Product Description
This small USBUART adapter converts USB communication into UART (serial) communication, and everything you might need is already on this small board. In addition to the classic UART pins that are arranged in the standard layout: DTR, RXD, TXD, VCC, CTS, GND, other pins available of the CH340 chip are also available on header: RS232, RI, DCD, DSR, RST and CTS. Indication LEDs show activity on RXT and TXD lines, and a 500mA fuse protects this programmer, the USB port of the computer that is connected, and other devices connected to it from damage.
Additionally, there is a voltage regulator and a switch on the board, and it is possible to choose the output voltage of 3.3V or 5V, depending on the device you are using. The logic of the UART signal is always 3.3V, but don’t worry, 5V devices will work with 3V3 UART logic without any problems. Use a USB-C cable to connect.
Product features
Complimentary technical support
In case you ever get stuck with using this product, you can count on us. We provide free, no-strings-attached technical support with this product. Just reach out to us with your questions, and we'll be there to help you.
Open-source
Open-source culture is rooted deep inside us, and that’s reflected in our products. This product follows the open-source principle. It was made with the community’s suggestions and needs in mind. With a modular design, it can be modified to your needs and incorporated into your projects. We provide all the design documentation needed free of charge on our Github repository.
Made in EU
Soldered products, designed and manufactured in Croatia, are thoroughly tested and meet the highest EU standards of quality and safety.
Key features
- USB - UART bridge: CH340
- Input voltage: 5V (USB)
- Output voltage: 3.3V ili 5V, selected using the switch
- UART signal logic level: 3.3V
- USB connector: USB-C
- Power LED and RXD/TXD indication LEDs
- Dimensions: 38 x 22 mm / 1.5 x 0.9 inch
Useful links & tutorials
Pinout drawing 
Open Source Hardware files 
Product datasheet 
CE certificate Customer reviews & ratings
1 reviews
No issues. 3V3/5V switch is a really nice feature, which makes it compatible with most boards (I tested it on ESP32)
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