CP2102 USB to TTL Serial Adapter – USB 2.0 to 5Pin UART Converter Module with 3.3V/5V Output, STC Compatible, Includes Jumper Wires – for Arduino, ESP8266, STM32, DIY Projects (10-Pack)

Work good for interface between Cerbo GX USB input to Smart solar VE direct port Need only three wires to connect Tx ,Rx,Ground

This item is as described. Shipping was fast. Quality is great. The 3pack was a good price. I was able to make a USB GPS Dongle with the USB to TTL adapter for my wifi pineapple pager. I used a ATGM336H GPS module and It fit perfectly in the USB sd card reader housing. I want to thank MacGyver for the idea and the Marine Corps for being able to adapt and overcoming this obstacle.

Worked perfectly (Windows). Not much else to say.

Good

I only used one once for a offshoot thing i needed it for but it worked. Hopefully i never need the other 2 but ill have them when i inevitably do.

yep

A+

Great adapter! easy to use and durable.

Product Overview The CP2102 USB to TTL Serial Adapter is a versatile UART converter module designed to facilitate asynchronous serial communication between a PC and various microcontrollers or FPGAs. Featuring a 5-pin output header with selectable 3.3V and 5V logic levels, it serves as a critical bridge for debugging and flashing firmware on devices like the ESP8266, STM32, and Orange Pi. I deployed this specific module for serial console access on an FPGA development board and an Orange Pi single-board computer, both operating at 3.3V logic. Pros and Cons The primary advantage of this adapter is its seamless driver integration; upon connection to a Windows 11 environment, the CP2102 chipset was recognized immediately, establishing a stable COM port without the manual driver "fiddling" often required by cheaper clones. The inclusion of standard 0.1-inch header pins and jumper wires ensures out-of-the-box compatibility with most breadboards and dev board headers. However, the physical form factor presents a notable trade-off. The integrated USB-A male connector means the entire PCB hangs directly off the computer's USB port. While this "dongle" style is highly portable and eliminates the need for an extra USB cable, it creates a bulky profile that can put leverage on the port or block adjacent USB slots on crowded laptops. Performance Analysis In my experience with high-speed serial data, the CP2102 is a robust choice due to its integrated clock and EEPROM, which minimize data jitter. During my testing with the Orange Pi and FPGA, the module maintained a reliable 115200 baud rate without bit errors or buffer overruns. The technical "why" behind its reliability lies in the Silicon Labs chipset's ability to handle voltage regulation internally, ensuring the 3.3V output remains stable even when the host USB bus fluctuates. The 0.1-inch pins provided a secure mechanical connection, which is essential when the module is suspended from a port and subject to the movement of attached jumper wires. Final Verdict This adapter is a dependable workhorse for any hardware developer’s toolkit, particularly for those working across different logic levels. Its plug-and-play performance on modern operating systems makes it superior to older serial converters. For a more ergonomic setup, I recommend using a short USB extension cable to move the module’s bulk away from your computer’s chassis, reducing the risk of mechanical strain on the USB port. I am not an electrical engineer, but I’ve found that double-checking your VCC jumper position before connecting to a 3.3V device is a mandatory step to avoid catastrophic overvoltage.

This was the hard to find piece I needed to reprogram my Le Potato board. Having the loose jumper cable set made the process much easier because it let me connect directly to the correct pins after checking the documentation for the proper layout. The flexibility of the individual leads was exactly what I needed for this type of work. Once everything was connected, I opened the Arduino IDE and installed the CP2102 drivers. After that, the device showed up right away and the rest of the process was handled through the IDE without any issues. The adapter performed as expected for a USB 2 UART and the connection remained stable throughout my testing. This product does what it is supposed to do and does it well. The CP2102 chipset is widely supported, so using the standard drivers made setup simple. The loose pin leads also make it easy to adapt the wiring to whatever hardware you are working with, which is helpful when dealing with different boards or older devices. I recommend this for anyone who wants a reliable and flexible way to interface with hardware. It is a straightforward tool that makes experimenting with devices like the Le Potato much easier.

I put this little adapter to work flashing firmware and doing serial debugging on a mix of boards, including an Arduino, a Wemos D1 Mini, and an STM32 dev kit. It was plug and play on both Windows and Linux, instantly showing up as a serial port without any driver hunting. The CP2102 chipset has been refreshingly stable at a wide range of baud rates, from slow debug sessions up to the higher speeds for flashing, and I haven’t seen any garbled characters or dropped connections. Being able to tap either 3.3 V or 5 V directly has made it easy to jump between older 5 V logic and 3.3 V devices without an extra level shifter. Build quality is solid for the price. The pin labels are clear enough, and having jumper wires in the bag meant I could wire it up right away instead of digging through parts bins. The only hiccup I hit was TX/RX wiring expectations on one ESP8266 board that wanted straight-through instead of crossed, but once I matched pins it just worked. If I had to nitpick, the silkscreen is small and there’s no enclosure, so I’m gentle with the header when moving things around. For a budget-friendly tool, it has been reliable and now lives on my bench full time.

This CP2102 USB UART adapter worked well with several of my devices. I tested it with a human-presence sensor, an Arduino Uno, and an ESP8266 and all connected easily. Once plugged into my PC, it was recognized on Linux and Windows as a Silicon Labs CP210x USB to UART Bridge. No additional drivers were required. It was simply plug and play. It provides both 5V and 3.3V, which is great for powering my projects. The included jumper cables made it easy to find a suitable set for connecting to my dev boards. The jumpers are female on both ends, so if you’re connecting to something like an Arduino Uno, you’ll need cables with male ends. Overall, I’m happy with this adapter and it’s reasonably priced for what you get.

The CP2102 USB to TTL Serial Adapter – USB 2.0 to 5Pin UART Converter Module with 3.3V/5V Output, STC Compatible, Includes Jumper Wires – for Arduino, ESP8266, STM32, DIY Projects (1) seem good quality and well made. There are jumper wires also included as a nice bonus. Great for DIY projects involving TTL RS232 with the ability to use 3 - 5V. I tested these with a max speed of 115200 with no issue. (They are rated for faster but that's as fast as I tried). Please note that the RX pin goes to the TX of your device's UART and the TX on the board goes to the RX of your device's UART. I use Linux Mint and this device was recognized instantly and worked straight away. At the time of this review the price is ~$10 which is reasonable for what you get.