JDY-31B Bluetooth 3.0 SPP Module (HC-05/06 Compatible)

Description

The JDY-31B Bluetooth module implements the Serial Port Profile (SPP) over Bluetooth 3.0, creating a transparent wireless serial cable replacement. Its architecture is optimized for stable, low-latency data streaming between a host microcontroller and a paired Bluetooth device, such as a smartphone or computer. The module integrates a power amplifier to boost output signal strength, supporting reliable communication at distances significantly beyond standard Class 2 Bluetooth range.

Designed for seamless integration, it operates from a 3.3V supply and communicates via a standard UART (TX/RX) serial interface. Configuration and operational mode changes are handled through a dedicated AT command set, allowing developers to customize parameters like baud rates from 1200 to 128000bps. The module’s firmware and pinout are fully compatible with the widely adopted HC-05 and HC-06 modules, enabling easy upgrades or replacements in existing designs without hardware modifications.