+QMTOPEN: 0,-1 error

Maxi_Cordoba · July 25, 2020, 11:09pm

Hello, I am testing with a EC25 mini PCIe module and getting similar results with +QMTOPEN: 0,-1 as a response to the command QMTOPEN. I am also using AWS IoT core with SSL setttings and certificates, and our code has been tested with BG96 module working, so there should not be an issue about the certificates.

The firmware version of our module is EC25AFFAR07A08M4G.

Has anybody solved this issue? IS EC25 capable of working with AWS IoT core through MQTT?

This is a Log with the commands we are using.

OK
AT+CPIN?
+CPIN: READY

OK
AT+CREG?
+CREG: 0,1

OK
AT+CEREG?
+CEREG: 0,1

OK
AT+QNWINFO
+QNWINFO: “FDD LTE”,“310260”,“LTE BAND 2”,775

OK
AT+QCSQ
+QCSQ: “LTE”,50,-78,188,-14

OK
AT+GSN
866834041644845

OK
AT+COPS?
+COPS: 0,0,“T-Mobile”,7

OK
AT+GMR
EC25AFFAR07A08M4G

OK
AT+QICSGP=1
+QICSGP: 1,“fast.t-mobile.com”,"","",0

OK
Performing AWS Provisioning
AT+QFDEL="*"
OK
AT+QFUPL=“RAM:cacert.pem”,1188,100
CONNECT
+QFUPL: 1188,2d13

OK
AT+QFUPL=“RAM:user_key.pem”,1679,100
CONNECT
+QFUPL: 1679,4b38

OK
AT+QFUPL=“RAM:client.pem”,1220,100
CONNECT
+QFUPL: 1220,3500

OK
AT+QIACT?
OK
AT+QIACT=1
OK
AT+QMTCFG=“SSL”,0,1,2
OK
AT+QSSLCFG=“clientcert”,2,“RAM:client.pem”
OK
AT+QSSLCFG=“clientkey”,2,“RAM:user_key.pem”
OK
AT+QSSLCFG=“cacert”,2,“RAM:cacert.pem”
OK
AT+QSSLCFG=“seclevel”,2,2
OK
AT+QSSLCFG=“sslversion”,2,4
OK
AT+QSSLCFG=“ciphersuite”,2,0xFFFF
OK
AT+QSSLCFG=“ignorelocaltime”,2,1
OK
AT+QMTOPEN?
OK
AT+QMTOPEN=0,“a1gfgsfcsg3p4-ats.iot.us-east-1.amazonaws.com”,8883
OK

+QMTOPEN: 0,-1

Regards

nero · September 17, 2020, 3:06am

Hi, I also meet this issue. I write in C code. And I turn the certificate into hex file, and add \r to end of each line, fail. Then \r\n, then \n, all fail. So how do you fix this?

sivanantham · September 17, 2020, 3:45am

Open your aws certificates in Notepadd++. and choose the format windows(CR LF) from the right side down. Then check the length displayed in the Notepad++. This should match with the numbers of characters you have written in your code

nero · September 17, 2020, 4:38am

Is this format right? Each and of line shoud be /r/n(CRLF)? Or just /r(CR)?Or just /n(LF)

nero · September 17, 2020, 4:57am

I put them into a cha buffer. Here is my log, I think the length is same with what you said in this issue.
[12:23:24.873]收←◆AT+QMTCFG=“SSL”,0,1,2
OK

[12:23:27.837]收←◆AT+QMTCFG=“version”,0,4
OK

[12:23:30.801]收←◆AT+QFUPL=“ufs:cacert.pem”,1208,100
CONNECT

ready to write

[12:23:31.902]收←◆Write CA!

[12:23:36.797]收←◆+QFUPL: 1208,5769

OK

[12:23:39.760]收←◆AT+QFUPL=“ufs:clientcert.pem”,1244,100
CONNECT

ready to write

[12:23:40.868]收←◆Write certificate!

[12:23:45.761]收←◆+QFUPL: 1244,771c

OK

[12:23:48.724]收←◆AT+QFUPL=“ufs:clientkey.pem”,1702,100
CONNECT

ready to write

[12:23:49.871]收←◆Write private key!

[12:23:54.765]收←◆+QFUPL: 1702,2f24

OK

[12:23:57.730]收←◆AT+QSSLCFG=“cacert”,2,“ufs:cacert.pem”
OK

[12:24:00.694]收←◆AT+QSSLCFG=“clientcert”,2,“ufs:clientcert.pem”
OK

[12:24:03.657]收←◆AT+QSSLCFG=“clientkey”,2,“ufs:clientkey.pem”
OK

[12:24:06.621]收←◆AT+QSSLCFG=“seclevel”,2,2
OK

[12:24:09.585]收←◆AT+QSSLCFG=“sslversion”,2,4
OK

[12:24:12.548]收←◆AT+QSSLCFG=“ciphersuite”,2,0XFFFF
OK

[12:24:15.511]收←◆AT+QSSLCFG=“ignorelocaltime”,2,1
OK

[12:24:21.414]收←◆AT+QMTOPEN=2,"a2q1awzao9n7sa-ats.iot.cn-northwest-1.amazonaws.c
+QMTOPEN: 2,0

[12:24:26.378]收←◆AT+QMTCONN=2,“Rak_Wisblock_Mqtt”
OK

+QMTSTAT: 2,1

sivanantham · September 17, 2020, 5:24am

HI,
The Certificates size is ok. What is the hex value of CR and LF. it should be 0D and 0A.

