Trouble getting 7700 into Power Saving Mode (PSM)

IoT Modules WP Series
1

Using at! commands with my new WP7700 I have had good success getting into ULPM, but PSM doesn’t appear to do anything.
I have powerwake set to use both a timer and gpio36, and both of these work to wake from ULPM.
However at!powermode=2 has no effect.
I had the logread -f running and I have copied it below.
My guess is that there is something (besides selciot=2, which I have done) that I need to do to enable PSM.
Any help is greatly appreciated.
Jim

Here’s that log output. I need to learn how to change the last line from PSM: Supported=0 to something happier.
Thanks!

Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: Received AT command forward request from modem
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: fwdcmd.opcode=11
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: fwdcmd.name=!powermode
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: fwdcmd.ntokens=1
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: ctrCond signalling complete.
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: Recieved ctrCond: p: 0, S:0, nr: 1
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: POWERMODE has been detected
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: AT response Buffer
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: AT Resp-buffer Len 0
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: sending QMI_AT_FWD_RESP_AT_CMD_REQ_V01 message
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: qmi_client_send_msg_sync returned: 0
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: Send response complete.
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: New request processing complete.
Jun 5 20:20:39 swi-mdm9x28-wp user.info swiapp: Waiting for ctrCond
Jun 5 20:20:39 swi-mdm9x28-wp user.warn kernel: [ 534.282271] PSM: Server Healthcheck timerid : 2136631240
Jun 5 20:20:39 swi-mdm9x28-wp user.warn kernel: [ 534.282416] PSM: Supported: 0
Jun 5 20:20:39 swi-mdm9x28-wp user.warn kernel: [ 534.286754] PSM: Client health check timerid : -1246750736
Jun 5 20:20:39 swi-mdm9x28-wp user.warn kernel: [ 534.288503] PSM: Supported: 0

Checking details about the module:
ati3
Manufacturer: Sierra Wireless, Incorporated
Model: WP7700
Revision: SWI9X06Y_02.16.06.00 7605a6 jenkins 2018/06/20 17:56:12
IMEI: 353805090117826
IMEI SV: 2
FSN: W8816360250910
+GCAP: +CGSM

2

Well, some progress:
I found the at command “at+cpsms” which allows me to enable Power Saving Mode.
Now when I try to invoke PSM via the commands by:
at!powerwake=etc to setup timer and gpio triggers, and
at!powermode=2 to enable PSM, I see in the log that PSM: Supported: 1 (where it was 0 before) followed by PSM: Ready req. Time 60/60.

However I still don’t see anything indicating that PSM is actually entered. The device continues to run my app and send data to AirVantage. All LEDs remain functioning as before. These same settings work fine for getting into ULPM via
at!powermode=3

Has anyone out there used the Power Saving Mode instead of ULPM?
If so could you post here the setup commands you use to get into PSM?

Any help would be greatly appreciated.
Jim