This USB-to-serial converter adds a DB9 RS-232 serial port to your computer via USB. Based on the FTDI FT232RL chip, it delivers true RS-232 voltage levels (approximately ±10V) rather than TTL 5V — ensuring compatibility with older devices like GPS receivers, handheld programmers, and other equipment with DB9 serial ports.

Three built-in LEDs provide at-a-glance status: a power LED confirms the adapter is connected, and RX/TX LEDs help debug your serial connection. FTDI drivers are available for macOS, Linux, and Windows.

Key Features

• FTDI FT232RL Chip – Reliable performance with rock-solid driver support
• True RS-232 Levels – Voltage doubler/inverter for ±10V output (not just 0–5V)
• DB9 Connector – Standard 9-pin serial port for legacy devices
• Status LEDs – Power, RX, and TX indicators for easy debugging
• Cross-Platform – Works with macOS, Linux, and Windows

Ideal For

• Connecting legacy RS-232 devices to modern computers
• GPS receivers, handheld programmers, and industrial equipment
• Serial debugging and communication

Resources

• FTDI VCP Drivers