# HL7812 - KCNX\_IND still missing after +KHTTP\_IND - fw: 5.7.4.0 **URL:** \ **Category:** IoT Modules\ **Tags:** debug\ **Created:** [March 5, 2026, 9:55am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794 "2026-03-05T09:55:03Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![damdam](https://avatars.discourse-cdn.com/v4/letter/d/9dc877/32.png) [@damdam](https://forum.sierrawireless.com/u/damdam)\ **Post date:** [March 5, 2026, 9:55am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/1 "2026-03-05T09:55:03Z")
Hello, I have a problem with missing UCR when I use +KHTTP\_IND command. My modem has the last revision 5.7.4.0 and KCNX\_IND is missing: ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/4/4832c8d0b5ce942e1cc73a93436c38ee6b80eeb4.png) ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/5/5adeb8596bdfee08e4b23012a95eea88d64a0d9f.png) I see on the customer release note of firmware (october 2025) this bug fix: ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/optimized/2X/b/be744c2fa0d2f6b445afd56d0022439185c7d70c_2_690x63.png) May be I’m missing something ? My code works well on HL7802 and I want something compatible. Thanks in advance for help ! ---
**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:** [March 5, 2026, 10:12am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/2 "2026-03-05T10:12:42Z")
the release note says the indication sequence is wrong, but it should show +KHTTP\_IND Do you see any +KCNX\_IND before? Do you see problem in FW 5.7.3? ---
**Author:** ![damdam](https://avatars.discourse-cdn.com/v4/letter/d/9dc877/32.png) [@damdam](https://forum.sierrawireless.com/u/damdam)\ **Post date:** [March 5, 2026, 10:46am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/3 "2026-03-05T10:46:52Z")
Hi, I only have “KHTTP\_IND: 1,1” without any +KCNX\_IND before. With the same code with a HL7802, I have a +KCNX\_IND between “AT+KHTTPCFG=1,“[google.com](http://google.com)”,80” and “+KHTTP\_IND: 1,1” (2026-03-05 09:59:46.148) AT+KHTTPCFG=1,“[google.com](http://google.com)”,80 (2026-03-05 09:59:46.186) (2026-03-05 09:59:46.186) +KHTTPCFG: 1 (2026-03-05 09:59:46.652) (2026-03-05 09:59:46.652) OK (2026-03-05 09:59:46.652) → here is missing +KCNX\_IND (2026-03-05 09:59:46.652) +KHTTP\_IND: 1,1 This bug is annonced has fixed on 5.7.4 If I downgrade to 5.7.3 the bug must be here so I’m not sure to understand your question. ---
**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:** [March 5, 2026, 11:44am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/4 "2026-03-05T11:44:16Z")
i don’t see problem with this firmware 5.7.3: ```auto +CREG: 1,"C672","0188A9DF",9 AT+KCNXCFG=1,"GPRS","nbiot" OK AT+KCNXPROFILE=1 OK AT+KHTTPCFG=1,"www.google.com",80,0,,,,,0 +KHTTPCFG: 1 OK +KCNX_IND: 1,1,0 +KHTTP_IND: 1,1 ati3 HL7812.5.7.3.0 OK ``` ---
**Author:** ![damdam](https://avatars.discourse-cdn.com/v4/letter/d/9dc877/32.png) [@damdam](https://forum.sierrawireless.com/u/damdam)\ **Post date:** [March 5, 2026, 4:21pm UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/5 "2026-03-05T16:21:42Z")
Hi, I downgraded the firmware to 5.7.3.0 and nothing change about my problem. With HL7802 I have KCNX\_IND: ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/a/a8a2c97d03d4114044d37bf219d7f8fed58a48c7.png) With HL7812 I don’t have KCNX\_IND: ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/e/e77100dbc82cdef6062e1e70f667795358b07afa.png) Have you got any clue about this problem ? Regards, ---
