Maximum time for deep sleep shield

[Roqueton]

Hi folks

I am using a WiPy 2.0 with a deep sleep shield. I have a random problem when the time in the go_to_sleep() method exceeds more or less the 300 seconds (5 min). The device wakes sometimes well and most of times, before the seconds programmed with a remarkable error. Below 300 secs, the wake time is very accurate. Does anyone know if the maximum time is a limitation in deep sleep shield?

Thanks and regards

[BetterAuto]

Did you ever find an answer to this? What is the maximum number of seconds for the go_to_sleep() method?