Lk is the bootloader
The problematic module is waking up from selective suspend with the gpioCf3SSDemo with GPIO35.
We didn’t test the other module.
So what remains is the missing connection between MCU and the module?
gpioCf3SSDemo → OK for GPIO35 (non-MCU pin), NOK for GPIO38 (MCU pin)
GPIO_CF3_Demo → OK for GPIO35 (non-MCU pin) and OK for GPIO38 (MCU pin)
According to document “How to use GPIO as wakeup source on WP77xx MangOH Red board.docx”, it should be working fine for GPIO36 (MCU pin) in WP7702, so I believe it would work in WP76xx.
Can you have a try on GPIO36 with GPIO_CF3_Demo to make sure the interrupt working fine first?
After that you can have a try on gpioCf3SSDemo with GPIO36 to see if it can wake up module from USB selective suspend mode.
We tested further and the module is waking up with the gpioCf3SSDemo with GPIO38, but only on the other module.
Until this morning. We disconnected the module from power over night and now the problematic module works also - without a sign of what went wrong yesterday or the days before.
I really don’t like this irregular behavior, where the module do different things with the exact same software, but at least it’s working now.
Thanks for the support narrowing it down!