the other thing the FTDI chips have going for them is that they have a small amount of NVRAM where the driver stores the COM port assignment. this allows you to set a permanent COM port to a particular adapter. as you might imagine, if you have multiple (identical) USB-serial adapters on the same computer, from boot to boot the USB bus could be enumerated differently, and the COM assignments can get mixed up. debugging that is no fun.
I have to use trendnet tu-s9 usb to serial converter to transmit some commands via RS232. But unfortunately I couldn't see USB-Serial converter as ttyUSB under "/dev/" path. I don't understand the issue as USB detecting under usb list please see the below "lsusb" output
That driver is for use of the Mini-USB port on the newer PLCs. You will need a USB to serial converter (such as this one: -TU-S9-USB-Serial-Converter/dp/B0007T27H8/) and the serial adapter that comes with the older PLCs. I don't have the part number handy for that old serial adapter, but Unitronics (firstname.lastname@example.org) can help you.
Hello guys ,the information here is indeed really useful and i wouldnt have wasted a day looking for drivers , had i known it would work so easily .. However my question is that , I am trying to connect a zigbee through this serial port , so can i directly write /dev/ttyUSB0 instead of the file for the Serial (i.e. /dev/ttyS0or do i need to convert it somehow ? 2b1af7f3a8