| Feature | Details |
| Main Chipset | Silicon Labs CP2102 |
| Communication | USB 2.0 to UART TTL |
| Output Voltage | Dual 3.3V and 5V DC |
| Baud Rate Range | 300 bps to 1 Mbps |
| Pinout | 6-Pin (DTR, RXD, TXD, VCC, GND, 3V3) |
| Protection | Onboard Resettable Fuse (500mA) |
Product Description The CP2102 USB to UART TTL Module is a high-performance, industrial-grade serial converter known for its superior stability compared to the PL2303 or CH340 chips. Based on the Silicon Labs CP2102 chipset, it creates a virtual COM port on your computer, allowing it to communicate with microcontrollers that lack a built-in USB interface. This module is the gold standard for programming the Arduino Pro Mini, ESP8266 (ESP-01), and various GPS/GSM modules. Its compact design includes an integrated clock and EEPROM, meaning it requires no external crystal to operate, resulting in a very reliable data link even at high baud rates.
Key Highlights
Stable Data Transfer: Features an internal 1024-byte transmit/receive buffer, ensuring smooth data flow without the "Code 10" driver issues often found in counterfeit PL2303 modules.
Auto-Reset Support: Includes the DTR (Data Terminal Ready) pin, which is essential for Arduino users as it allows the IDE to automatically reset the board and initiate the upload process.
Dual Power Rails: Provides both 3.3V and 5V power output pins, making it versatile enough to power low-power sensors or 5V microcontrollers directly from the USB port.
Silicon Labs Reliability: The CP2102 is highly regarded for its robust driver support across Windows 10/11, macOS, and Linux.
Self-Protected: Typically includes an onboard 500mA resettable fuse to protect your computer's USB port from accidental overcurrent or shorts in your project.
Technical Specifications
USB Specification: 2.0 compliant; full-speed (12 Mbps)
Temperature Range: -40°C to +85°C
Current Consumption: ~20mA (Static)
Dimensions: 26.5mm x 15.5mm
Handshaking: Supports hardware (RTS/CTS) and software handshaking.
Installation Tip from Robogears Unlike the PL2303, the CP2102 is often "plug-and-play" on modern operating systems. However, if your COM port doesn't appear, you can download the "VCP (Virtual COM Port) Drivers" directly from the Silicon Labs website. When wiring, remember that TX (Module) connects to RX (MCU) and RX (Module) connects to TX (MCU). If you are programming an ESP8266, ensure you use the 3.3V pin, as providing 5V can permanently damage the ESP chip's logic pins.
Note: This product is the CP2102 Breakout Module ONLY. USB extension cables and jumper wires are sold separately. Product images are for illustration purposes only.