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Bluetooth module V3

SKU: TEL0026

Bluetooth module V3 offers advanced connectivity with a unique dual-board design for electrostatic protection and aesthetic appeal. It supports a wide voltage range, making it versatile for various scenarios, and includes STATE and LINK indicators for operational status. The onboard antenna ensures quality signal and extended transmission distance. With a transparent serial port, it pairs easily with Bluetooth adapters and devices, facilitating convenient redevelopment. DIP settings allow status control, and AT mode enables command adjustments, including baud rate and master-slave configurations. Perfect for seamless data communication between two MCUs.

Angled shot of the top side of a black Bluetooth 2.0 V3 module with USB dongle connectors for Arduino wireless connectivity.-DFRobot product sku:TEL0026 image.

Downloadable Resources

  • Docs
  • Tech Specs
  • Blog
    • 1. AT Mode Configuration Guide

    This guide provides detailed instructions on configuring the DF-Bluetooth V3 module's AT mode using hardware switches and CoolTerm software, including setting parameters such as name, baud rate, and master/slave mode, along with entering and exiting AT mode.
    2. Usage Example for Arduino-PC Communication

    This article guides you through the process of setting up communication between Arduino and PC using the DF-Bluetooth module. It covers hardware preparation, software installation, and step-by-step instructions for pairing and connecting devices, along with sample code for testing data transmission.
    3. Usage Example for Two Modules-Data Transmission

    This tutorial details the setup and configuration of two Bluetooth modules for data transmission using Arduino. It covers the hardware and software preparation, module configuration, and provides sample code for transmitting and receiving data, ensuring seamless wireless communication.
    4. Usage Example for Arduino-Android Communication

    This guide offers a comprehensive example of establishing communication between an Arduino UNO and an Android device using a Bluetooth module, complete with hardware and software setup instructions, Bluetooth configuration, and sample code for transmitting and receiving data.

    Specification

    Parameter Details
    BLE Chip CSR BC417143
    Bluetooth Protocol Bluetooth Specification v2.0 +EDR
    USB Protocol USB v1.1/2.0
    Working Frequency 2.4-2.48GHz unlicensed ISM Band
    Modulation Mode GFSK (Gaussian Frequency Shift Keying)
    Power ≤4dBm, Class 2
    Transmission Distance 20-30 in free space
    Sensitivity ≤-84 dBm at 0.1% BER
    Transmission rate Asynchronous: 2.1 Mbps (Max)/160 kbps; Synchronous: 1Mbps/1Mbps
    Security Authentication and encryption
    Support profiles Bluetooth serial port
    Baud Rate 4800～1382400/N/ 8/1 Default to 9600/N/ 8/1
    Input Voltage +3.5V～+8V DC or 3.3V DC/50mA
    Working Temperature -20°C-+55°C
    Dimension 40×20×13mm

    Pinout

    TEL0026-PinOut

    Pin Definition
    GND GND
    VCC 3.5-8V DC (When there is VCC input, 3V3 port can be used as 3.3V power output)
    NC Empty Pin
    RXD UART Input(TTL Level), connect to MCU TXD
    TXD UART Output(TTL Level), connect to MCU RXD
    3V3 DC3.3V (When there is 3.3V input, the VCC port cannot be connected to power source)

    FAQ

    • Why do some AT commands return "Error: (16)" when sent to the device?

      Please check the Appendix 1: AT command error in that manual, 16 means "SPP is not initialized", so please send "AT+INIT" to initialize the SPP before sending other AT commands like you mentioned.

    • How can I find or pair with this BT V3 module through my pc or phone when it was run in AT mode? i.e. the AT selection switch was put at AT side.
      Please enter AT mode, send "AT+INIT" first, after a while, send "AT+DISC", wait a second, you could find the BT module in your PC/ phone Bluetooth panel. Default pairing code is: "1234".
    • I want to use it as a wireless module on Arduino, and use my phone as a controller, can it be possible?
      Welcome! For sure it is possible.

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