Spare serial ports ??

[Softfoot]

I have a Pro C with a GT2560 A+.

I want to attach a second serial port to use with a Ethernet to serial gateway.

I intend to leave the USB port for software upgrades/debugging.

The Mega2560 has 4 serial ports, but some of their pins are reused for other purposes.

Dose anyone know if any of the serial port TXx/RXx pins are definitely unused ??

Thanks in advance,
Dave

[William]

Hi,You can view the motherboard schematic in the download-resource on the official website.