**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:** [March 6, 2026, 12:58am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/6 "2026-03-06T00:58:31Z")
Are we using same command sequence? Is this happening to particular module only? ---
**Author:** ![damdam](https://avatars.discourse-cdn.com/v4/letter/d/9dc877/32.png) [@damdam](https://forum.sierrawireless.com/u/damdam)\ **Post date:** [March 9, 2026, 2:03pm UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/7 "2026-03-09T14:03:15Z")
Hi, I’m using only commands on my previous post, no more. Both modems have been powered then I entered commands. Nothing else. I have only 1 modem HL7812. What happen with your modem if you use my sequence ? Regards, ---
**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:** [March 9, 2026, 2:43pm UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/8 "2026-03-09T14:43:29Z")
Have you tried my sequence then? You might also need to contact distributor ---
**Author:** ![damdam](https://avatars.discourse-cdn.com/v4/letter/d/9dc877/32.png) [@damdam](https://forum.sierrawireless.com/u/damdam)\ **Post date:** [March 10, 2026, 9:06am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/9 "2026-03-10T09:06:14Z")
Hi, I did the fimrware upgrade to last version then I try with your configuration without sucess. Now I have an HTTP ERROR 1,5: ```auto (2026-03-10 09:20:17.273) AT+CREG? (2026-03-10 09:20:17.472) AT+CREG? (2026-03-10 09:20:17.472) (2026-03-10 09:20:17.472) +CREG: 0,5 (2026-03-10 09:20:17.472) (2026-03-10 09:20:17.472) OK (2026-03-10 09:20:30.053) AT+KCNXCFG=1,"GPRS","nbiot" (2026-03-10 09:20:30.090) AT+KCNXCFG=1,"GPRS","nbiot" (2026-03-10 09:20:30.253) (2026-03-10 09:20:30.253) OK (2026-03-10 09:20:38.575) AT+KHTTPCFG=1,"www.google.com",80,0,,,,,0 (2026-03-10 09:20:38.629) AT+KHTTPCFG=1,"www.google.com",80,0,,,,,0 (2026-03-10 09:20:38.629) (2026-03-10 09:20:38.629) +KHTTPCFG: 1 (2026-03-10 09:20:38.648) (2026-03-10 09:20:38.648) OK (2026-03-10 09:20:38.648) (2026-03-10 09:20:38.648) +KHTTP_ERROR: 1,5 (2026-03-10 09:21:02.181) ati3 (2026-03-10 09:21:02.220) ati3 (2026-03-10 09:21:02.220) (2026-03-10 09:21:02.220) HL7812.5.7.4.0 (2026-03-10 09:21:02.220) (2026-03-10 09:21:02.220) OK ``` I did another test by adding “http://” before and the modem seems to be KO: ```auto (2026-03-10 09:23:28.957) AT+CREG? (2026-03-10 09:23:29.008) AT+CREG? (2026-03-10 09:23:29.199) (2026-03-10 09:23:29.199) +CREG: 0,5 (2026-03-10 09:23:29.199) (2026-03-10 09:23:29.199) OK (2026-03-10 09:23:49.225) AT+KCNXCFG=1,"GPRS","nbiot" (2026-03-10 09:23:49.260) AT+KCNXCFG=1,"GPRS","nbiot" (2026-03-10 09:23:49.260) (2026-03-10 09:23:49.260) OK (2026-03-10 09:24:06.314) AT+KHTTPCFG=1,"http://www.google.com",80,0,,,,,0 (2026-03-10 09:24:06.352) AT+KHTTPCFG=1,"http://www.google.com",80,0,,,,,0 --> no HTTP answer (2026-03-10 09:30:26.837) AT+CREG? (2026-03-10 09:30:26.903) AT+CREG? (2026-03-10 09:30:26.903) (2026-03-10 09:30:26.903) +CREG: 0,5 (2026-03-10 09:30:26.903) (2026-03-10 09:30:26.903) OK (2026-03-10 09:30:36.090) AT+KHTTPCFG=1,"http://www.google.com",80,0,,,,,0 (2026-03-10 09:30:36.178) AT+KHTTPCFG=1,"http://www.google.co "--> no more answer (2026-03-10 09:31:05.713) ATI3 (2026-03-10 09:37:25.700) ati3 [Error: RX FRAMING ERROR][Error: RX FRAMING ERROR] ``` I have some doubts about the reliability of this modem and its plug-and-play functionality compared to an HL7802 modem. Regards, ---
