I was able to find good documentation about ULPM apis to set the boot source as either timer or gpio pin. It works fine with the sample app where it starts the app send the location in the SMS and switch to low power mode and wakes up on timer. Then don’t do anything.
I have implemented the same interface in out custom app and it works. But I have observed some strange behaviour.
We want to go in low power mode every 10 mins hence set the boot source as 10 mins and switch the mode to ulpm. On timeout of 10 min modules wakes up and does the required task. It works fine for 3- 4 such cycle. But after that it gets stuck probably in the ulpm mode or possibly never wakes up by timer.
When I try to connect it to the IDE I could not see the app in the list any more….the app is not there at all hence it’s not doing anything .
I have tried this with the sample app same thing happens. I tried using GPIO boot up same thing is happening.
Not sure why the app is removed or stuck in low power mode. Is there a restriction on how many times we can switch to ULPM?
If anyone has idea about what I can try or what could be the possible reason for this
I am using
Module : WP8548
Legato version : 16.07.0_cd4985660a55cc9a6f9a2ed28bcc757e_modified
Ultra-Low Power Manager Firmware version : 001.005