Hydra Serial Port Count

How many usable serial ports does the FEZ Hydra have? Is it 4 or is it 5?

Hydra has 4 “U” (UART) sockets.

On the Hydra description page, there appears to be a socket K “UART+H/S”. Is that a 5th serial port or simply the 4th serial port recycled to have handshaking? (It’s my first foray into Gadgeteer, so the sockets are still a bit of a mystery . . . .)

This can be verified by checking Hydra schematics.

The K on socket 6 is one of the 4 UART ports but with handshaking capabilities. However, handshaking is not yet implemented yet.

Actually handshaking code maybe in there but not tested.

Got it. Thanks!