Quectel EC200U module QMTOPEN command response issue

IoT Modules LTE Standard Module
1

+QMTOPEN gives response as network connect error while the network is available. Because google ping gives response.
I am not getting how to remove this error.
I am sharing my logs here.
[2022-10-14_10:37:55:348]AT

[2022-10-14_10:37:55:348]OK
[2022-10-14_10:37:56:355]ATI

[2022-10-14_10:37:56:355]Quectel
[2022-10-14_10:37:56:355]EC200U
[2022-10-14_10:37:56:355]Revision: EC200UCNAAR02A10M08

[2022-10-14_10:37:56:355]OK
[2022-10-14_10:37:57:457]AT+CPIN?

[2022-10-14_10:37:57:457]+CPIN: READY

[2022-10-14_10:37:57:457]OK
[2022-10-14_10:37:58:461]AT+CREG?

[2022-10-14_10:37:58:461]+CREG: 0,1

[2022-10-14_10:37:58:461]OK
[2022-10-14_10:37:59:460]AT+CGREG?

[2022-10-14_10:37:59:460]+CGREG: 0,1

[2022-10-14_10:37:59:460]OK
[2022-10-14_10:38:00:460]AT+CSQ

[2022-10-14_10:38:00:460]+CSQ: 21,99

[2022-10-14_10:38:00:460]OK
[2022-10-14_10:38:01:459]AT+COPS?

[2022-10-14_10:38:01:459]+COPS: 0,0,“Airtel”,7

[2022-10-14_10:38:01:459]OK
[2022-10-14_10:38:02:450]AT+QICSGP=1,1,“airtelgprs.com”,“”,“”,0

[2022-10-14_10:38:02:450]OK
[2022-10-14_10:38:03:454]AT+QIACT=1

[2022-10-14_10:38:03:454]OK
[2022-10-14_10:38:04:453]AT+QIACT?

[2022-10-14_10:38:04:453]+QIACT: 1,1,1,“100.77.151.118”

[2022-10-14_10:38:04:453]OK
[2022-10-14_10:38:21:263]AT+QFUPL=“UFS:AmazonRootCA1.pem”,1187,100

[2022-10-14_10:38:21:263]CONNECT
[2022-10-14_10:38:30:150]+QFUPL: 1187,2d19

[2022-10-14_10:38:30:150]OK
[2022-10-14_10:38:42:161]AT+QFUPL=“UFS:client.pem”,1224,100

[2022-10-14_10:38:42:161]CONNECT
[2022-10-14_10:38:53:955]+QFUPL: 1224,6912

[2022-10-14_10:38:53:955]OK
[2022-10-14_10:39:15:350]AT+QFUPL=“UFS:key.pem”,1675,100

[2022-10-14_10:39:15:350]CONNECT
[2022-10-14_10:39:17:159]+QFUPL: 1675,272f

[2022-10-14_10:39:17:159]OK
[2022-10-14_10:40:08:152]AT+QMTCFG=“recv/mode”,0,0,1

[2022-10-14_10:40:08:152]OK
[2022-10-14_10:40:09:155]AT+QMTCFG=“SSL”,1,1,1

[2022-10-14_10:40:09:155]OK
[2022-10-14_10:40:10:158]AT+QSSLCFG=“cacert”,1,“UFS:AmazonRootCA1.pem”

[2022-10-14_10:40:10:158]OK
[2022-10-14_10:40:11:157]AT+QSSLCFG=“clientcert”,1,“UFS:client.pem”

[2022-10-14_10:40:11:157]OK
[2022-10-14_10:40:12:160]AT+QSSLCFG=“clientkey”,1,“UFS:key.pem”

[2022-10-14_10:40:12:160]OK
[2022-10-14_10:40:13:161]AT+QSSLCFG=“seclevel”,1,2

[2022-10-14_10:40:13:161]OK
[2022-10-14_10:40:14:150]AT+QSSLCFG=“sslversion”,1,4

[2022-10-14_10:40:14:150]OK
[2022-10-14_10:40:15:148]AT+QSSLCFG=“ciphersuite”,1,0xFFFF

[2022-10-14_10:40:15:148]OK
[2022-10-14_10:40:16:148]AT+QSSLCFG=“ignorelocaltime”,1,1

[2022-10-14_10:40:16:148]OK
[2022-10-14_10:40:17:159]AT+QMTCFG=“VERSION”,1,4

[2022-10-14_10:40:17:159]OK
[2022-10-14_10:40:27:956]AT+QMTOPEN=1,“a2a2fghrg-ats.iot.us-west-2.amazonaws.com”,8883

[2022-10-14_10:40:27:956]OK
[2022-10-14_10:40:29:757]
[2022-10-14_10:40:29:757]+QMTOPEN: 1,5
[2022-10-14_10:40:37:157]AT+QMTCONN=1,“test”

[2022-10-14_10:40:37:157]ERROR

Please support where is error
2

5 Indicates that the network is disconnected, causing the error
Use QPING to test whether the network is still connected
AT+QPING=1,8.8.8.8

4

Thanks for your reply.
I have perform the PING AT Command. It is running. I am shaing my logs.
But +QMTOPEN error is still same.

