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

After setting the input level to 3.3 volts, plugged into a USB port and Windows discovered it immediately. Cant get any easier than that. The serial I/O worked with ease when connected to an extrrnal device using a terminal software.

This flat didn’t work at all. It was a complete waste of time and money!

Made it easy to connect to serial port header of old wifi router, which allowed me to load open-source firmware (dd-wrt) onto it.

Using this to program my Arduino. It looks solidly built, I like that it has a 3.3 and 5V option. While not the cheapest of these serial modules, it looks like a high quality and the couple of extra dollars seem to be worth it. One thing that is really wrong with it is the wire colors. Normally youd have red for positive and black for negative. Because the ribbon cable color scheme does not correspond with the power pins, inserting the cable one way and positive is white and negative is red. Inserting the cable the other way the and positive is orange and negative is green. This is a disaster waiting to happen. Because of the color confusion and the fact that you can put the cable in either way, i deducted 1 star

Worked like a charm to update firmware on a telemetry radio set

Wasted hours trying to use an arduino to flash tosmota on a Sonoff device (had worked before), this worked the first time. The device appears well made and it worked immediately, also no drivers required for Windows 10.

The adapter works well. I used it to program an ESP32-WROOM-32D module via UART. The ability to select voltage is nice.

Very good quality. In my opinion, the build quality of this product is better than the 20 bucks Adafruit one. And it provides 3 voltage configurations, which allows me to debug my 1.8V boards. It comes with female to female jumper wires, no need to buy wires seperately. The only caveat is that I need to purchase a USB extension cord.

This review is for the DSD Tech SH-U09C2. I picked this device up because I didnt have a TTL level adapter for use with embedded device console interfaces or JTAG programming, and wanted to have one around in case I managed to brick one of my routers. The adapter itself is fairly straightforward supporting 5.0v, 3.3v and 1.8v TTL interfaces. The clear case is nice because the device is self-documenting - all of the relevant signals and jumpers are documented on the board. This is good because the included documentation is fairly terse. Then again, if you need one of these adapters you pretty much already know what they are and how to use one so the documentation on the PCB is pretty much all you need. The package also included a loopback jumper for testing adapter operation and a short ribbon cable (about 8in) allowing connection to whatever serial pins are available on the device youre connecting to. There are quite a few additional signals from the FTDI chip that exposed through vias on the PCB that are clearly labeled, but this particular adapter doesnt include attachment pins for them - if needed youd have to open the package and attach pins yourself. The device appears to use a genuine FTDI USB/serial chip - I tried the device using current FTDI VCP drivers on my macbook and the device came right up with no fuss. Ive heard of counterfeit FTDI chips losing chip identifiers when using these drivers, but this device worked just fine for me. The only nit I have is that I picked this one up before I noticed another version of the adapter (slightly more expensive) that included 2.5v and broke out some additional signals. That voltage isnt nearly as common as the voltages this adapter supports, so all in all Im very happy with this device.

Great housing, protects the PC board...excellent!