**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:** [March 10, 2026, 9:12am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/10 "2026-03-10T09:12:06Z")
seems your module is not quite stable… BTW, is “nbiot” the correct APN for your SIM card? ---
**Author:** ![damdam](https://avatars.discourse-cdn.com/v4/letter/d/9dc877/32.png) [@damdam](https://forum.sierrawireless.com/u/damdam)\ **Post date:** [March 10, 2026, 9:27am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/11 "2026-03-10T09:27:02Z")
Hi, Thanks for support. In my case the SIM card can be provided by the final customer so my code chall no depends on it. I tried something else: ```auto (2026-03-10 10:18:58.823) AT+CREG? (2026-03-10 10:18:58.885) AT+CREG? (2026-03-10 10:18:58.885) (2026-03-10 10:18:58.885) +CREG: 0,5 (2026-03-10 10:18:58.885) (2026-03-10 10:18:58.885) OK (2026-03-10 10:19:00.657) AT+KCNXTIMER=1,30,2,60,0 (2026-03-10 10:19:00.730) AT+KCNXTIMER=1,30,2,60,0 (2026-03-10 10:19:00.730) (2026-03-10 10:19:00.730) OK (2026-03-10 10:19:05.013) AT+KHTTPCFG=1,"www.google.com",80,0,,,,,0 (2026-03-10 10:19:05.060) AT+KHTTPCFG=1,"www.google.com",80,0,,,,,0 (2026-03-10 10:19:05.060) (2026-03-10 10:19:05.060) +KHTTPCFG: 1 (2026-03-10 10:19:05.436) (2026-03-10 10:19:05.436) OK (2026-03-10 10:19:05.436) (2026-03-10 10:19:05.436) +KHTTP_IND: 1,1 ``` KCNX is still missiing. If I wait few minutes I have the correct disconnection sequence: ```auto (2026-03-10 10:11:53.114) AT+KHTTPCFG=1,"www.google.com",80 (2026-03-10 10:11:53.185) (2026-03-10 10:11:53.185) +KHTTPCFG: 1 (2026-03-10 10:11:53.514) (2026-03-10 10:11:53.514) OK (2026-03-10 10:11:53.514) (2026-03-10 10:11:53.514) +KHTTP_IND: 1,1 [...] (2026-03-10 10:15:54.468) (2026-03-10 10:15:54.468) +KCNX_IND: 1,5,0 (2026-03-10 10:15:54.468) (2026-03-10 10:15:54.468) +KHTTP_ERROR: 1,5 (2026-03-10 10:15:54.468) (2026-03-10 10:15:54.468) +KHTTP_IND: 1,0 (2026-03-10 10:15:54.676) (2026-03-10 10:15:54.676) +KCNX_IND: 1,3 ``` So the connection sequence seems to have a problem. Regards, ---
**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:** [March 10, 2026, 12:03pm UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/12 "2026-03-10T12:03:56Z")
Does this issue relate to the idle time parameter in +kcnxtimer command? ---
**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:** [March 16, 2026, 4:52am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/13 "2026-03-16T04:52:31Z")
Below is my testing in FW 5.7.4.0, no problem is found. You can see my +KCNXTIMER setting below: ```auto +CREG: 1,"C672","0188A9DF",9 ati3 HL7812.5.7.4.0 OK at+kcnxtimer? OK AT+KCNXCFG=1,"GPRS","nbiot" OK AT+KCNXPROFILE=1 OK AT+KHTTPCFG=1,"www.google.com",80,0,,,,,0 +KHTTPCFG: 1 OK +KCNX_IND: 1,1,0 +KHTTP_IND: 1,1 at+kcnxtimer? +KCNXTIMER: 1,30,2,60,30 OK ``` ---
