+QMTOPEN: 0,-1 error

alikemalaldogan · February 19, 2020, 1:52pm

Hello. I have an issue with AT+QMTOPEN command. When I send it I got +QMTOPEN: 0,-1
Here is log below

[2020-02-19_15:43:38]AT

[2020-02-19_15:43:38]OK
[2020-02-19_15:43:40]AT+COPS?

[2020-02-19_15:43:40]+COPS: 0,0,“vodafone TR”,0

[2020-02-19_15:43:40]OK
[2020-02-19_15:43:43]AT+QFLST

[2020-02-19_15:43:43]+QFLST: “cert.pem”,1224
[2020-02-19_15:43:43]+QFLST: “key.pem”,1675
[2020-02-19_15:43:43]+QFLST: “root.pem”,1188

[2020-02-19_15:43:43]OK
[2020-02-19_15:43:46]AT+QMTCFG=“SSL”,0,1,2

[2020-02-19_15:43:46]OK
[2020-02-19_15:43:51]AT+QSSLCFG=“cacert”,2,“root.pem”

[2020-02-19_15:43:51]OK
[2020-02-19_15:43:53]AT+QSSLCFG=“clientcert”,2,“cert.pem”

[2020-02-19_15:43:53]OK
[2020-02-19_15:43:56]AT+QSSLCFG=“clientkey”,2,“key.pem”

[2020-02-19_15:43:56]OK
[2020-02-19_15:43:58]AT+QSSLCFG=“seclevel”,2,2

[2020-02-19_15:43:58]OK
[2020-02-19_15:44:01]AT+QSSLCFG=“sslversion”,2,4

[2020-02-19_15:44:01]OK
[2020-02-19_15:44:03]AT+QSSLCFG=“ciphersuite”,2,0xffff

[2020-02-19_15:44:03]OK
[2020-02-19_15:44:08]AT+QSSLCFG=“ignorelocaltime”,1

[2020-02-19_15:44:08]+QSSLCFG: “ignorelocaltime”,1,1

[2020-02-19_15:44:08]OK
[2020-02-19_15:44:16]AT+QMTOPEN=0,“a2u7s0al75g2nd-ats.iot.us-east-2.amazonaws.com”,8883

[2020-02-19_15:44:16]OK
[2020-02-19_15:44:24]
[2020-02-19_15:44:24]+QMTOPEN: 0,-1

Kyson · February 20, 2020, 1:23am

Dear Sir,
Thanks for your inquiry in Quectel forum.
About your issue, please make sure the MQTT server you used is normal, you can try to change another server to have a try. And, you also can double check whether the certificate you used is correct, and whether the network is normal now. Thanks!

Kyson · February 20, 2020, 5:45am

Dear Sir,
I mean that whether the network of your server is normal, and other client whether can connect to server normally.
The CSQ is not bad, and it is no need to choose the operator. You can try to connect the TCP server to confirm whether the network you used is normal. Thanks!

alikemalaldogan · February 20, 2020, 12:41pm

I couldnt setup even TCP server. It gives me same error. I tried setup new aws certificates. I tried to use QNavigator. Noting fixed my problem. Can you give me full at ommand for mqtt normal or with ssl? Or Do you know any video link about it? Like tell how to set aws pem files. Mine at command set didnt work

Kyson · February 21, 2020, 1:28am

Dear Sir,
Please check the following document about how to test MQTT with SSL. Hopefully it is useful to you. Thanks!
GSM MQTT AT Logs.pdf (51.5 KB)
Please note, it is just an example, the certificate file and the server address should use your’s. Thanks!

alikemalaldogan · February 25, 2020, 9:22am

Should I add \ r at the end of lines?

like this picture before send

Kyson · February 25, 2020, 10:10am

It is better not add such character at the lend of lines. Thanks!

alikemalaldogan · February 25, 2020, 1:54pm

I fixed the problem. Thx. I read these 3 files that in memory. Private_key wasnt correct. One “-” were missing. Thx again for helping.

Kyson · February 26, 2020, 1:25am

Got it. Thanks for your updating. Thanks!

sivanantham · March 2, 2020, 8:58am

Hi alikemalaldogan,
I am also facing the same issue. Did you add \r at the end of line in certificate

Regards
Sivanantham A

alikemalaldogan · March 2, 2020, 11:50am

@sivanantham if you send using with terminal via uart with At commands it, you shouldnt add . if you send from a c code you should add \r. Also check with file commands what you added. When you show text file as hex file you will see \r mean 0x0A. If you need help you can add me linkedn.
Regards
AliKemal

sivanantham · March 3, 2020, 6:04am

Hi alikemalaldogan,

Thank you for your input. I tried with \r on each line for one iteration then \n on each line for 2nd iteration and \r\n on 3rd iteration. But I ended up getting same error. I am able to see the files through FWDL command. I am using EG25G module

alikemalaldogan · March 3, 2020, 6:29am

@sivanantham Do you work with AT commands using with a kind of terminal program? or are you trying to write a code? if you use terminal you cannot change key with add \r\n. Open your key file and try to show them as hex file. You will see 0A datas at the and of the lines. Also try file at commands to read key that you added inside of EG96. Copy keys that response of AT+QFREAD=" "(for BG96) and paste it somewhere which you can see as hex format. They should be %100 equal each other.

sivanantham · March 3, 2020, 6:53am

HI alikemalaldogan,
Thanks for the response.I am writing in C code I will Check and come back on this I was reading the Key files back using AT+QFDWL file and it looks fine

sivanantham · March 4, 2020, 5:02am

HI alikemalaldogan,
Now the issue was resolved. I was sending one of the configuration in other commands. Thanks for your comment to add \r in the certificate

Regards
Sivanantham A

alikemalaldogan · March 4, 2020, 5:15am

No problem. I am happy to help to fix your problem.
AliKemal

Maker_i · March 19, 2020, 5:46am

HI @alikemalaldogan
I’m using the EC25 module.
But… When I tried connecting to Amazon, I also can see return message +QMTOPEN:0-1…

And I use the AT command.

alikemalaldogan · March 19, 2020, 6:01am

Hello @Maker_i
Check certificate and keys inside of module with AT commands.
AT+QFOPEN=filename
AT+QFREAD=filename
And close it with AT+QFCLOSE=filename
these at commands should be true İf I remember it correctly . It should be wrong. You should also check end line things of keys and certificate.

Maker_i · March 19, 2020, 7:02am

I tried the test this AT command, AT+QFDWL=“private.pem.key”
When the download file from aws server and the download file from EC25 module compare ,the end line things is different.

when I upload EC25 the private file using AT command, the end line is 0x0d 0x0a(hex value).

alikemalaldogan · March 19, 2020, 7:33am

Same.

But aws has just 0A. It worked for me.

I took this error too many time when I fixed certificates and keys it is fixed. The others problems I dont know I am sory.