Have this small interface FTDI FT232RL to connect a Serial device to the computer via USB.
It has been working well for most of my Serial applications, except today when I tried to use it for a Roboteq controller. While all settings are correct, characters are garbage.
The support tells me the FTDI device use TTL levels (0~3.3/5V) instead of RS232 (-9~+9V). Which seems to be unfortunately correct according to the FTDI doc.
Is there a simple way to have this FTDI device consider RS232 levels, not TTL? (eg like shorting a couple of pins) The Roboteq device doesn't seem to be configurable in this regard.