provides some useful information
from sysinfo import *
level = battery() # from 0 to 7
sig = signal() # signal strength 0-7
width, height = displaypixels() # 176, 208
free_space = drive_free()['C:'] # 'E:' for memcard
imei_num = imei() # can be used as ID
osversion() # (major, minor, build)
swversion() # "V 3.42.1 16-10-03 NHL-10 (c) NMP"