FTDI FT232RL USB-to-Serial Module [Product Link] is a breakout board is for the FTDI FT232RL chip.


FTDI FT232RL USB-to-Serial Module
FTDI FT232RL USB-to-Serial Module
  • 6 pin male header
  • Rx-Tx indicating LEDs


This basic breakout board for the FTDI FT232RL USB-to-Serial IC has a 6-pin male header on top, to make is easier to connect to breadboards. This board works with official and cloned Arduino boards. It can also be used for general serial applications.

This board decrease the cost of Arduino development and increases ease of use. The jumper on the back of the board allows the board’s power output and IO level to be configured to either 3.3V or 5V.You can cut the default 5V trace and add a solder jumper to switch to 3.3V.

FTDI FT232RL Module Pin Out
FTDI FT232RL Module Pin Out


The pins labeled BLK and GRN correspond to the wires on the commonly used FTDI cable. The black wire on the FTDI cable is GND, green is DTR. This helps in aligning the module with the Arduino target chip. This board has TX and RX LEDs to help observe and verify the serial traffic, making it better to use than the FTDI cable.

This board brings out the DTR pin, instead of the RTS pin, which allows an Arduino target to auto-reset when a new Sketch is downloaded and so lets a sketch be downloaded without having to hit the reset button on the Arduino. This board auto resets any Arduino board that has the reset pin brought out to a 6-pin connector.

Using with Arduino

Module Pin Arduino Pin
DTR DTR (Reset)
Vcc +5V

Vcc should be connected to +5V. CTS is pulled low to allow the chip to transmit.

For a breadboard Arduino, connect DTR from the module to Reset with a 100nF capacitor and connect a 10k-ohm resistor from Reset on Arduino to +5V.


FTDI Drivers [Link]

Possible Application Areas

This module can be used in applications that require sketches to be uploaded to Arduino boot-loaded ATmega microcontrollers, placed on breadboards.

Did you create a project using this product? Leave details/links below!


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