Connecting to server by MQTT and TSL. Information about phases for connection

Hi, people. I get “+QMTOPEN: 0,-1” from server when trying to open. Can i get more information about errors. Can i, for example, get information about - server accepted certificate or not.

My log below. what must i send questions to server owner best? what is directions for this.

AT

OK

ATI

Quectel_Ltd

Quectel_M08R

Revision: M08RMAR01A03

OK

AT+QMTCFG=“VERSION”,0,1

OK

AT+QMTCFG=“SSL”,0,1,2

OK

AT+QSECWRITE=“RAM:cacert.pem”,1360,100

CONNECT

AT

OK

ATI

Quectel_Ltd

Quectel_M08R

Revision: M08RMAR01A03

OK

AT+QMTCFG=“VERSION”,0,1

OK

AT+QMTCFG=“SSL”,0,1,2

OK

AT+QSECWRITE=“RAM:cacert.pem”,1360,100

CONNECT

+QSECWRITE: 1360,4a48

OK

AT+QSECWRITE=“RAM:client.pem”,1809,100

CONNECT

+CPIN: READY

+QSECWRITE: 1809,1643

OK

AT+QSECWRITE=“RAM:userkey.pem”,1729,100

CONNECT

Call Ready

SMS Ready

+QSECWRITE: 1729,647a

OK

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

OK

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

OK

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

OK

AT+QSSLCFG=“seclevel”,2,1

OK

AT+QSSLCFG=“sslversion”,2,3

OK

AT+QSSLCFG=“ignorertctime”,1

OK

AT+QMTOPEN=0,“name.server.net”,8000

OK

+QMTOPEN: 0,-1

… repeated