SMD Bluetooth Module JDY 31B SPP Protocol HC 05 3

The JDY-31B Bluetooth Module is a versatile wireless communication solution based on Bluetooth 3.0 SPP (Serial Port Protocol) technology. This compact surface-mount device enables seamless wireless serial communication between your projects and Bluetooth-enabled devices including computers, smartphones, and tablets running Windows, Linux, or Android. With its transparent transmission capability, the JDY-31B acts as a wireless serial port replacement, making it ideal for IoT applications, remote control systems, and wireless data logging. The module operates at 3.3V with low power consumption and supports data rates up to 128,000 baud, achieving transmission speeds of 16 KB/s. While functioning only as a Bluetooth slave device, it offers reliable connectivity with a range of approximately 10 meters. The JDY-31B is compatible with many existing HC-05/HC-06 based projects, though some pin configuration adjustments may be required. Its small form factor and simple interface make it perfect for space-constrained applications and rapid prototyping.