WizIO · September 17, 2020, 5:28am

if format is wrong the module will, return error
Can work only with /n

nero · September 17, 2020, 5:29am

Right，CR and LF in the ASCII is 0x0D 0x0A. I put them in the a buffer, end of each line. But now I stuck here after

AT+QMTOPEN=2,"a2q1awzao9n7sa-ats.iot.cn-northwest-1.amazonaws.c
+QMTOPEN: 2,0

AT+QMTCONN=2,“Rak_Wisblock_Mqtt”
OK

+QMTSTAT: 2,1

rahul.mahakalkar · September 17, 2020, 5:32am

hi…
please download the example code for MQTT with SSL from below link.
https://cnquectel-my.sharepoint.com/:u:/g/personal/india-fae_quectel_com/EQDRByaRx8pNvcsYbDY29ywBJdEibOlptCcTc0vRvgFgXQ?e=geR2Bw

Regards
Rahul

sivanantham · September 17, 2020, 5:54am

The connection seems to be closed by aws. Might be a client ID name issue or some policy issues with this ID. Check the aws configurations and ensure everything is right there

rahul.mahakalkar · December 1, 2020, 5:15am

Hi All
Please find the below working AT logs for AWS SSL for EC2X. Hope so will help.

ATE1

OK
AT+CGREG?

+CGREG: 0,1

OK

+QIND: PB DONE
AT+COPS?

+COPS: 0,0,“IND airtel airtel”,0

OK
AT+QICSGP=1,1,“airtelgprs.com”,“”,“”,1

OK
AT+QIACT=1

OK
AT+QIACT?

+QIACT: 1,1,1,“100.94.195.55”

OK
AT+QFUPL=“RAM:cacert.pem”,1206,100

CONNECT
+QFUPL: 1206,5a63

OK
AT+QFUPL=“RAM:clientcert.pem”,1220,100

CONNECT
+QFUPL: 1220,6118

OK
AT+QFUPL=“RAM:clientkey.pem”,1675,100

CONNECT
+QFUPL: 1675,1612

OK
AT+QMTCFG=“SSL”,0,1,2

OK
AT+QMTCFG=“recv/mode”,0,0,1

OK
AT+QSSLCFG=“cacert”,2,“RAM:cacert.pem”

OK
AT+QSSLCFG=“clientcert”,2,“RAM:clientcert.pem”

OK
AT+QSSLCFG=“clientkey”,2,“RAM:clientkey.pem”

OK
AT+QSSLCFG=“seclevel”,2,2

OK
AT+QSSLCFG=“sslversion”,2,4

OK
AT+QSSLCFG=“ciphersuite”,2,0xFFFF

OK
AT+QSSLCFG=“ignorelocaltime”,2,1

OK
AT+QSSLCFG=“ignoremulticertchainverify”,2,1

OK
AT+QMTOPEN=0,“a1twhjugwcsoyn-ats.iot.us-west-2.amazonaws.com”,8883

OK

+QMTOPEN: 0,0
AT+QMTCONN=0,“clientexample”

OK

+QMTCONN: 0,0,0
AT+QMTPUB=0,1,1,0,“test/topic”

this is the test

OK

+QMTPUB: 0,1,0

Azael_Hernandez · January 28, 2021, 7:32pm

Hi Maker!, I’m getting the +QMTOPEN: 0,1 error in the bg96, How did you get rid of it? I’ve tried many different things but don’t work. , I think it’s something when storing the certificates but I can not figure it out. These are the Commands I used:
QMTOPEN- 0,-1.pdf (18.0 KB)

Ratan · March 2, 2021, 2:56pm

Hi Azael ,

Please try your MQTT with MQTT.fx or some other application to check if your broaker is working fine .
If that is working then you can follow up example provided in BG96 MQTT application note .

Ahamed_Fayaz · May 11, 2021, 4:36pm

How did you read the three files from memory?
You count last \r or not.

Winnie.Xi-Q · May 12, 2021, 7:09am

Hi，
If your file are stored in UFS,you can use the following command to query:
AT+QFLST=“UFS:*”

Devesh_Pareek · April 15, 2024, 9:57am

Hii there, I am facing the same issue as yours while connecting my modem. I am using terminal to add my certificate files on modem. Can anyone guide me on how I should do it. I tried with \r\n, \r and \n, but nothing is working for me.
Also, I have generated certificates using OpenSSL, they are working fine when i try to establish connection with MQTTx, but I am facing problem while using them with GSM modem.