MQTT Connecting Problem

Technical Subjects
1

Hello
I need help to solve my problem. In At-Command mode, after Connecting to internet and giving IP, any MQTT At-Command doesn’t work and in serial port returns (+CME ERROR: 100). Please guide me to solve this problem. thank you

2

Serial port COM8 opened
AT

OK
AT+CPIN?

+CPIN: READY

OK
AT+CREG?

+CREG: 0,1

OK
AT+CGREG?

+CGREG: 0,1

OK
AT+QIMODE=0

OK
AT+QICSGP=1,“mcinet”

OK
AT+QIREGAPP

OK
AT+QICSGP?

+QICSGP: 1

OK
AT+QIACT

OK
AT+QILOCIP

21.44.26.101
AT+QMTOPEN=0,“tb-srv.abreman.ir”,“1883”

+CME ERROR: 100
Serial port COM8 closed

Log-file.zip (318 Bytes)

3

hi,bsalmani69:
I recommend that you use mqTT. fx to test whether the MQTT server can be connected properly or if CA authentication is required.
https://quectel123-my.sharepoint.cn/:u:/g/personal/ae-fae_dom_quectel_com_cn/EZeg69wHoXJBudSvdFHQZZsBmqyui9ovctcpt9KTE7SfqA?e=sgH0bR

4

Thanks for your response herbert.pan-Q.
Problem was from my module firmware. with upgrade module firmware, problem solved.