DFRobot Beetle BLE
Ultra-compact Arduino Uno-compatible board with BLE 4.0 (CC2540), ATmega328P, sewable gold-plated I/O pads, and wireless programming in a 28.8x33.1mm wearable form factor.
$14.90
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Specifications
Components
Microchip ATmega328P running at 16MHz with 32KB flash, 2KB SRAM, and 1KB EEPROM. Fully compatible with Arduino Uno.
Texas Instruments CC2540 Bluetooth Low Energy 4.0 SoC with -93dBm sensitivity, 50m range, supporting HID and iBeacon profiles.
Bus Interfaces
GPIO Map
Overview
The DFRobot Beetle BLE is one of the smallest Arduino BLE boards available, combining an ATmega328P microcontroller (Arduino Uno-compatible) with a TI CC2540 Bluetooth Low Energy 4.0 chip in a compact 28.8x33.1mm package. Part of DFRobot's Bluno series, it supports Bluetooth HID and iBeacon modes with up to 50m range in open field.
The board features V-shaped gold-plated I/O pads designed for sewing into fabric, making it ideal for wearable electronics and e-textile projects. It exposes 4 digital pins, 4 analog inputs, 2 PWM outputs, I2C, and UART interfaces. A standout feature is wireless programming via Bluetooth, eliminating the need for a physical USB connection during development iterations.
With Micro-USB for power and initial setup, 5V operating voltage, and full Arduino IDE compatibility, the Beetle BLE targets wearable projects, Bluetooth HID devices, iBeacon applications, and any compact BLE-enabled project where sewing or embedding into fabric is desired.
Use Cases
4Wearable
Body-worn computing devices including smartwatches, fitness bands, and health monitors.
E-Textiles
Electronic textiles integrate circuits and microcontrollers into fabric for smart clothing, wearable sensors, and interactive garments.
USB HID Device
Implementing a USB Human Interface Device such as a keyboard, mouse, game controller, or MIDI device using native USB support.
Compact IoT Node
Ultra-small microcontroller boards for embedding into tight spaces in IoT projects, props, cosplay, and miniature builds.
Resources
Where to Buy
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