Having a 5 minute ULPM cycle on a battery powered MangOH Red Rev6 with a WP7607 module. It works properly for a few hours and suddenly it is impossible to enter ULPM. Any suggestions for workaround is greatly appreciated since this is a showstopper for us. (devMode and CF3 USB is not used) Device…

hi issue solved on last release, BR

Hi @Redferne . I’ve also recently experienced this albeit with WP7700 modules on custom boards. Our application is designed to wake-up, do some work for roughly 1 minute, then enter ULPM and sleep for the remainder of the hour. For the most part, this works and can do so for weeks/months but there’…

We did a little more testing with Release 12 (MCU Version: 002.013). It looks like any call to pmtool shutdown (or a write to /sys/module/swimcu_pm/boot_source/enable will enable PSM and thus disallow ULPM. After the request has been made, it is possible to disable PSM through the AT command AT+CPS…

I’ve seen this PSM issue on a WP7702 module here as well. The workaround to forcefully disable PSM using AT+CPSMS=0 seems to work, but maybe it’s just luck. However just now a saw yet another issue with ULPM on a WP7607 (which does not have PSM, using LTE Cat-4 or Cat-1). Application can get stuck w…

I am using a WP7700 with Legato 19.07.1 (from leaf). Device: WP7700 IMEI: xxxx IMEISV: 4 FSN: xxxx Firmware Version: SWI9X06Y_02.32.02.00 c2e98c jenkins 2019/08/30 07:28:21 Bootloader Versi…

Funny thing. I upgraded the WP7607 to R13.2 and rebuilt the system with Legato 19.07.1 and I’m no longer seeing this issue. Happy days!

This all looks promising. I shall upgrade, rebuild, and run some tests. From the WP77xx R12 Release Notes: https://source.sierrawireless.com/resources/airprime/software/release_notes/wp77xx-release-12-customer-release-notes/ Page 9, QTI9X06-208, Update MCU FW to version 002.013: MCU FW Version …

I also can confirm the exact same behaviour as @elliotmr and @Redferne with Release 12 for WP7700 and Legato 19.07.1 from Leaf. PSM is automatically enabled after a call to le_ulpm_ShutDown. The device will not enter ULPM. Disabling PSM via AT command after a request to enter ULPM puts the devi…

hi @raf , could you please check the responses of the following commands AT!POWERMODE? AT! POWERWAKE? before calling le_ulpm_ShutDown() and after calling it, without using at+cpsms command? Best Regards

Hi @plu , Thanks for the response. I used pmtool instead for simplicity. See below. Note: This was peformed after a clean reboot. BEFORE calling pmtool bootOn timer 60; pmtool shutdown at!powermode? !POWERMODE: No request, status=2-Initialized OK at!powerwake? !POWERWAKE: PSM TIMER: 3571200…

Suddenly unable to enter ULPM

Legato Linux distribution (Yocto project)

elliotmr September 20, 2019, 6:59am 3

Also reported here: ULPM fimrware version 002.011 doesn't work for wp77xx

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Suddenly unable to enter ULPM

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