SOS! Disconnecting from MQTT after 4 min

IoT Modules LTE Standard Module
1

after connecting to MQTT when passes sometimes it disconnects and needs reconnection is there any way to fix it?

[2023-07-03_00:40:57:952]at +QMTSUB=0,1,"t164522975789130",2

[2023-07-03_00:40:57:952]OK
[2023-07-03_00:40:58:062]
[2023-07-03_00:40:58:062]+QMTSUB: 0,1,0,2
[2023-07-03_00:43:04:270]
[2023-07-03_00:43:04:270]+QMTSTAT: 0,1
2

find the solution… in my case problem was AT+QMTCONN=<client_idx>,[,[,]]
in this command. the “clientID” must be unique for all devices if you use multiple devices.