hi all, as GPIO03 will auto boot the rpi on connection of neutral, i have also got a 2.5F 5v cap which holds power on isolation for the raspberry to run a safe shutdown, using a diode and GPIO03 pulled up, im able to say when the power is isolated 03 goes high so shutdown.... but now i want to use I2C and the SCL pin is on GPIO03..
can i still use GPIO03 as an input/output as well as using scl? i presume not?
i could use a relay on NC to disconnect GPIO03 from neutral while the rpi is running, while the rpi is off the relay would be closed and neutral would be detected for boot up.. and a different pin for the shutdown could be used... but does anybody know of a way i could still use the same pin for both on and off? i cant re route the SCL as im using a HAT.