Comparison page

JDY-31 vs A7670C

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.

JDY-31

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

A7670C

Projects needing 4G Cat.1 and UART with a commonly available communication part.

Specification Matrix

DimensionJDY-31 A7670C

CategoryCommunicationCommunication

MakerJDYSIMCom

CoreNot specifiedNot specified

ClockNot specifiedNot specified

WirelessNot specifiedNot specified

Voltage3.3V3.3V

LibrariesArduinoArduino

Price$1.00 - $3.00$6.00 - $15.00

Known Tradeoffs

JDY-31

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

A7670C

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

Open Individual Model Pages

JDY-31

JDY

Low-cost Bluetooth serial module sold in Chinese marketplaces as an HC-05-class alternative.

China-madeCommunication66% confidence

A7670C

SIMCom

4G Cat.1 cellular module used in low-cost IoT telemetry products.

China-madeCommunication74% confidence