Rvfm usb to serial ttl ftdi cable rvfm usbserialttl this cable is a usb to serial ttl level converter cable identical functionally to the ftdi cable it is one of the easiest ways to connect a ttl interface device to usb and fits directly to many boards br br the cable uses ftdi s ft232r chip which is powerful and well documented the device is housed inside the usb a connector and is terminated at the end of a 1 8m cable with a 0 1 pitch header socket which provides access to tran