Is it possible to use attachInterrupt() to the serial RX pin?
I was reading here about attachInterrupt():
Where it says “Photon: All pins with the exception of D0 and A5”, and then when I go here, and look at pin desciption section
RX, Primarily used as UART RX, but can also be used as a digital GPIO or PWM.
TX,Primarily used as UART TX, but can also be used as a digital GPIO or PWM.
But I dont see any pin mapping to use RX/TX. So am I out of luck here ?