CH340 USB to Serial TTL Adapter

The CH340 USB to Serial TTL Adapter is a high-quality USB-to-UART bridge module that allows seamless communication between a computer and TTL-level serial devices. With a convenient 5 V/3.3 V jumper, it supports a wide range of logic levels, making it perfect for Arduino, ESP8266/ESP32, NodeMCU, and other microcontroller boards.

Built around the CH340G chipset, this adapter offers stable drivers, fast data transfer, and broad operating system compatibility, ensuring hassle-free programming, debugging, and data logging.

🔹 Key Features

• Dual Voltage Support: Onboard jumper selects 5 V or 3.3 V logic level for maximum compatibility.

• CH340G Chipset: Proven USB-to-serial bridge with reliable, widely available drivers.

• Standard Pinout: TX, RX, VCC, GND, DTR, and RTS for direct connection to microcontrollers.

• High Data Rate: Supports baud rates up to 2 Mbps for fast uploads and debugging.

• Cross-Platform Drivers: Compatible with Windows, macOS, and Linux.

• Compact & Lightweight: Easy to carry for field programming or lab use.

🔹 Technical Specifications

• Chipset: CH340G

• Interface: USB 2.0 Type-A to TTL serial

• Logic Voltage: Selectable 3.3 V or 5 V via jumper

• Operating Voltage Range: 3.3 V–5 V

• Baud Rate: 2400 bps to 2 Mbps

• Pins: TXD, RXD, VCC, GND, DTR, RTS

• Dimensions: ~45 mm × 18 mm × 7 mm

• Driver Support: Windows 7/8/10/11, macOS, Linux distributions

🔹 Applications & Use Cases

• Arduino & ESP Programming: Upload sketches and firmware to Arduino boards and ESP modules.

• NodeMCU & IoT Devices: Flash firmware or debug serial output from NodeMCU boards.

• Microcontroller Debugging: Monitor and log data from UART-enabled systems.

• DIY Electronics & Prototyping: Connect custom embedded hardware to a PC for testing.

• Robotics & Automation: Serial communication for sensor data and control signals.

🔹 Advantages for Makers & Engineers

• Works seamlessly with other Electronics Components and sensors that require UART communication.

• Quick jumper selection between 3.3 V and 5 V eliminates the need for external level shifters.

• Open-source libraries and wide OS driver support simplify setup.

🔹 Safety & Precautions

• Ensure the voltage jumper matches the target device’s logic level to avoid damage.

• Always connect GND between the adapter and the target board.

• Use a stable Power Supply when powering external circuits.

🔗 Helpful Internal Links

• Browse Tools and Accessories for cables and testing gear.

• Explore compatible Electronics Components for your next IoT or embedded project.

🎥 Video Tutorial

[YouTube tutorial link here]

📝 Product Summary

The CH340 USB to Serial TTL Adapter with 5 V/3.3 V jumper provides fast, reliable USB-to-UART communication for programming and debugging Arduino, ESP, and other microcontroller projects. Its dual-voltage design and universal driver support make it a must-have tool for every maker.