BG95M3: Module in PSM MODE

IoT Modules LPWA Module
1

Hello. I am using the BG95M3 with PSM mode enabled. However, I would like to understand this process a bit more.

I send the following commands:

checkATCommand("AT+QCFG=\"psm/urc\",1", "OK", 300);
checkATCommand("AT+QCFG=\"psm/enter\",1", "OK", 300);
checkATCommand("AT+CPSMS=1,,,\"00000100\",\"00001111\"", "OK", 200);
setEIDRX(1, 4, "0000"); // enable, cat-m1, 1.28s or 5.12s

After that, I proceed with the setup for SIM configuration.

However, I would like to know exactly when the BG95 will enter PSM, since I check the +CREG status every 1 second during the setup, and after some time, the module goes to sleep.

2

When AT+QCFG="psm/urc",1 and AT+QCFG="psm/enter",1 are executed at the same time, there will be a possibility that the URC +QPSMTIMER: <TAU_timer>,<T3324_timer> cannot be outputted because the module enters PSM immediately.