Hi,i'm uses amega644P whith arduino and Myght core(from guithub) as a bootloader.The problem is when i uses Software serial library, Rx does'nt work. I try the second serial port on ATMEGA644
and my communication is perfect. I need 3 serial port, so in addition to serial and serial1 i need to define a third serial port with software serial library. Thanks for helping me.