Overview: CH340 USB to TTL Serial Converter Module
The CH340 USB to TTL converter module provides a simple and affordable way to convert a computer USB port into a TTL serial interface. Powered by the CH340G chipset, this module is ideal for uploading code, debugging firmware, and communicating with Arduino, ESP8266, ESP32, Raspberry Pi HATs, sensors, and other TTL-level devices.
Key Features
- CH340G chipset for reliable USB-to-serial conversion
- Selectable TTL logic levels: 3.3V or 5V (jumper-based)
- Mini USB connector for compact setup and low profile
- TX and RX indicator LEDs for instant activity feedback
- Plug and play support across Windows, macOS, and Linux
- Breadboard and development board friendly footprint
- High baud rates up to 1 Mbps, suitable for many serial devices
Technical Specifications
- Chipset: CH340G
- Interface: USB 2.0 to TTL serial
- Logic Levels: 3.3V / 5V selectable (jumper)
- Baud Rate: Up to 1 Mbps
- Indicators: TX, RX LEDs
- USB Connector: Mini USB
- OS Compatibility: Windows, macOS, Linux
- Dimensions: Approximately 4.3 x 1.6 cm
Common Applications
- Arduino serial programming and bootloader flashing
- ESP8266 and ESP32 power, programming, and debugging
- Raspberry Pi HAT development and serial monitoring
- Sensor module testing and serial-enabled peripheral integration
- Industrial device debugging and field firmware checks
- Modern replacement for legacy RS232 adapters when TTL is accepted
How to Use the CH340 Module
Basic Connection Steps
- Select the correct logic level (3.3V or 5V) using the jumper to match your device.
- Connect the module TX to the target device RX and RX to the target device TX.
- Attach GND between the module and the target device.
- Plug the mini USB cable into your computer to power the module and establish the serial link.
Driver and Software Notes
- Download CH340 drivers if your operating system does not recognize the module automatically.
- Use a serial terminal (for example, PuTTY, screen, or the Arduino IDE serial monitor) to communicate with connected devices.
- If you see no COM port, check the logic level jumper and ensure GND is common between host and target device.
Why Choose This CH340 USB to TTL Converter
This module delivers stability, affordability, and ease of use for students, makers, and engineers. It offers a practical alternative to more expensive USB-to-serial chips while maintaining wide OS compatibility and strong community support. For developers in Islamabad, it is a trusted and replaceable tool in labs and hobby benches.
Practical Tips and Troubleshooting
- If the module is not detected on Windows, install the CH340 driver and restart.
- Confirm jumper position when moving between 3.3V and 5V systems to avoid damaging devices.
- Check TX/RX LED activity to confirm data flow; reverse TX/RX wiring if no data appears.
- Use short, shielded USB and serial wires for reliable results in noisy environments.
Ordering and Availability in Islamabad
Ready to add reliable USB-to-serial communication to your projects? Order this CH340 USB to TTL converter module from colgroad.com and get fast delivery to Islamabad and other locations. This module is an essential, low-cost utility for anyone working with microcontrollers and embedded hardware.
Related Resources
- How to install CH340 driver for Windows and Linux
- CH340 vs FTDI: Which USB to serial module is best
- Troubleshooting CH340 USB serial connection issues
- CH340 with ESP8266: Step-by-step guide
- CH340 module pinout explained
Note
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