MC60E problem with MQTT commands [+CME ERROR: 3518]

[SProg]

Hello,

We are having troubles using the MQTT AT commands on MC60E. I am attaching the commands log where you can see the +CME ERROR: 3518.

I cant find any information about this error code.

17/9/2019 12:45:39.02 [RX] - ATE0

OK
AT+CGMR

Revision: MC60ECAR01A05

OK

17/9/2019 12:45:39.63 [RX] - AT

OK
AT+CMEE=1

OK

17/9/2019 12:45:40.22 [RX] - AT+CPIN?

+CPIN: SIM PIN

OK

AT+CPIN=0000

+CPIN: READY

OK

AT+CPIN?

+CPIN: READY

OK

AT+CSDH=0

OK

17/9/2019 12:45:41.86 [RX] - AT+CREG?

+CREG: 0,2

OK

17/9/2019 12:45:42.95 [RX] - AT+CREG?

+CREG: 0,2

OK

17/9/2019 12:45:43.66 [RX] -
Call Ready

17/9/2019 12:45:44.04 [RX] - AT+CREG?

+CREG: 0,1

OK
AT+QICSGP=1,“internet.vodafone.gr”,"",""

OK
AT+QIMUX=0

OK
AT+QHREGPP=“internet.vodafone.gr”,"",""

OK

17/9/2019 12:45:44.80 [RX] - AT+CGATT?

+CGATT: 0

OK

SMS Ready

17/9/2019 12:45:48.49 [RX] - AT+CGATT?

+CGATT: 1

OK
AT+QIACT

OK
AT+QILOCIP

100.107.148.156

17/9/2019 12:47:02.15 [RX] - AT+QMTOPEN=0,“broker.mqttdaboard.com”,8000

OK

17/9/2019 12:47:03.99 [RX] -
+QMTOPEN: 0,4

17/9/2019 12:47:07.05 [RX] - AT+QMTOPEN?

OK

17/9/2019 12:47:10.89 [RX] - AT+QMTCONN=?

+QMTCONN: (0-5),""[,""[,""]]

OK

17/9/2019 12:47:25.73 [RX] - AT+QMTCONN=0,"clientId-magJGAaH"

+CME ERROR: 3518

[Kyson]

Dear Sir,
As you know that the return value of AT+QMTOPEN means that you Failed to parse domain name, so please check whether the MQTT server you used is normal now or try more times, or you can change another server to have a try. Thanks!
By the way, you can set AT+CMEE=2, then it will return the real reason not 3518. Thanks!

[ATHMESH_ANDROID]

Either the port has an issue, or the certificates are not correct.

And the Connection topic should not be blank.

[Soham_Chatterjee]

Actually Im facing the same problem but in a different way

AT+QMTOPEN=0,“mqtt.jet.services.com”,8883

OK

+QGNSSCMD: $PMTK850*3F

+QGNSSCMD: $PMTK850*3F

+QGNSSCMD: $PMTK850*3F

+QGNSSCMD: $PMTK850*3F

+QGNSSCMD: $PMTK850*3F

+QGNSSCMD: $PMTK850*3F

+QGNSSCMD: $PMTK850*3F

+QGNSSCMD: $PMTK850*3F

AT+QMTCONN=0,“MC60_0206”

+CME ERROR: 3518
AT+QMTCONN=0,“M35_0206”

+CME ERROR: 3518
AT+QMTCONN=0

+CME ERROR: 3518
AT+QMTCONN=0,“M95_0206”

+CME ERROR: 3518
AT+QMTCONN=0,“MC60_0206”,“jet-mqtt-broker-user”,“f2eQVVcmGX7ga”

+CME ERROR: 3518

Can anyone help with this defaults? “$PMTK850*3F” and “+CME ERROR: 3518”
I dont undestand why this SSL command not working properly.

[Winnie.Xi-Q]

Hi Soham_Chatterjee:

1. First you should excute the following AT command:
   
   Use AT+QILOCIP to check if you can get Local IP Address.
2. You need to wait for this URC after you excute AT+QMTOPEN:
   
   
   
   If it respond “+QMTOPEN: 0,0” ,then you can excute AT+QMTCONN.
3. If the module can get an IP address but still cannot connect to the MQTT, please use the MQTT.fx tool to verify that the server can connect properly.