Comparison page

CH340G vs HC-05

Side-by-side selection notes for specs, ecosystem readiness, known issues, and data confidence. This page is generated from structured component fields instead of a hand-written article.

CH340G

Projects needing USB UART and Low cost with a commonly available communication part.

HC-05

Projects needing Bluetooth and UART with a commonly available communication part.

Specification Matrix

DimensionCH340G HC-05

CategoryCommunicationCommunication

MakerWCHGeneric

CoreNot specifiedNot specified

ClockNot specifiedNot specified

WirelessNot specifiedNot specified

Voltage3.3V3.3V

LibrariesNeeds verificationArduino

Price$0.20 - $0.60$1.50 - $4.00

Known Tradeoffs

CH340G

Breakout boards may use different pin labels or regulator choices
Clone modules can differ from the original datasheet part

HC-05

Breakout boards may use different pin labels or regulator choices
Clone modules can differ from the original datasheet part

Open Individual Model Pages

CH340G

WCH

USB-to-UART bridge chip used on many low-cost Arduino-compatible and ESP development boards.

China-madeCommunication86% confidence

HC-05

Generic

Classic Bluetooth serial module used for Arduino UART wireless control demos.

China-madeCommunication72% confidence