| Feature | Details |
| Chipset | FTDI FT232RL |
| Interface | USB Type-Mini / Type-A (Module dependent) |
| Logic Voltage | Switchable 3.3V or 5V (via Jumper) |
| Communication | UART (RX, TX, RTS, CTS, DTR) |
| Driver Support | Windows, macOS, Linux, Android |
| Baud Rate | 300 bps to 3 Mbps |
Product Description The FT232RL USB to TTL Serial Adapter is widely considered the gold standard for serial communication between a computer and a microcontroller. Unlike cheaper clones, the genuine FTDI chipset offers exceptional stability and universal driver compatibility. This module is essential for programming "Pro Mini" style Arduinos that lack an onboard USB port, as well as for unbricking routers, flashing firmware to ESP8266/ESP32 modules, and debugging industrial serial equipment. It features a convenient jumper to toggle between 3.3V and 5V logic, making it safe for modern low-voltage sensors and older 5V systems alike.
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Key Highlights
Auto-Reset Support (DTR Pin): Features a DTR (Data Terminal Ready) pin which allows the module to automatically trigger a reset on an Arduino, enabling hands-free code uploads without manual timing.
Dual Logic Levels: A physical jumper allows you to switch between 3.3V and 5V power and signal levels, preventing accidental damage to sensitive 3.3V microcontrollers.
Onboard Indicators: Equipped with RX and TX LEDs that flash during data transmission, providing immediate visual feedback for troubleshooting communication issues.
Over-Current Protection: Includes an integrated self-restoring fuse (polyfuse) to protect your computer's USB port from short circuits in your project.
Full UART Handshaking: Provides access to RTS, CTS, and other modem signals for advanced serial protocols beyond simple TX/RX.
Technical Specifications
USB Interface: Full speed USB 2.0
Internal EEPROM: 1024 bit for device ID and product string storage
Operating Temperature: -40°C to +85°C
Dimensions: 36mm x 18mm
Connectors: 6-pin female/male header for TTL, Mini-USB for PC connection
Installation Tip from Robogears When connecting this to your microcontroller, remember the "crossover" rule: TX (Transmit) on the module goes to RX (Receive) on the MCU, and RX on the module goes to TX on the MCU. If your computer does not recognize the device, ensure you have downloaded the official VCP (Virtual COM Port) drivers from the FTDI website. Warning: Always verify the jumper position before connecting; providing 5V logic to a 3.3V ESP8266 can permanently damage the chip.
Note: This product is the FT232RL Adapter Module. A Mini-USB cable is usually required and sold separately. Product images are for illustration purposes only.