**Author:** ![damdam](https://avatars.discourse-cdn.com/v4/letter/d/9dc877/32.png) [@damdam](https://forum.sierrawireless.com/u/damdam)\ **Post date:** [March 17, 2026, 8:55am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/14 "2026-03-17T08:55:27Z")
Hi, I andrestood where the difference comes from. In your configuration, you use: AT+KCNXCFG=1,“GPRS”,“nbiot” So it’s not my configuration (see my post #5 - 5 Mar. @ 5.21pm), I don’t use this command. In my configuration, if I’m in Nb-iot or CAT-M1 configuration, I just use AT+KCNXTIMER=1,30,2,60,0 My method works with the HL7802 but it doens’t work with HL7812. The HL7812 is able to connect to “[www.google.com](http://www.google.com)” but if I don’t use the command AT+KCNXCFG=1,“GPRS”,“nbiot” the modem doesn’t respond the righ sequence, KCNX\_IND is missing (but KCNX\_IND is present for the disconnection). My work around is to add the command AT+KCNXCFG=1,“GPRS”,“” in case of CAT-M1 or NB-IOT connection if I’m using the HL7812 modem. Regards, ---
**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:** [March 17, 2026, 9:00am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/15 "2026-03-17T09:00:47Z")
it is quite strange that you don’t need to set APN for the CNX connection. It seems to be more reasonable to specify the APN in +KCNXCFG. You can see the TCP example in AT command user guide, it also specifies the +KCNXCFG: ![image](https://us1.discourse-cdn.com/flex025/uploads/sierrawireless/original/2X/c/c83e6571ce4403dd14530660403772cef79781a7.png) ---
**Author:** ![damdam](https://avatars.discourse-cdn.com/v4/letter/d/9dc877/32.png) [@damdam](https://forum.sierrawireless.com/u/damdam)\ **Post date:** [March 17, 2026, 10:48am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/16 "2026-03-17T10:48:24Z")
Hi, I found is quite stange to have to fill the GPRS APN if we are not using GPRS (in NB-IOT and CAT-M1) Regards, ---
**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:** [March 17, 2026, 11:41am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/17 "2026-03-17T11:41:58Z")
But other than that, how can you set the APN for the CNX connection? ---
**Author:** ![damdam](https://avatars.discourse-cdn.com/v4/letter/d/9dc877/32.png) [@damdam](https://forum.sierrawireless.com/u/damdam)\ **Post date:** [March 19, 2026, 9:07am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/18 "2026-03-19T09:07:11Z")
Hi, When I’m using CAT-M1 or NB-IOT, I don’t have to set any APN for GPRS connection. It works fine with HL7802 but there is a bug with the HL7812. If I’m in NB-IOT or CAT-M1, HL7812 is able to connect to the server (KHTTP\_IND: 1,1) BUT the KCNX\_IND is missing. To have the KCNX\_IND I must add the command: AT+KCNXCFG=1,“GPRS”,“” So I don’t enter any APN, I just put the command to have the missing KCNX\_IND. Regards, ---
**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:** [March 19, 2026, 9:33am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/19 "2026-03-19T09:33:02Z")
will you simply add this command as workaround for your network? In my opinion, empty apn is still an apn configuration ---
**Author:** ![damdam](https://avatars.discourse-cdn.com/v4/letter/d/9dc877/32.png) [@damdam](https://forum.sierrawireless.com/u/damdam)\ **Post date:** [March 19, 2026, 10:10am UTC](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794/20 "2026-03-19T10:10:36Z")
yes, for NB-IOT and CAT-M1 I just add this command as a work around. Without this command the HL7812 can connect to a network but the modem forget to send the KCNX\_IND. So APN is not needed for the connection (the connection HTTP works without this command) [Next page](https://forum.sierrawireless.com/t/hl7812-kcnx-ind-still-missing-after-khttp-ind-fw-5-7-4-0/35794.md?page=2)