I am using m66 module with Microcontroller connecting to AWS iot core, and im able to open MQTT port as im getting
ATI
[2022-12-06_21:51:03:772]
[2022-12-06_21:51:03:772]Quectel_Ltd
[2022-12-06_21:51:03:772]Quectel_M66
[2022-12-06_21:51:03:772]Revision: M66FBR03A07
[2022-12-06_21:51:03:772]OK
AT+QMTOPEN=1,“xxxxxxxxxxxxxx-xxx.xxx.xx-xxxx-x.amazonaws.com”,8883
[2022-12-04_17:59:46:159]+QMTOPEN: 1,0
AT+QMTCONN=1,“xxx”
[2022-12-04_17:59:59:603]OK
[2022-12-04_18:00:04:621]
[2022-12-04_18:00:04:621]+QMTSTAT: 1,3
[2022-12-04_18:00:04:621]+QMTCONN: 1,2
[2022-12-04_18:00:04:621]ÿ
after that if i put AT+QMTPUB or AT+QMTSUB, I am getting same error as +CME ERROR: invalid parameter
please provide example so i can proceed further