Aluminum Case CP2102 Module USB to TTL Serial Module STC Downloader

SKU: FA1056-0
Main Chipset

Silicon Labs CP2102
Interface

USB 2.0 (Full Speed 12Mbps) to TTL Serial
Baud Rates

300 bps to 1 Mbps
Output Voltage

Dual Output: 3.3V and 5V (Selectable pins)
Logic Level

3.3V (5V Tolerant)
Current Limit

500mA Self-resetting fuse
Output Pins

3.3V, 5V, TXD, RXD, GND, DTR
Case Material

Anodized Aluminum Alloy
The Aluminum Case CP2102 USB to TTL Serial Module is a professional-grade communication tool designed for high-stability serial data transfer. Encased in a rugged aluminum shell, this module utilizes the premium Silicon Labs CP2102 chipset to provide a reliable bridge between your computer’s USB port and various microcontroller serial interfaces (TTL).
Long Description
In the 2026 development landscape, signal integrity and hardware durability are paramount. This CP2102 module distinguishes itself by replacing standard exposed circuitry with a high-quality aluminum alloy housing. This shell serves three purposes: it provides superior protection against physical impact, shields the internal components from electromagnetic interference (EMI), and prevents accidental short circuits caused by contact with metal surfaces on a busy workbench.
For business purchasers, this module is an ideal choice for field technicians and industrial maintenance kits, where durability is non-negotiable. For individual makers, it offers a “gold-standard” connection for unbricking routers, programming Pro-Mini boards, or debugging high-speed sensor data. The integrated CP2102 chip is highly regarded for its robust drivers and minimal jitter compared to budget alternatives.
Key Features
  • Premium Aluminum Shielding: Durable, anti-static shell that protects against physical wear and electronic noise.
  • High-Stability CP2102 Chip: Genuine Silicon Labs hardware ensures native driver support across most operating systems and stable high-speed communication.
  • STC Auto-Download Ready: Optimized for STC microcontrollers, supporting easy firmware flashing.
  • Built-in Safety: Includes an onboard self-resetting fuse (500mA) to protect your computer’s USB port from accidental short circuits on the target board.
  • Status Indicators: Features clear onboard LEDs for Power (PWR), Receive (RXD), and Transmit (TXD) to allow for instant visual troubleshooting.
  • Wide Compatibility: Supports all major OSs including Windows 11/10/8, macOS, Linux, and Android.
Usage Instructions
  1. Driver Installation: Download the Official CP210x VCP Drivers from Silicon Labs. (Note: Most modern OSs will install these automatically).
  2. Wiring the Target: Connect the module to your microcontroller (e.g., Arduino Pro Mini, STC chip, ESP8266) using the following cross-connection logic:
    • Module TXD -> Target RXD
    • Module RXD -> Target TXD
    • Module GND -> Target GND
    • Module 5V/3.3V -> Target VCC (Only if the target needs power from USB).
  3. Software Configuration: Open your Serial Monitor or IDE (Arduino, Putty, Teraterm), select the newly assigned COM port, and set your desired Baud Rate.
  4. Flashing STC Chips: Use the STC-ISP software; the DTR pin can be utilized for auto-resetting the target if required.
Q: Why choose CP2102 over the cheaper CH340 or PL2303 modules?

The CP2102 is significantly more stable at high baud rates and has much better driver support. It is less prone to “Code 10” errors on Windows and provides cleaner signal timing, which is essential for business-critical deployments.

Q: Is the logic level 3.3V or 5V?

The module provides power pins for both 3.3V and 5V. The data signals (TX/RX) operate at 3.3V logic, which is safely 5V tolerant, meaning it can communicate with both 3.3V (ESP32/STM32) and 5V (Arduino/Atmega) systems without additional level shifters.

Q: Can I use this to program an Arduino Pro Mini?

Yes. Since this module breaks out the DTR pin, it can trigger the auto-reset required by the Arduino IDE to start the flashing process.

Q: What happens if I accidentally short the power pins?

The module features an onboard 500mA resettable fuse. If a short occurs, the fuse will trip to protect your PC’s motherboard. Once the short is removed and the module cools down, it will function normally again.

Q: Does the aluminum case interfere with the signals?

No, the case is internally insulated from the signal pins. It actually improves performance by shielding the UART traces from external electrical noise (EMI) found in industrial environments.

Q: Which cable do I need?
This module usually features a standard USB-A male connector built into the case, so it plugs directly into your computer port like a USB flash drive. No extra USB cable is required.

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