024-01-17T10:40:25Z")
how to observe this +CDSI? ---
**Author:** ![michaeld](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@michaeld](https://forum.sierrawireless.com/u/michaeld)\ **Post date:** [January 17, 2024, 11:03am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/7 "2024-01-17T11:03:57Z")
In order to receive sms delivery report, we are sending the sms messages in PDU mode and adding delivery request into the PDU. Additionally, “+CNMI” need to be configured. This is the excerpt from our log, I hope it will be clear 1705412535.936 D modem.py:send\_command : /tmp/modem\_04 TX: AT+CMMS=1 1705412535.942 D modem.py:getline : /tmp/modem\_04 RX: OK 1705412535.942 I sender.py:set\_status : /tmp/modem\_04 Changing status READY → TARGET 1705412536.133 D modem.py:getline : /tmp/modem\_02 RX: \> 1705412536.133 D sender.py:store\_sms : 079179520002001121000C91795224467213401002C120 1705412536.159 D modem.py:getline : /tmp/modem\_02 RX: +CMGW: 0 1705412536.160 D modem.py:getline : /tmp/modem\_02 RX: OK 1705412537.333 D modem.py:send\_command : /tmp/modem\_02 TX: AT+CMSS=0 1705412537.437 I sender.py:run : /tmp/modem\_04 Keeping waiting for send event. 1705412537.660 D modem.py:getline : /tmp/modem\_02 RX: +CMSS: 182 1705412537.661 D modem.py:getline : /tmp/modem\_02 RX: OK 1705412537.661 I sender.py:send\_sms\_from\_mem : /tmp/modem\_02 Sent SMS number 182 1705412537.661 I sender.py:run : /tmp/modem\_02 Sending took 0.334 s 1705412537.662 I sender.py:wait\_for\_delivery\_report: /tmp/modem\_02 Waiting for delivery report for 10.0 s… 1705412538.355 D modem.py:getline : /tmp/modem\_02 RX: +CDSI: “SR”,0 ---
**Author:** ![michaeld](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@michaeld](https://forum.sierrawireless.com/u/michaeld)\ **Post date:** [January 17, 2024, 11:48am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/8 "2024-01-17T11:48:45Z")
Here is more convenient reproduction of the issue for SMS in text mode. It is possible to observe the +CMGD command does not affect the status report storage AT+CNMI=1,2,0,1,0 OK at+cpms=“SR” +CPMS: 13,30,1,2,0,75 OK AT+CMGS=“+972525397371” > dd +CMGS: 44 OK +CDS: 6,44,“972525397371”,241,“24/01/17,13:46:12+08”,“24/01/17,13:46:32+08”,0 at+cpms=“SR” +CPMS: 14,30,1,2,0,75 OK at+cmgd=1,4 OK at+cpms=“SR” +CPMS: 14,30,1,2,0,75 OK ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [January 17, 2024, 1:13pm UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/9 "2024-01-17T13:13:16Z")
here is my test on MC7455: ```auto AT+CNMI=1,2,0,1,0 OK at+cmgs="63919599" > asdfasdf +CMGS: 17 OK +CMT: "+85263919599",,"24/01/17,21:11:53+32" asdfasdf at+cpms? +CPMS: "SR",0,30,"SR",1,75,"SM",2,40 OK at+cmgd=1,4 OK at+cpms? +CPMS: "SR",0,30,"SR",0,75,"SM",2,40 OK ``` ---
**Author:** ![michaeld](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@michaeld](https://forum.sierrawireless.com/u/michaeld)\ **Post date:** [January 17, 2024, 3:14pm UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/10 "2024-01-17T15:14:18Z")
In this example you are receiving “+CMT” unsolicited result code, which is actually a report about incoming SMS message. Our problem is with “+CDS” and “+CDSI” result codes, representing SMS status reports. Probably they are behaving differently. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [January 17, 2024, 3:30pm UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/11 "2024-01-17T15:30:28Z")
