EC20 AT+CGACT always return error

IoT Modules LTE Standard Module
1

I am trying to get MQTT working through my module. I am using the quectel evb kit. Sim I use is a postpaid Vodafone 4g Sim. The steps I followed are:

AT+CGDCONT=1,"IP","www"
OK
AT+CGACT?
+CGACT: 1,1
+CGACT: 2,0
+CGACT: 3,0

OK
AT+CGACT=1,0
ERROR
AT+CGACT=1,1
ERROR
AT+CGPADDR=1
+CGPADDR: 1,"10.70.241.33"

OK
AT+QMTCFG="recv/mode",0,0,1
OK
AT+QMTOPEN=0,"<url>",1883
OK

+QMTOPEN: 0,0
AT+QMTCONN=0,"clientExample","id","password"
OK

+QMTCONN: 0,0,0
AT+QMTPUBEX=0,0,0,0,"test/",12
> Hello! World
OK

+QMTPUBEX: 0,0,0

This procedure works although AT+CGACT gives ERROR. As a matter of fact AT+CGACT output OK when I delete the apn AT+CGDCONT=1,"IP","" following the same procedure I am able to send data.

AT+CGDCONT?
+CGDCONT: 1,"IP","","0.0.0.0",0,0,0,0
+CGDCONT: 2,"IP","","0.0.0.0",0,0,0,0
+CGDCONT: 3,"IP","","0.0.0.0",0,0,0,0

OK
AT+QMTOPEN=0,"<URL>",1883
OK

+QMTOPEN: 0,0
AT+QMTCONN=0,"clientExample","id","password"
OK

+QMTCONN: 0,0,0
AT+QMTPUBEX=0,0,0,0,"test/",12
> Hello! World
OK

+QMTPUBEX: 0,0,0

Why does this work even without APN?
Additionally I cannot seem to enable SSL with and without apn :

AT+QMTCFG=“SSL”,0,1,0
ERROR

This all did work during my initial testing but then it stopped and hasn’t worked ever since.

Also is it possible to set the timezone to UTC?

Any help would be appreciated, thank you.

2

Are you sure “www” is the right APN for your SIM?

4

Yes, on further note I am able to send data even without an APN. :roll_eyes:

5

Dear Sir,
For LTE module, after the module register on network successful, it will active an default bearer, that is why you can open MQTT connection successful without set APN.
For the following error information, maybe you can try to use another <sslctx_idx> and check whether there still have such error information. It is better to check the module’s FW version first. Thanks!
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About how to set time to UTC, you can try the following AT command. Thanks!

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