Please support to remove error.

Logs:
[2022-10-15_10:35:33:860]AT

[2022-10-15_10:35:33:860]OK
[2022-10-15_10:35:34:861]ATI

[2022-10-15_10:35:34:861]Quectel
[2022-10-15_10:35:34:861]EC200U
[2022-10-15_10:35:34:861]Revision: EC200UCNAAR02A10M08

[2022-10-15_10:35:34:861]OK
[2022-10-15_10:35:35:866]AT+CPIN?

[2022-10-15_10:35:35:866]+CPIN: READY

[2022-10-15_10:35:35:866]OK
[2022-10-15_10:35:36:866]AT+CREG?

[2022-10-15_10:35:36:866]+CREG: 0,1

[2022-10-15_10:35:36:866]OK
[2022-10-15_10:35:37:869]AT+CGREG?

[2022-10-15_10:35:37:869]+CGREG: 0,1

[2022-10-15_10:35:37:869]OK
[2022-10-15_10:35:38:872]AT+CSQ

[2022-10-15_10:35:38:872]+CSQ: 23,99

[2022-10-15_10:35:38:872]OK
[2022-10-15_10:35:39:863]AT+COPS?

[2022-10-15_10:35:39:863]+COPS: 0,0,“Airtel”,7

[2022-10-15_10:35:39:863]OK
[2022-10-15_10:35:40:870]AT+QICSGP=1,1,“airtelgprs.com”,“”,“”,0

[2022-10-15_10:35:40:870]OK
[2022-10-15_10:35:41:872]AT+QIACT=1

[2022-10-15_10:35:41:872]OK
[2022-10-15_10:35:42:863]AT+QIACT?

[2022-10-15_10:35:42:863]+QIACT: 1,1,1,“100.122.160.70”

[2022-10-15_10:35:42:863]OK
[2022-10-15_10:35:43:867]AT+QMTCFG=“recv/mode”,0,0,1

[2022-10-15_10:35:43:867]OK
[2022-10-15_10:35:44:870]AT+QMTCFG=“SSL”,1,1,1

[2022-10-15_10:35:44:870]OK
[2022-10-15_10:35:45:871]AT+QSSLCFG=“cacert”,1,“UFS:AmazonRootCA1.pem”

[2022-10-15_10:35:45:871]OK
[2022-10-15_10:35:46:863]AT+QSSLCFG=“clientcert”,1,“UFS:client.pem”

[2022-10-15_10:35:46:863]OK
[2022-10-15_10:35:47:863]AT+QSSLCFG=“clientkey”,1,“UFS:key.pem”

[2022-10-15_10:35:47:863]OK
[2022-10-15_10:35:48:972]AT+QSSLCFG=“seclevel”,1,2

[2022-10-15_10:35:48:972]OK
[2022-10-15_10:35:49:962]AT+QSSLCFG=“sslversion”,1,4

[2022-10-15_10:35:49:962]OK
[2022-10-15_10:35:50:970]AT+QSSLCFG=“ciphersuite”,1,0xFFFF

[2022-10-15_10:35:50:970]OK
[2022-10-15_10:35:51:972]AT+QSSLCFG=“ignorelocaltime”,1,1

[2022-10-15_10:35:51:972]OK
[2022-10-15_10:35:52:962]AT+QMTCFG=“VERSION”,1,4

[2022-10-15_10:35:52:962]OK
[2022-10-15_10:35:53:963]AT+QMTOPEN=1,“a1a2qg6-ats.iot.us-west-2.amazonaws.com”,8883

[2022-10-15_10:35:53:963]OK
[2022-10-15_10:35:55:372]
[2022-10-15_10:35:55:372]+QMTOPEN: 1,5
[2022-10-15_10:35:58:974]AT+QPING=1,“8.8.8.8”

[2022-10-15_10:35:58:974]OK
[2022-10-15_10:35:59:160]
[2022-10-15_10:35:59:160]+QPING: 0,“8.8.8.8”,64,49,255

[2022-10-15_10:35:59:160]+QPING: 0,“8.8.8.8”,64,30,255

[2022-10-15_10:35:59:160]+QPING: 0,“8.8.8.8”,64,45,255

[2022-10-15_10:35:59:160]+QPING: 0,“8.8.8.8”,64,46,255

[2022-10-15_10:35:59:160]+QPING: 0,4,4,0,30,49,44

5

AT+QIDNSGIP=1,“a1a2qg6-ats.iot.us-west-2.amazonaws.com”

6

Hello Herbert,
I’m facing similar issue wherein I get response code +QMTOPEN: 0,5 when I try to open MQTT connection aws (AT commands are sent on UART via PIC microcontroller).

However, if I’m sending the same set of AT commands using QCOM everything works as expected.

Request you to please support.

7

Hello Karminder,
I’m facing similar issue, were you able to resolve the issue. If yes, could you please let me know the solution.
Thanks in advance.

8

pls add the at command

AT+QSSLCFG=“sni”,1,1