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I'm working on getting a pi connected to my wifi network (my first attempt failed). I don't have ethernet access, nor do I have a monitor and keyboard.
When pulling the plug, I'm corrupting the filesystem such that I can't mount it to make edits on my laptop.
Is there a safe way to shut it down? Do I need to use a serial console? I don't want to have to re-image it every time I mess up.
It is possible to connect a pushbutton to Pi to safely shutdown.
I use a button connected to pins 39, 40 in conjunction with the following script when I am without keyboard or ssh access to safely shutdown.
