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3.3v UART to CDC USB adapter
USB
Cables and adapters

uUSB/USB-C CDC Serial Adaptor (3.3v)

Sold by 8086 Consultancy

$4.48

No tax for United States [change]
Type of USB connector.
Stock available: 439
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Original Design
This product was designed by 8086 Consultancy. By buying this product you support original hardware creators.

USB Serial Adaptor - with either micro USB or USB-C connector.

Plugs directly onto our Cluster HAT and MMC (SD) HAT to provide serial console access to the Raspberry Pi for quick access.

Using jumper wires it can be used to access the serial on a Raspberry Pi and for Arduino programming (using RTS for reset).

We use through hole connections on both micro USB and female 6 way 0.1" header for a more robust product over the surface mount alone.

Pinout Description
RTS Request to send
RX Receive (connect to remote TX)
TX Transmit (connect to remote RX)
3V 3.3V supply (50mA max)
CTS Clear to send
GND Ground

The following baud rates are supported

Baud rate Miss rate (%)
2,400 0.16
4,800 0.16
9,600 0.04
19,200 0.04
38,400 0.16
57,600 0.16
115,200 0.16
230,400 0.16
460,800 0.79
1,700,000 0.84
2,300,000 0.62
3,400,000 0.84

This board can only be used with systems using 3.3 volts, connecting to those using higher/lower voltages may result in damage.

To enable serial console on a default Raspbian (or Cluster HAT) installation add "enable_uart=1" to your config.txt in the boot partition.

The IC is used in the adapter enumerates as a Communication Device Class (CDC) device which modern (Win10/Linux/Mac OS X) operating systems have built in drivers for.

Links to code and documentation

No additional links provided for this product.

Product HS Code: 847180

Shipping policy

Please ensure your address is full and correct before placing an order and be aware I'm unable to use some shipping methods to PO boxes.

Deliveries to the USA are sent using RoyalMail PDDP (Postal Delivery Duties Paid).

The seller

8086 Consultancy

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Nottinghamshire, ENG, UK
4 orders since Apr 20, 2026
Maker of things mostly for the Raspberry Pi and Arduino world.