The JDY-31 SPP-C is a compact Bluetooth serial pass-through module designed for wireless UART communication. Based on Bluetooth 2.0/2.1+EDR protocol, it's an ideal replacement for HC-05/06 modules in IoT projects requiring reliable wireless data transmission.

Bluetooth Version: 2.0/2.1+EDR Working Frequency Band: 2.4GHz - 2.48GHz ISM band Communication Interface: UART Operating Voltage: 1.8-3.6V (3.3V recommended) Operating Temperature: -40°C to 80°C Dimensions: 27 x 13 x 2 mm Weight: 5 g Antenna: Built-in PCB antenna Bluetooth Class: 2 Modulation: GFSK Data Rate: Up to 3 Mbps Sensitivity: -85dBm