i cannot generate the “+CDS” and “+CDSI” result codes, any idea? > [@MC7455 - unable to clean status reports at "SR"](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/2): > > my test shows that the “SR” value will not go up after sending SMS at+cnmi=1,2,0,1,0 OK ati3 Manufacturer: Sierra Wireless, Incorporated Model: MC7455 Revision: SWI9X30C\_02.38.00.00 rE3F3E55C03AE94 jenkins 2022/01/13 05:16:00 MEID: 35907206012345 ESN: 12800012345, 80012345 IMEI: 359072060012345 IMEI SV: 22 FSN: LQ530100512345 +GCAP: +CGSM OK at+cpms="SR" +CPMS: 0,30,0,40,0,40 OK at+cmgs="1234567" \> asdfqwer +CMGS: 10 OK at+cpms? +CPMS: "SR",0,30,"SM",0,40,"SM",0,40 OK are you using same FW as mine? ---
**Author:** ![michaeld](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@michaeld](https://forum.sierrawireless.com/u/michaeld)\ **Post date:** [January 18, 2024, 10:10am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/12 "2024-01-18T10:10:48Z")
We are trying to upgrade to 02.38.00.00. Hope it will change something. For your tests - sometimes status report comes after 20-30 seconds, may be you need to wait more. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [January 18, 2024, 3:55pm UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/13 "2024-01-18T15:55:19Z")
I don’t see the notification: ```auto [2024-01-18 23:50:43.843] at!Gstatus? [2024-01-18 23:50:47.180] !GSTATUS: [2024-01-18 23:50:47.180] Current Time: 141 Temperature: 26 [2024-01-18 23:50:47.180] Reset Counter: 1 Mode: ONLINE [2024-01-18 23:50:47.180] System mode: LTE PS state: Attached [2024-01-18 23:50:47.180] LTE band: B3 LTE bw: 20 MHz [2024-01-18 23:50:47.180] LTE Rx chan: 1400 LTE Tx chan: 19400 [2024-01-18 23:50:47.180] LTE CA state: INACTIVE LTE Scell band:B7 [2024-01-18 23:50:47.180] LTE Scell bw:20 MHz LTE Scell chan:3150 [2024-01-18 23:50:47.180] EMM state: Registered Normal Service [2024-01-18 23:50:47.180] RRC state: RRC Connected [2024-01-18 23:50:47.180] IMS reg state: No Srv [2024-01-18 23:50:47.180] [2024-01-18 23:50:47.180] PCC RxM RSSI: -61 RSRP (dBm): -94 [2024-01-18 23:50:47.180] PCC RxD RSSI: -96 RSRP (dBm): -140 [2024-01-18 23:50:47.180] SCC RxM RSSI: -85 RSRP (dBm): -108 [2024-01-18 23:50:47.180] SCC RxD RSSI: -105 RSRP (dBm): -134 [2024-01-18 23:50:47.180] Tx Power: -- TAC: 0652 (1618) [2024-01-18 23:50:47.180] RSRQ (dB): -12.7 Cell ID: 01E5110C (31789324) [2024-01-18 23:50:47.180] SINR (dB): 3.8 [2024-01-18 23:50:47.180] [2024-01-18 23:50:47.180] [2024-01-18 23:50:47.180] OK [2024-01-18 23:50:52.997] AT+CNMI=1,2,0,1,0 [2024-01-18 23:50:53.725] OK [2024-01-18 23:50:54.534] at+cpms? [2024-01-18 23:50:56.106] +CPMS: "SR",0,30,"SR",0,75,"SR",0,75 [2024-01-18 23:50:56.106] [2024-01-18 23:50:56.106] OK [2024-01-18 23:51:38.041] at+cpms? [2024-01-18 23:51:40.113] +CPMS: "SR",0,30,"SR",0,75,"SR",0,75 [2024-01-18 23:51:40.113] [2024-01-18 23:51:40.113] OK [2024-01-18 23:52:19.294] at+cmgs="63919599" [2024-01-18 23:52:22.305] > asdfasdf [2024-01-18 23:52:24.076] [2024-01-18 23:52:24.076] +CMGS: 20 [2024-01-18 23:52:24.076] [2024-01-18 