ahoy!, this is awesome - https://shop.pimoroni.com/collections/raspberry-pi/products/onoff-shim
and i want to use it for my solar powered radio which i am using the adafruit powerboost 500 basic to also initiate shutdown when the PIN 4 is pulled low.
BAT but when the charger detects a low voltage (under 3.2V) the pin will drop down to 0V. You can use this to signal when its time to shut down or alert the user that the battery is low.
in your info you state the following
We’ve put together a one-line-installer to install the clean shutdown daemon. It watches the state of BCM pin 17 and, when pulled low (pressed), it initiates a clean shutdown. Last thing, just before your Pi shuts down, BCM pin 4 is pulled low to completely cut power to your Pi.
can i use the same pin in conjunction with this OnOff-shim ?