CP2102 Breakout Board
Driver on

CP2102 USB to Serial Converter Hook-Up Guide


The CP2102 Breakout Board is a superb device for embedded methods that require a serial connection to a pc. The board attaches to the USB bus by way of a regular sort B feminine connector, and seems as a regular COM port.

CP2102 Breakout Board

This IC does not require any exterior oscillator, has an on-board voltage regulator, and makes use of reprogrammable inner EEPROM for the system description. The total {hardware} UART has movement management for baud charges from 300bps to 921600bps. This breakout additionally permits you to join the TX/RX pins of your favourite microcontroller or serial software to the RX/TX pins of the breakout, making a easy serial cable alternative.

Required Supplies

You will have the next supplies to finish this hookup information.

Additionally, you will want customary soldering instruments to finish the circuit.

Steered Studying

In case you are not comfy with the next ideas, you must evaluate them earlier than transferring forward with the CP2102 breaout board.

{Hardware} Structure

This breakout offers entry to all 9 serial interface pins in easy-to-use 0.1″ spaced footprints.

UART Interface

The entire serial interface pins are 5V tolerant.

  • TX: Transmits from the board. A.Okay.A. Serial Output
  • RX: Receives into the board. A.Okay.A. Serial Enter
  • DTR: Information Terminal Prepared
  • DSR: Information Set Prepared
  • RTS: Able to Ship
  • CTS: Clear to Ship
  • RI: Ring Indicator
  • DCD: Information Service Detect

These pins are labeled on the underside of the board, as seen right here.

Bottom View

Energy Interface

There are two energy pins accessible on the breakout board. VCC, which is related on to the USB 5V bus. This may present 4.6-5.2V relying on the regulation of the given USB port. If hooked up to a USB 2.Zero port, then this pin can supply as much as 500mA, in keeping with USB 2.Zero specification.

A 3.3V pin can be accessible. This pin connects on to the CP2102’s inner regulator and might solely supply as much as 100mA. This pin is damaged out to the 4-pin fundamental serial connection on the board’s edge.

Board Top View

Driver Set up

You will have to obtain the suitable drivers in your system. Presently, drivers can be found for the next methods:

  • Home windows
  • MacOS
  • Linux
  • Android

You’ll find essentially the most up-to-date drivers in your system right here, from Silicon Labs.

Putting in Home windows USB Drivers

Obtain and unzip the drivers. Plug within the breakout board to your laptop by way of a USB A-to-B cable. Home windows will try to put in the motive force software program, however you might must information it the right driver location of the unzipped information.

If for no matter cause you do not get the choice to decide on the motive force location, you may manually set up the drivers utilizing the next steps.

Navigate to your Machine Supervisor window. You need to see one thing like the next:

Driver Warning

Machine Driver Warning

Which means that the system is functioning, however Home windows does not know tips on how to talk with the board. Proper-click on the CP2102 system.

Update Drivers

A drop-down menu will seem; choose the “Replace Drivers” choice. You’ll then must direct the pc to the placement of the motive force file you beforehand downloaded and unzipped.

As soon as the drivers have been correctly put in, you must see the next in your Machine Supervisor.

COM Port

Be aware: The quantity related to the CP2102 COM port will possible be totally different in your machine. This isn’t an error.

As soon as the breakout board is efficiently put in, you may then connect with the board by way of your favourite terminal program.

{Hardware} Hook-Up

Soldering Connections

Solder header pins to the 4 pins labeled as 3.3V, TXO, RXI and GND on the sting of the board. It’s also possible to use naked wires for this, however for the convenience of attaching and detaching the breakout board from differing methods, male to feminine jumper wires and header pins work nicely for this explicit circuit.

Hooking It All Up

Make the next connections between your CP2102 breakout board and your 3.3V LCD display screen.

**CP2102 Breakout → Serial Enabled LCD **

  • 3.3V → VCC
  • TXO → RX
  • GND → GND


After you have every thing related, plug in your CP2102 board over USB and open up your favourite terminal program. Be sure you have the right settings for the port in your terminal at 9600bps, 8-N-1, and are connecting to the right COM port.

Cool Term Connections

CoolTerm Settings for Serial Communication with CP2102 Breakout

After you have the right settings in your COM port, begin the connection. You need to be capable to sort into your serial monitor in your display screen, and have the values seem on the LCD.

Assets and Going Additional

Going Additional

Now that you have mastered the fundamentals of working with the CP2102 breakout, you may start integrating it into different tasks. You may incorporate this with a single board laptop, or create an easy-to-access sensor monitoring system. Try among the tutorials beneath to spark another concepts.

We might additionally like to get your suggestions on this hookup information and product generally. Tell us what you assume within the feedback!

Further Assets

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