DSD TECH SH-U09C2 USB to TTL Adapter Built-in FTDI FT232RL IC for Debugging and Programming

Works fine in Linux. I wanted this for bit-bang mode at various voltages (just set lines high or low, instead of using serial). This works using libftdi / pylibftdi. You only get four lines in/out: TXD (least-significant), RXD, RTS, and CTS. VCC and Ground take up two pins. Keep in mind that to use bit-bang mode, youre need to disable any serial hookup: rmmod ftdi_sio

Works as expected. Decent documentation.

One of the nicest USB<->TTLserial adapters Ive seen. Solid FTDI 245RL silicon and level shifters for 1.8 (!), 3.3, and 5V. Helped me to debug an issue with a development board. Thanks for a great product, DSD TECH. I ordered two more...

I like that it has straps for various voltage levels. It has a clear case with clearly indicated signal lines - very nice. That will come in useful. If you just plug this thing in, it will not do anything. I use other FTDI devices (including some in our designs) and they just work by plugging them in. This one requires their driver, which is fine. After installing the driver, it wants a reset - unusual but ok. I wasnt ready to reset because I was in the middle of an edit and build so wanted to wait until later. The installation then proceeded the system to crash hard, with a blue screen and all the scary trimmings. It basically reset itself in a very rude way. That really irked me. I wasnt ready to reset and to see a blue screen seconds after installation is very disconcerting. After the PC came back up, the device worked. A bit clunky but does work. Save your work and install this thing when youre ready to reset. The price is right.

Works well right out of the box. No issue for Arduino on MacBook Pro to detect the serial port and communicate with the target board. A connector is provided for simple loop-back tests to verify everything works fine. Make sure to connect GND to the target board, otherwise the link is not stable. Dont waste time and money to try other USB-serial adaptors. This one works!

I bought this after my prior (allegedgely 3.3V) serial cable stopped working after being connected to a 3.3V system. This is very nicely made -- its enclosed in a clear enclosure (no worries about stray wires shorting out while tinkering) and lets you select 1.8, 3.3, or 5V out (no 2.5, though DSD has another unit that adds 2.5V as well.) A cable is inclued that connects to the I/O header on the end of the USB adapter that is terminated in 1x1 female header pins -- its about a foot long. While Im not a fan of blinky lights, at least youll know this adapter is working. Ive had no issues working with a Raspberry Pi as a console cable and also programmed a 2.5V arduino-type microcontroller successfully. I use Linux and no drivers were required out of the box, just plug an play.

This is the perfect solution. Perfect amount of features, very rugged and overall a perfect solution. Would buy again if I needed another.

Works great, very well made For those of you looking to program an arduino with this you MUST have a bootloader installed first to use this as a programmer

Real FTDI FT232RL chip. Win 7 instantly recognized it and loaded the driver. Works flawlessly. Love the plastic case.

There are a lot of serial to usb adapters on the market, but I really like this one and have purchased several of them for use at home and at work. The ability to select several different voltages for the interface using a jumper allows you to use the device in various situations. Very nice physical presentation and easy to configure and use. Highly recommended.