La solución fue utilizar socat:
"Socat is a command line based utility that establishes two bidirectional byte streams and transfers data between them. Because the streams can be constructed from
a large set of different types of data sinks and sources (see address types), and because lots of address options may be applied to the streams, socat can be used
for many different purposes."
La linea en cuestión:
joac@pepino ~ $ socat PTY,link=vserial1 PTY,link=vserial2
Despues, desde pyserial, por ejemplo nos conectamos con:
import serial