23:52:24.076] OK [2024-01-18 23:52:24.298] [2024-01-18 23:52:24.298] +CMT: "+85263919599",,"24/01/18,23:52:23+32" [2024-01-18 23:52:24.298] asdfasdf [2024-01-18 23:52:28.319] at+cpms? [2024-01-18 23:52:29.801] +CPMS: "SR",0,30,"SR",1,75,"SR",1,75 [2024-01-18 23:52:29.801] [2024-01-18 23:52:29.801] OK [2024-01-18 23:53:51.943] at+cmgd=1,4 [2024-01-18 23:53:54.822] OK [2024-01-18 23:53:55.615] at+cpms? [2024-01-18 23:53:56.892] +CPMS: "SR",0,30,"SR",0,75,"SR",0,75 [2024-01-18 23:53:56.892] [2024-01-18 23:53:56.892] OK ``` ---
**Author:** ![michaeld](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@michaeld](https://forum.sierrawireless.com/u/michaeld)\ **Post date:** [January 19, 2024, 6:24am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/14 "2024-01-19T06:24:26Z")
Hello. We have upgraded to the latest firmware and made more detailed test. Please take a look. Hope it is reproduces in your environment # SMS delivery report minimum example # Connect to modem 4 sudo microcom /dev/ttyUSB29 -s 115200 at+cfun=1,1 OK sudo microcom /dev/ttyUSB29 -s 115200 ate OK ati Manufacturer: Sierra Wireless, Incorporated Model: MC7455 Revision: SWI9X30C\_02.38.00.00 rE3F3E55C03AE94 jenkins 2022/01/13 05:16:00 MEID: 35457251202320 IMEI: 354572512023201 IMEI SV: 22 FSN: LQ231622560310 +GCAP: +CGSM OK # Enable SMS report and Status report and discard old URC (Error!) AT+CNMI=0,2,0,1,0 +CMS ERROR: 303 # Enable SMS report and Status report and flush URC (Error!) AT+CNMI=2,2,0,1,0 +CMS ERROR: 303 # Enable SMS report and Status report and discard new URC when buffer full (No error, but not what we want!) AT+CNMI=1,2,0,1,0 OK # Configure first byte of PDU to enable request of delivery report AT+CSMP=49, +CMS ERROR: 313 AT+CSMP? +CSMP: 49,0,0 # Check SR memory storage (3 slots of 30 were occupied before!) AT+CPMS=“SR” +CPMS: 3,30,1,2,1,2 OK AT+CPMS? +CPMS: “SR”,3,30,“SM”,1,2,“SM”,1,2 OK # Send SMS, receive delivery report in +CDS URC AT+CMGF=1 OK AT+CSCS=“GSM” OK at+cmgs=“+972542642731” > asdasdasd +CMGS: 4 OK +CDS: 6,13,“972542642731”,241,“24/01/18,16:31:06+08”,“24/01/18,16:31:07+08”,0 # Check SR memory storage (4 slots occupied, even after clearing!) AT+CPMS? +CPMS: “SR”,4,30,“SM”,1,2,“SM”,1,2 OK at+cmgd=1,4 OK AT+CPMS? +CPMS: “SR”,4,30,“SM”,1,2,“SM”,1,2 OK # Send 25 more SMS, send the next one at+cmgs=“+972542642731” > 29 slots left, taking the 30th +CMGS: 45 OK +CDS: 6,45,“972542642731”,241,“24/01/18,16:37:44+08”,“24/01/18,16:37:46+08”,0 AT+CPMS? +CPMS: “SR”,30,30,“SM”,1,2,“SM”,1,2 # No more CDS will arrive, because SR all slots are occupied at+cmgs=“+972542642731” > 30 SR slots occupied +CMGS: 46 OK ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [January 19, 2024, 6:37am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/15 "2024-01-19T06:37:37Z")
i don’t see what has been added to generate this notification compared to my log ---
