FT232 USB to TTL Serial Adapter
FTDI FT232RL-based USB-to-TTL serial adapter with selectable 3.3V/5V logic, 6-pin header, and full modem signals. Essential tool for programming Arduino, ESP8266, and other MCUs.
$6.99
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Specifications
Components
FTDI FT232RL USB-to-serial converter with full modem control signals, up to 3Mbps baud rate, and 3.3V/5V I/O support.
Bus Interfaces
Overview
The FT232 USB to TTL Serial Adapter is an essential tool for embedded developers, providing reliable USB-to-UART conversion based on the genuine FTDI FT232RL chip. It bridges a computer's USB port to a 3.3V or 5V TTL serial interface, enabling firmware uploading, serial debugging, and communication with microcontrollers that lack built-in USB connectivity.
The adapter features a voltage selection jumper for switching between 3.3V and 5V logic levels, making it compatible with a wide range of targets including Arduino Pro Mini, ESP8266 ESP-01, STM32 boards, and bare AVR/ARM chips. The FT232RL supports baud rates up to 3Mbps with automatic hardware flow control (RTS/CTS), and its drivers are widely supported across Windows, macOS, and Linux.
A 6-pin header provides TX, RX, VCC, GND, RTS, and CTS connections. The RTS and DTR signals enable auto-reset for Arduino programming and automatic boot-mode entry for ESP8266/ESP32 flashing via esptool.
Pinout
| Pin | Function |
|---|---|
| VCC | 3.3V or 5V output (selectable) |
| GND | Ground |
| TX | UART Transmit (to target RX) |
| RX | UART Receive (from target TX) |
| RTS | Request to Send (auto-reset) |
| CTS | Clear to Send |
Key Features
- Chip: FTDI FT232RL (genuine)
- Voltage: Selectable 3.3V / 5V logic via jumper
- Baud Rate: Up to 3Mbps
- USB: Mini-USB or Micro-USB connector
- LED Indicators: TX/RX activity LEDs
- OS Support: Windows, macOS, Linux (built-in drivers)
Use Cases
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