BG96 in PSM current drops from 50mA to 20mA, not 10 uA and still responsive to AT commands

IoT Modules LPWA Module
1

Hi there!

I configure the BG96 to register on the NB1 network and then I enable PSM with T3412 (sleep) set to 10 min, and T3324 (awake) set to 1 min. I have to poll “AT+QPSMS?” for a few seconds before I get a valid indication. When I receive the “+QPSMTIMER: 600,60” URC, the BG96 current drops from 50 mA to 20 mA (not 10 uA). The BG96 also responds to AT commands while it is supposed to be in PSM.

Any tips / hints / help to get the BG96 current down to 10 uA would be much appreciated. Here is the full log:

at+qcfg=“nwscanseq”,03
OK
at+qcfg=“nwscanmode”,3
OK
at+qcfg=“iotopmode”,1
OK
at+qcfg=“band”,0,0,80
OK
at+cfun=1,1
OK

RDY

+CFUN: 1

+CPIN: READY

+QUSIM: 1

+QIND: SMS DONE

APP RDY

ati
Quectel
BG96
Revision: BG96MAR04A03M1G

at+cereg=2
OK
at+cereg?
+CEREG: 2,5,“5209”,“E0B8D17”,9

OK
at+qcsq
+QCSQ: “CAT-NB1”,-79,-90,112,-10

OK
at+qnwinfo
+QNWINFO: “CAT-NB1”,“65501”,“LTE BAND 8”,3596

OK
at+cgatt?
+CGATT: 1

OK
at+qcfg=“psm/urc”,1
OK
at+cpsms=1,“10101010”,“00100001”
OK
at+qpsms?
+QPSMS: 0,

OK
at+qpsms?
+QPSMS: 0,

OK
at+qpsms?
+QPSMS: 0,

OK
at+qpsms?
+QPSMS: 0,

OK
at+qpsms?
+QPSMS: 0,

OK
at+qpsms?
+QPSMS: 0,

OK
at+qpsms?
+QPSMS: 1,“600”,“60”

OK
at+cereg=4
OK
at+cereg?
+CEREG: 4,5,“5209”,“E0B8D17”,9,“00011110”,“10010100”

OK
at+qcfg=“psm/enter”,1
OK

+QPSMTIMER: 600,60

Thanks in advance,
Pieter
https://piconomix.com

2

when you test the power consumption of module ， we need disconnect the peripheral first 。

pls kindly open the below link , that including how to modify EVB HW before your test .

https://cnquectel-my.sharepoint.com/:f:/g/personal/america-fae_quectel_com/EpOFMuh2bX5Co1VFSNtZOXUBdbPoSwgk1kGe3lVyv1jJOg?e=DhaQ9i