**Author:** ![michaeld](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@michaeld](https://forum.sierrawireless.com/u/michaeld)\ **Post date:** [January 19, 2024, 7:32am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/16 "2024-01-19T07:32:54Z")
For text mode, +CSMP command is required. It returns error on the modem, however it is still enables status report for the text mode sms. Please review my session below. First two sms did not receive the status, however the third did at OK AT+CMGF=1 OK AT+CSCS=“GSM” OK at+cmgs=“+972542642731” > a +CMGS: 74 OK AT+CPMS=“SR” +CPMS: 0,30,1,2,1,2 OK AT+CNMI=1,2,0,1,0 OK at+cmgs=“+972542642731” > b +CMGS: 75 OK AT+CSMP=49, +CMS ERROR: 313 AT+CNMI? +CNMI: 1,2,0,1,0 OK AT+CSMP? +CSMP: 49,0,0 OK at+cmgs=“+972542642731” > c +CMGS: 76 OK +CDS: 6,76,“972542642731”,241,“24/01/19,09:27:30+08”,“24/01/19,09:27:31+08”,0 ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [January 19, 2024, 7:55am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/17 "2024-01-19T07:55:23Z")
no +CDS is observed, could this be related to network operator? ```auto ati3 Manufacturer: Sierra Wireless, Incorporated Model: MC7455 Revision: SWI9X30C_02.38.00.00 rE3F3E55C03AE94 jenkins 2022/01/13 05:16:00 MEID: 35907206012435 ESN: 12800001232, 80001234 IMEI: 359072060012345 IMEI SV: 22 FSN: LQ530100512345 +GCAP: +CGSM OK at+cmgf=1 OK aat OK at+cscs? +CSCS: "IRA" OK at+cscs="GSM" OK at+cpms? +CPMS: "SM",2,40,"SM",2,40,"MT",0,255 OK at+cpms="SR" +CPMS: 0,30,2,40,0,255 OK at+cnmi=1,2,0,1,0 OK at+csmp? +CSMP: ,,0,0 OK at+csmp=49,0,0 OK at+cmgs="1234567" > asdfadf +CMGS: 21 OK at+csmp? +CSMP: 49,0,0,0 OK AT+CSMP=49, OK at+cmgs="1234567" > asdfasdf +CMGS: 22 OK ``` ---
**Author:** ![michaeld](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@michaeld](https://forum.sierrawireless.com/u/michaeld)\ **Post date:** [January 19, 2024, 8:10am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/18 "2024-01-19T08:10:16Z")
May be try with actual phone number and make sure the sms is actually delivered. Otherwise, yes it may be the operator ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [January 19, 2024, 8:12am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/19 "2024-01-19T08:12:35Z")
yes, it is actual phone number and i can receive the sms in my phone, i just modify the log I have tried another SIM with another operator, the result is the same: ```auto at!gstatus? !GSTATUS: Current Time: 52 Temperature: 26 Reset Counter: 1 Mode: ONLINE System mode: LTE PS state: Attached LTE band: B5 LTE bw: 10 MHz LTE Rx chan: 2460 LTE Tx chan: 20460 LTE CA state: NOT ASSIGNED EMM state: Registered Normal Service RRC state: RRC Connected IMS reg state: No Srv PCC RxM RSSI: -59 RSRP (dBm): -86 PCC RxD RSSI: -100 RSRP (dBm): -140 Tx Power: -- TAC: 2775 (10101) RSRQ (dB): -10.8 Cell ID: 016E8A49 (24021577) SINR (dB): 6.8 OK at+csmp? +CSMP: ,,0,0 OK at+cmgf=1 OK at+cscs? +CSCS: "IRA" OK at+cscs="GSM" OK at+cpms="SR" +CPMS: 0,30,39,80,0,75 OK at+cnmi=1,2,0,1,0 OK at+csmp=49,0,0 OK at+cmgs="1234567" > asdfasdf +CMGS: 37 OK at+cpms? +CPMS: "SR",0,30,"SM",39,80,"SR",0,75 OK ``` ---
**Author:** ![michaeld](https://avatars.discourse-cdn.com/v4/letter/m/c37758/32.png) [@michaeld](https://forum.sierrawireless.com/u/michaeld)\ **Post date:** [January 19, 2024, 8:25am UTC](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456/20 "2024-01-19T08:25:47Z")
> [@jyijyi](#): > > `"1234567"` I wonder how “1234567” may be the actual phone number [Next page](https://forum.sierrawireless.com/t/mc7455-unable-to-clean-status-reports-at-sr/31456.md?page=2)