Bluetooth 2.0 Module V3 For Arduino

DF-Bluetooth V3 Bluetooth module provides a compact wireless serial communication solution based on the CSR BC417143 chipset and Bluetooth v2.0 + EDR protocol. This embedded Bluetooth serial module enables transparent data transmission between microcontrollers and Bluetooth-enabled computers or smartphones. A distinctive dual-board architecture improves physical robustness while reducing electrostatic discharge risk during development and integration. Wide input voltage support from 3.5V to 8V together with a dedicated 3.3V supply option allows flexible deployment across robotics controllers, embedded development boards, and Arduino-based communication systems requiring reliable short‑range wireless links.

Dual‑Board Structure for Enhanced Electrical Protection

A unique stacked double‑board layout enhances durability and provides improved protection against electrostatic damage during handling and installation. This hardware structure helps maintain stable operation in prototyping environments and educational laboratories where repeated wiring and experimentation are common. Integrated onboard antenna design further improves signal integrity and eliminates the need for external RF components. Consistent wireless connectivity across typical development setups allows stable communication links with laptops, Bluetooth USB dongles, and mobile devices.

Flexible Power Input and Hardware Configuration

This wireless serial communication board supports dual DC power input methods including a wide 3.5V–8V supply and a dedicated 3.3V input. Such flexibility simplifies integration with diverse embedded platforms and battery-powered electronics. A hardware DIP switch enables quick configuration of operating modes. LED Off mode disables indicator lighting for power saving operation, while AT Mode activates command configuration access. Through AT commands, parameters such as baud rate and master/slave roles can be modified for customized wireless communication setups.

Clear Status Indication and Reliable Serial Data Link

Integrated STATE and LINK LED indicators provide immediate visual feedback about wireless activity and pairing status. STATE indicator behavior signals search and connection states through defined blinking patterns, while the LINK indicator confirms successful pairing. Support for Bluetooth Serial Port Profile (SPP) enables transparent UART data transmission between connected devices. This Bluetooth communication module therefore acts as a wireless serial cable replacement, enabling stable bidirectional data exchange across embedded controllers, mobile phones, and PC hosts.

Reliable short‑range wireless communication enables numerous embedded and educational applications. This Bluetooth serial module supports transparent UART data links for robotics telemetry, wireless sensor monitoring, mobile‑controlled electronics, and classroom prototyping. Compatibility with common Bluetooth adapters, laptops, and Android smartphones simplifies integration into rapid development workflows where cable‑free communication improves flexibility and mobility.

Wireless Parameters

Serial Communication

Status Indicator

Electrical Parameters

Environmental

Physical Dimensions