DFRobot Beetle BLE - The Smallest Board Based on Arduino Uno with Bluetooth 4.0

DFRobot

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SKU:
147-DFR0339
MPN:
DFR0339
DFRobot Beetle BLE - The Smallest Board Based on Arduino Uno with Bluetooth 4.0, Evelta
The Beetle BLE, formerly Bluno Beetle, is an ultra-compact Arduino-compatible board with Bluetooth 4.0. It's one of the smallest BLE boards available, easy to program with Arduino IDE. It's compatible with Bluno, supports Bluetooth HID,iBeacon modes. View full description
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Technical Specifications

Brand:
DFRobot
Bluetooth Chip:
CC2540
Sensitivity:
-93dBm
Working Temperature:
-10 C ~ +85 C
Maximun Distance:
50m(1968.50")(Open field)
Microcontroller:
ATmega328
Clock frequency:
16 MHz
Operating voltage:
5V DC
Input voltage:
8V (Vin < 8V)
Digital Pin:
4
Analog Pin:
4
PWM Output:
2
UART interface:
1
I2C interface:
1
Micro USB interface:
1
Power port:
2
Size:
28.8mm X 33.1mm(1.13" x 1.30")
Weight:
10g

Warranty Information

All the products supplied by Evelta are genuine and original. We offer 14 days replacement warranty in case of manufacturing defects. For more details, please visit our cancellation and returns page.

Description

Resource

DFRobot Beetle BLE - Ultra-Compact Arduino Uno Compatible Development Board with Bluetooth 4.0 Low Energy, HID, and iBeacon Support
 

The DFRobot Beetle BLE is an ultra-compact Arduino Uno-compatible development board integrating Bluetooth 4.0 Low Energy directly onto one of the smallest BLE-enabled microcontroller boards available in the Arduino ecosystem. Built around the ATmega328 running at 16MHz, the Beetle BLE delivers the same processing core as a full-size Arduino Uno in a footprint sized for space-constrained wearable, embedded, and IoT projects where board dimensions directly limit design feasibility. Code is uploaded and developed entirely within the standard Arduino IDE without additional libraries, drivers, or board manager packages beyond what the standard IDE installation provides, keeping the development workflow familiar for anyone with existing Arduino experience and removing the setup friction common with third-party BLE development boards.

The Beetle BLE is fully compatible with the DFRobot Bluno series in terms of firmware, instructions, and wireless programming procedures, allowing builders already working within the Bluno ecosystem to integrate the Beetle BLE into existing projects without adapting code or communication protocols. Bluetooth HID mode enables the board to present itself directly to a host device as a standard Bluetooth keyboard, mouse, or gamepad without requiring custom application software on the connected device, making it directly applicable to wireless human-interface projects and accessibility builds. iBeacon mode supports Bluetooth proximity broadcasting for indoor positioning, retail, and location-aware IoT applications. Wireless programming over BLE eliminates the need to physically access the board for firmware updates in sealed or hard-to-reach enclosures, a significant practical advantage in wearable and permanently installed embedded deployments. The micro USB port handles both wired programming and power supply, maintaining compatibility with standard USB development cables and power banks.

Key Features
 
  • Microcontroller: ATmega328 at 16MHz, the same core as Arduino Uno, for full Arduino IDE sketch compatibility without additional libraries or drivers
  • Bluetooth 4.0 BLE: Integrated Bluetooth Low Energy for energy-efficient wireless communication with smartphones, tablets, and BLE-capable host devices
  • Ultra-Compact Form Factor: One of the smallest BLE-enabled Arduino-compatible boards available, purpose-sized for wearable and space-constrained embedded builds
  • Wireless Programming: Firmware upload over BLE without physical board access, suited for sealed enclosures and permanently installed deployments
  • Bluetooth HID Support: Presents as a standard Bluetooth keyboard, mouse, or gamepad to connected host devices without custom application software
  • iBeacon Mode: Bluetooth proximity broadcasting for indoor positioning, location-aware IoT, and proximity-triggered application builds
  • Bluno Series Compatible: Fully compatible with all DFRobot Bluno series boards in terms of instructions, firmware, and wireless programming procedures
  • Standard Arduino IDE: No extra libraries, drivers, or board manager packages required beyond the standard Arduino IDE installation
  • Micro USB Port: Wired programming and power supply via standard micro USB cable, compatible with common power banks and USB chargers
  • Arduino Uno Pin Compatibility: Retains Arduino Uno-compatible I/O for direct integration with existing Arduino shields and peripheral modules
Applications
 
  • Wearable electronics and body-worn sensor builds requiring ultra-compact BLE-enabled Arduino-compatible processing
  • Bluetooth HID wireless keyboard, mouse, and gamepad controller projects without custom host-side application software
  • iBeacon indoor positioning and proximity-triggered IoT installations in retail, museum, and smart building environments
  • BLE-connected sensor nodes for IoT data logging and wireless telemetry on smartphone and tablet host platforms
  • Sealed and permanently installed embedded builds benefiting from wireless over-the-air firmware programming via BLE
  • DFRobot Bluno ecosystem projects requiring a smaller board footprint without changing firmware or communication procedures
Package List
 
  • Beetle BLE x1

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