PSM not working BG95-M2

IoT Modules LTE Standard Module
1

Hi,

I managed to get it to work, but I have strange behavior, like the one below. I activate the PSM, the network sends me the parameters, I wait a little, I re-execute the command to access the parameters sent by the network and… nothing. And the module therefore no longer goes into PSM mode.

AT+QPSMS=
OK
AT+QPSMS?
+QPSMS: 0,,,,

OK
AT+QPSMS=1,,,"01111110","00001111"
OK
AT+QPSMS?
+QPSMS: 1,,,"2160","30"

OK
AT+QPSMS?
+QPSMS: 1,,,,

Firmware version :

ATI
Quectel
BG95-M2
Revision: BG95M2LAR02A04
2

What? This is weird. Can you time stamp your AT logs?

3

Sorry for the late answer, I didn’t have my PC with me so I couldn’t do the test.

Here are the results, obviously, I didn’t do anything other than write AT commands :

[18:53:24] AT+QPSMS=
[18:53:25] OK
[18:53:29] AT+QPSMS?
[18:53:29] +QPSMS: 0,,,,

[18:53:29] OK
[18:53:59] AT+QPSMS=1,,,"01111110","00001111"
[18:53:59] OK
[18:54:03] AT+QPSMS?
[18:54:04] +QPSMS: 1,,,"240","120"

[18:54:12] OK
[18:54:22] AT+QPSMS?
[18:54:23] +QPSMS: 1,,,"240","120"

[18:54:23] OK
[18:55:01] AT+QPSMS?
[18:55:02] +QPSMS: 1,,,"240","120"

[18:55:02] OK
[18:55:46] AT+QPSMS?
[18:55:48] +QPSMS: 1,,,"240","120"

[18:55:48] OK
[18:56:18] AT+QPSMS?
[18:56:19] +QPSMS: 1,,,"240","120"

[18:56:19] OK
[18:56:22] AT+QPSMS?
[18:56:22] +QPSMS: 1,,,,

[18:56:22] OK
[18:56:27] AT+QPSMS?
[18:56:28] +QPSMS: 1,,,,

[18:56:28] OK

It seems that after exceeding the T3324 time the module does not go into PSM mode and the parameters are reset.

I’m using an LTE-EVB-B_V1.1 kit with a BG95-M2. I noticed during the test that the “sleep” LED was not on.

4

pls run
AT+QSCLK?
and if it is 0
you should run
AT+QSCLK=1