Then also i am getting 4.5v at both TX & RX pins.all other pins gives me 0v or 250mv.
Weather i need to do anything on the 1K resistor or any other options.
And if i measure voltage at other pins which shows me 200mV ( This pins also set to input mode). How can use RX & TX as a general purpose I/O.
TX & RX as a input pin.