Hello. I've been searching Google and these forums for a while but haven't found an answer. So I'm resorting to posting the question.
I know that multiple I2C devices can share the same pins (A4 and A5) because they have unique addresses. I'm working on a project now using an RTC module on an Uno and it appears that I'm going to be one pin short for what could be either an LED or a button. I'd prefer not to upgrade to a Mega for more pins.
I was wondering if it's possible for an I2C device and a non-I2C device like an LED or a button (which have no unique address) to share a pin and still function properly.