InkyPi on a Pi Zero 2W with a PiSugar3 for power.

[RudyRipDraw]

I am using InkyPi on a PiZero 2W power by a PiSugar3 for power and it RTC.
I have a cron script that runs quarter of the hour and programs the RTC to wake up the PiZero in 15 minutes after the current time and then does a "shutdown". The time between the power up and shutdown allows the InkyPi to update screen and then power off, saving power.

The period of time when the PiZero is powered ranges and drifts between between approximately between 1 and 15 minutes. It all depends on when the PiZero reboots, if it boots close to the quarter of the hour (15 minute chron reboot job), the run time is less, if is boots just after the quarter of the hour, the run time is longer.

Sometimes, the shutdown is in the middle of the screen refresh resulting in a partially refreshed screen. This is clear up on the next boot sequence.

Is there a simple patch that hold off shutdown unitl the InkyPi has finished screen update?

Also thanks for building this project. Is is great fun.