The correct pin to solder pad port pin 9 is RX0, TX1 must have nothing connected. For some weird reason, TX1 is the first pin on the Nano, and RX0 is the second, but RX0 is still the correct pin to solder to. @Stupid Dufus: I have pushed yet some changes for you, can you please try the latest version from the lcd_support branch? BTW, what does the LCD say? Please also test with the LCD disabled (i.e.: Comment out ENABLE_LCD).