Hola de nuevo, ya me ha llegado el conversor TTL.
He probado con screen pero me falla:
$ screen /dev/ttyUSB0 115200
[screen is terminating]
Parece que el dispositivo se inicia bien:
$ dmesg
...
[ 338.168202] usb 2-1: new full-speed USB device number 3 using uhci_hcd
[ 338.326541] usb 2-1: New USB device found, idVendor=10c4, idProduct=ea60
[ 338.326549] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 338.326556] usb 2-1: Product: CP2102 USB to UART Bridge Controller
[ 338.326561] usb 2-1: Manufacturer: Silicon Labs
[ 338.326565] usb 2-1: SerialNumber: 0001
[ 338.425605] usbcore: registered new interface driver usbserial
[ 338.425625] USB Serial support registered for generic
[ 338.425687] usbcore: registered new interface driver usbserial_generic
[ 338.425689] usbserial: USB Serial Driver core
[ 338.454969] USB Serial support registered for cp210x
[ 338.455021] cp210x 2-1:1.0: cp210x converter detected
[ 338.564182] usb 2-1: reset full-speed USB device number 3 using uhci_hcd
[ 338.709032] usb 2-1: cp210x converter now attached to ttyUSB0
[ 338.709083] usbcore: registered new interface driver cp210x
[ 338.709088] cp210x: v0.09:Silicon Labs CP210x RS232 serial adaptor driver
Me falta algun paquete por instalar?
Muchas gracias por todo.
Saludos.