CH340G to TTL Serial Converter

The CH340G to TTL Serial Converter offers a cost-effective USB-to-TTL serial solution. Widely used for Arduino programming, ESP flashing, and serial debugging, it provides reliable communication at a budget-friendly price.

Key Features

• CH340G USB to TTL serial conversion
• 3.3V and 5V operation on TTL side
• USB Type-A or micro-USB connector
• TX and RX LEDs for activity indication
• DTR pin for auto-reset programming
• Low cost alternative to FTDI
• Wide OS compatibility with available drivers

Technical Specifications

Applications

• Budget Arduino programming
• ESP8266/ESP32 development
• Serial communication projects
• Device configuration and debugging
• Low-cost serial adapter for workshops
• Production programming setups

Important Notes

• Install CH340 driver before use (Windows/macOS may not auto-detect)
• Some Windows 10/11 versions require driver signature override
• Verify voltage jumper/switch set correctly (3.3V or 5V)
• DTR line needed for auto-reset on Pro Mini and ESP
• CH340E is smaller variant with fewer handshake pins