[BG96 LTE-M MQTT] can open port, can't connect to the server

[rab]

Hello.
I’m trying to connect to the cloudMQTT server.
I’m able to open port (you can see this on my logcat under).
Modem responds with ERROR when I m trying to connect.
What is wrong?
Please help.

AT

OK

ATE1

OK

AT+CMEE=2

OK

AT+CPIN?

+CPIN: READY

OK
AT+QCFG=“nwscanseq”,02,1

OK

AT+QCFG=“nwscanmode”,3,1

OK

AT+QCFG=“iotopmode”,0,1

OK

AT+QCFG=“band”,0000000F ,80000 ,1

OK

AT+CGDCONT=1,“IP”,“iot1”,

OK

AT+COPS=0

OK

AT+COPS=?

+COPS: (1,“Orange PL”,“Orange”,“26003”,0),(2,“Orange”,“Orange”,“26003”,8),(1,“T-Mobile.pl”,“TM PL”,“26002”,0),(1,“Plus”,“PLUS”,“26001”,0),(1,“Play”,“Play”,“26006”,0),(0,1,2,3,4),(0,1,2)

OK

AT+QNWINFO

+QNWINFO: “CAT-M1”,“26003”,“LTE BAND 20”,6200

OK

AT+CSQ

+CSQ: 17,99

OK
CSQ OK

AT+CREG?

+CREG: 0,1

OK

AT+QMTOPEN=0,“my.hostname.com”,12345

OK
AT+QMTOPEN?

+QMTOPEN: 0,“my.hostname.com”,12345

OK
AT+QMTCONN=0,“rob”,“mYusername”,“mYpassword”

ERROR

[herbert.pan-Q]

hi,rab:
I recommend that you test your MQTT server using the MQTTt.fx tool
mqtt.fx tool:https://quectel123-my.sharepoint.cn/:u:/g/personal/ae-fae_dom_quectel_com_cn/EZeg69wHoXJBudSvdFHQZZsBmqyui9ovctcpt9KTE7SfqA?e=T0vznx

[rab]

Hi Herbert.pan-Q.
Thank you for response.
I can connect and send data to the server using mqtt.fx tool so server works fine.

I wonder if this command is correct:
“AT+QMTOPEN=0,“m20.cloudmqtt.com”,mYportnumber\r\n”
?

[rab]

After 30 seconds modem responds:
+QMTOPEN: 0,4
so it is “Failed to parse domain name”

Also tried in another server but still nothing:
AT+QMTOPEN=1,“liveobjects.orange-business.com”,1883

OK

+QMTOPEN: 1,4

[herbert.pan-Q]

example:AT+QIDNSCFG=0,8.8.8.8,8.8.4.4

[rab]

@herbert.pan-Q

AT+QIDNSCFG

Thanks again for your patient.

As BG96_TCP/IP_Application_Note_V1.2 says
before send this command: AT+QIDNSCFG=…
I need to SEND AT+QIACT first. But before AT+QIACT i need to send AT+QICSGP ? Is this true?

So I sent:
“AT+QICSGP=1,1,“m20.cloudmqtt.com”,“usrname”,“password”,0\r\n”
OK

but when:
AT+QIACT=1
ERROR

[rab]

When I send AT+QMTOPEN=1,“liveobjects.orange-business.com”,1883 after ~15 seconds BG96 returns:

OK

+QMTOPEN: 1,2

and after next ~30 sec
+QMTOPEN: 1,4

[rab]

I also try this:

AT+QMTOPEN=0,“90.84.189.238”,1883
OK
+QMTOPEN: 0,-1

and:
AT+QMTOPEN=0,“90.84.184.31”,1883
OK
+QMTOPEN: 0,-1

[herbert.pan-Q]

What about MQTT.fx? and is SSL secure mode required?

[rab]

I can connect and send data from MQTT.fx to liveobjects.orange-business.com and m20.cloudmqtt.com without any problems.
SSL mode is not required.

[herbert.pan-Q]

hi,rab:
How is your MQTT.FX configured? I have failed all the connections I have tested.

[Anh_Phuc]

You can try check your sim have registor network yet ?

[rab]

Hi, I m sorry for my absence.
The problem was in username…
Correct userame is: “json+device” insted of " json+device". There were one space between quote and “j”.
Thank you for all helpful hints!