Have just changed status from shelved to ongoing project.
Zero/negative power drain during standby. Always ready for instant image capture from standby. A single button click commands instant full wake up and image capture without waiting for any bootloader, program loading or other delay. Then before the unit returns to standby mode it autonomously uploads the image via cellular mobile network to remote a file server over mobile internet. Uses very cheap parts including a M590 GSM/GPRS modem running undocumented commands.