-
SPP-C Bluetooth 2.0 Module | Serial Port Profile | Wireless UART Bridge
The SPP-C (also known as JDY-31) is a classic Bluetooth 2.0 module designed specifically for simple and reliable wireless serial communication. It operates as a transparent serial port bridge, making it an ideal solution for replacing cable connections between microcontrollers, computers, and other devices. With its focus on the Serial Port Profile (SPP) and easy-to-use AT command configuration, the SPP-C provides a straightforward and cost-effective method for adding Bluetooth functionality to a wide range of projects.
-


Product Description :
The SPP-C Bluetooth module offers a robust and user-friendly approach to wireless data transmission. Based on the JL AC692X series chip, it is pre-configured to create a seamless, transparent wireless UART channel. Any data sent to its UART interface is automatically transmitted via Bluetooth to a paired device, and vice-versa, functioning exactly like a wireless serial cable.
The module is designed for simple integration, operating at 3.3V logic levels and supporting a wide range of configurable baud rates. Its compact size and low power consumption make it suitable for various applications, from DIY electronics to commercial products. The SPP-C is typically used as a slave device, waiting for a connection from a master like a smartphone or PC, but it can also be configured as a master to initiate connections to other slave devices.
Key Features :
-
Dual Mode Operation: Can be configured as either a Master or a Slave device.
-
Transparent Data Transmission: Creates a seamless wireless UART bridge with no protocol overhead.
-
Simple AT Command Configuration: Easy setup of parameters like name, baud rate, and PIN via serial commands.
-
Compact Form Factor: Small size for easy integration into space-constrained designs.
-
Integrated Antenna: Built-in PCB antenna for a complete solution without external components.
-
Wide Voltage Compatibility: Supports a common 3.3V operating voltage.
-
Auto-Connection Feature: Can be set to automatically reconnect to a paired device on power-up.
Applications :
The SPP-C module is perfectly suited for a variety of wireless data transfer applications, including:
-
Wireless Communication for Arduino, ESP8266, and other Microcontrollers
-
Bluetooth-enabled DIY Robotics and RC Models
-
Wireless Data Logging from Sensors
-
Cable Replacement for Industrial Serial Devices
-
Wireless Configuration and Debugging Interfaces
-
Simple Home Automation and Control Systems
Technical Specifications :
Category Specification Bluetooth Version V2.0 (Supports SPP Profile) Operating Mode Master or Slave (Configurable) Frequency Band 2.4 GHz ISM Band Interface UART (3.3V TTL Logic Level) Supply Voltage 3.3 VDC Operating Temperature -10°C to +65°C RF Power Class 2 (Approx. 4-6 dBm) Range Up to 10 meters (in open space) Default Baud Rate 9600 bps (Configurable via AT commands) Default PIN Code "1234" (Configurable via AT commands) Antenna Integrated PCB Antenna Dimensions 26.9mm x 14.9mm x 2.2mm
-