How can I manage power of T30 module ? I suspect that after a few days of inactivity, windows goes to sleep .
Please check Start → Settings → Control Panel → Power → Schemes options. Set all parameters to Never or desired settings.
Useful links:
http://nicolasbesson.blogspot.in/2008/04/power-management-under-window-ce-part.html
https://msdn.microsoft.com/en-us/library/jj919374(v=winembedded.70).aspx