CP2102 USB to TTL UART Serial Converter Module

A CP2102 USB to TTL UART Serial Converter Module bridge the gap between a modern computer’s USB port and the serial UART interface that microcontrollers, GPS modules, Bluetooth adapters, and ESP8266 boards use for communication. The computer sends data over USB, and the CP2102 Module translates that into UART TX and RX signals at TTL voltage levels — the 3.3V and 5V logic that most embedded devices expect. Without this conversion, a laptop USB port cannot communicate directly with a microcontroller’s UART pins.

The cp2102 usb to ttl converter uses the CP2102 single-chip USB-to-UART bridge — a widely supported IC with drivers available for Windows and Linux. Most systems enumerate the module as a virtual COM port automatically after driver installation, making it appear as a standard serial port to terminal software and the Arduino IDE. The module exposes both 3.3V and 5V power rails on the 5-pin TTL header alongside TXD, RXD, and GND. The 3.3V pin powers 3.3V devices like ESP8266 and ESP32 modules directly from the USB supply without a separate regulator.

A TXD on this module connects to RXD on the target device, and RXD on this module connects to TXD on the target. Connecting TX-to-TX and RX-to-RX is a common wiring error that produces no communication. The usb to ttl uart converter suits ESP8266 serial flashing, GPS module data reading, and serial terminal communication with embedded hardware. This CP2102 serial converter module for serial communication and UART interface.

Related Product:

• Checkout FT232RL USB to TTL Serial Adapter Module

Feature:

• 3.3V and 5V output rails power target device directly from USB
• 5-pin TTL header exposes all required signals including both voltage rails
• USB Type-A male plug fits any laptop or desktop
• 42 x 15 mm compact body suits tool bag storage and portable field

Technical Specification:

 Applications:

• CP2102 USB to TTL UART Serial Converter Module firmware to ESP8266 and ESP-01 boards
• Reads GPS module NMEA sentence output on serial terminal
• USB to TTL CP2102 module programs AT command configuration
• CP2102 module pinout 3.3V rail powers ESP-01 module during serial flash programming sessions
• USB to TTL serial converter module reads industrial PLC and sensor UART debug output

Package Include:

• 1 x CP2102 USB to TTL UART Serial Converter Module