The FTDI FT232RL USB to TTL Serial Adapter Module provides a reliable USB to UART bridge for connecting a computer to microcontrollers and TTL serial devices. Built around the FTDI FT232RL IC, the module offers a simple, bus powered interface with selectable logic voltage to match 3.3 V and 5 V targets. Key benefits Easy USB connectivity: plug and play with USB hosts, enabling quick PC to microcontroller communication. Dual voltage support: selectable 5 V or 3.3 V logic levels to match a wide range of devices and development boards. Broad driver compatibility: supported by FTDI drivers for Windows, macOS, and Linux, enabling straightforward integration with development environments. Flexible UART interface: standard TTL serial TXD and RXD lines, along with GND and a VCC pin for target power; some versions provide additional handshake lines for flow control or auto reset. Compact, readytouse module: compact PCB form factor designed for breadboards, prototyping, and compact enclosures. Key attributes Functionality: USB to TTL serial adapter using the FT232RL IC for reliable serial communication. Compatibility: works with most 3.3 V and 5 V microcontrollers and development boards that use TTL level serial. Voltage select: onboard mechanism to choose either 5 V or 3.3 V as the target logic supply. Interface: USB connection to host; TTL serial TXD, RXD, GND, and VCC for target power; optional handshake lines on some revisions. Power: bus powered from USB; no external supply required for typical use. Form factor: compact module with standard connections suitable for breadboards and compact projects. Use cases Microcontroller programming and flashing: connect to a PC to upload code or communicate with bootloaders on devices such as Arduino compatible boards and other microcontrollers. Serial debugging and console access: open a serial terminal to monitor and interact with embedded systems, sensors, or modules that expose TTL serial output. Serial interfacing with TTL devices: connect GPS modules, Bluetooth/WiFi modules, sensors, or other peripherals that present TTL level UART interfaces at 3.3 V or 5 V. How to use Set the onboard voltage selector to the target device voltage (3.3 V or 5 V) before connecting. Connect GND to the target ground, TXD to the target RX, and RXD to the target TX. If your project requires automatic reset during programming, use the DTR/RTS lines if provided by your revision; otherwise reset manually as needed. Install the FTDI USB to serial drivers on your computer as required by your operating system (Windows, macOS, or Linux). Notes on compatibility and drivers The FT232RL based adapter is designed to work with standard UART serial communication and is compatible with a broad range of development boards and modules. Driver availability and installation are provided by FTDI and are commonly available for Windows, macOS, and Linux platforms. Ensure correct voltage selection to avoid damage to the target device when connecting to 3.3 V or 5 V TTL inputs. This description reflects the core brand, model, and features of the FTDI FT232RL USB to TTL Serial Adapter Module with 5 V and 3.3 V support, offering clear guidance on functionality, compatibility, and practical use.