Hi Friends, This is my first post , I'm trying to interface a GSM module with the arduino UNO board. I found that the Tx pin (pin 3) or pin 1 (for hardware serial ) both are loading . Can you guys help me out with this problem? Thnks in Adavance Santu

Tx pin loading for both SoftSeraial and Hardware serial

nickgammon September 21, 2012, 5:54am 2

What GSM module?

... both are loading.

I don't understand what you mean by that.