FireBeetle ATMEGA328P BLE 4.1 Control Board

SKU: DFR0492

The article introduces the FireBeetle ATMEGA328P BLE 4.1 Control Board, part of the DFRobot FireBeetle series optimized for IoT development with low power consumption and Bluetooth Low Energy 4.1 integration, offering superior performance compared to Bluno series. It features a DIALOG Bluetooth 4.1 chip, providing stable connectivity and transmission rates up to 4Kbyte/s while maintaining power efficiency at just 25uA in POWER DOWN mode. The board supports multiple Bluetooth cascades and KISS connection for seamless communication between devices, making it ideal for low power applications such as wearable technology and smart tools.

Front of FireBeetle Board-328P BLE 4.1 with low power Arduino microcontroller and SMA connector.-DFRobot product sku:DFR0492 image.
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  • Specification

    Parameter Details
    Processor ATMEGA328P
    Bootloader Arduino Pro or Pro Mini, ATmega328 (3.3V, 8MHz)
    Operating Current 3.3V
    VCC I/O Voltage 3.7V~5.5V
    Lithium Battery Voltage 3.7V
    Support maximum transmission rate 4Kbyte/s (more device, lower rate)
    Support low power consumption 25uA (POWER DOWN); 70uA (enabled interruption)
    Support maximum discharge current 600mA (LDO-3.3V OUTPUT)
    Support maximum charge current 400Ma
    Digital Interfaces 14
    Analog Interfaces 6
    SPI 1
    I2C 1
    UART 1
    LED_BUILTIN D13
    Interface Mode 2.54mm (Pin/Female header), soldering free in default
    Dimension 58×29 mm/ 2.28×1.14 inches

    Pinout

    DFR0492-Pinout

    LED Indicators

    LED Function Status Description
    RX Serial Data Receive Indicator Illuminates when the device is receiving serial data.
    TX Serial Data Transmit Indicator Illuminates when the device is sending serial data.
    CHG Battery Charge Indicator Without Battery: Flashes. Charging: Steady On. Fully Charged: Off.
    LINK Bluetooth Connection Indicator Connected: Lights up for 3 seconds upon successful connection, then blinks every 3 seconds. Disconnected: Off.

    Buttons

    Button Primary Function Usage Instructions
    BOOT 1. Bluetooth Firmware Update 2. Enable KISS Connection Firmware Update: Hold the BOOT button while powering on (plugging in USB) to enter update mode. See the Firmware Update section. Approach Connection (KISS): While powered on, hold the BOOT button and bring the device close to the target Bluetooth peripheral to initiate pairing.
    RST Arduino Reset Resets the connected Arduino board.

    The VCC pin outputs the supply voltage. (USB Supply: 5V, Lithium Battery Supply: 3.7V)

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