Schematik raised $4.6M to help anyone build hardware with AI$4.6MIL PRE-SEED ANNOUNCEMENT
CommunityPartsBlogAbout
CommunityPartsBlogAbout

Product

  • Home
  • Try Schematik
  • Download

Resources

  • Community
  • ESP32 projects
  • Blog
  • Press
  • Information for AI

Compare

  • Schematik or Fritzing
  • Schematik or Tinkercad
  • Schematik or Wokwi
  • Schematik or Claude Code

Company

  • Company
  • Jobs
  • Privacy
Making
hardware
less hard

Built with love in Europe. For makers everywhere.

© 2026 Schematik

All rights reserved

  1. Parts
  2. /Boards
  3. /Arduino boards

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

OverviewAlternates
DFRobot Beetle BLE - The Smallest Board Based on Arduino Uno with Bluetooth 4.0 - DFRobot - DFR0339

Compact Arduino Uno compatible board with integrated Bluetooth 4.0 BLE. Supports USB and wireless OTA programming; suited for wearable and space-constrained projects.

Parts tray full · 5 max · remove a part to add another
DFRobot Beetle BLE - The Smallest Board Based on Arduino Uno with Bluetooth 4.0 — DFRobot — DFR0339

Offers

  • DFRobot$14.90
  • ?DigiKey$14.90
  • Kiwi Electronics€17.53
  • Pimoroni

Offers

  • DFRobot$14.90
  • ?DigiKey$14.90
  • Kiwi Electronics€17.53
  • Pimoroni

Pinout

Logical pinout · physical placement not verified
DFROBOT BEETLE BLE - TRXA0TXA1SDAA2SCLA3D2VIND35VD4GNDD5
  • RX
    Type · UART
  • TX
    Type · UART
  • SDA
    Type · I2C
  • SCL
    Type · I2C
  • D2
    Type · GPIO
  • D3
    Type · GPIO
  • D4
    Type · GPIO
  • D5
    Type · GPIO
  • A0
    Type · Analog
  • A1
    Type · Analog
  • A2
    Type · Analog
  • A3
    Type · Analog
  • VIN
    Type · Power
  • 5V
    Type · Power
  • GND
    Type · Ground
PinType
RXUART
TXUART
SDAI2C
SCLI2C
D2GPIO
D3GPIO
D4GPIO
D5GPIO
A0Analog
A1Analog
A2Analog
A3Analog
VINPower
5VPower
GNDGround
Logical pinout · physical placement not verified
DFROBOT BEETLE BLE - TRXA0TXA1SDAA2SCLA3D2VIND35VD4GNDD5

Pin details

15 connections
  1. RX
    UART
  2. TX
    UART
  3. SDA
    I2C
  4. SCL
    I2C
  5. D2
    GPIO
  6. D3
    GPIO
  7. D4
    GPIO
  8. D5
    GPIO
  9. A0
    Analog
  10. A1
    Analog
  11. A2
    Analog
  12. A3
    Analog
  13. VIN
    Power
  14. 5V
    Power
  15. GND
    Ground

Arduino

76 other options

About 75 boards across every Arduino generation: 5V Uno/Mega/GIGA, 3.3V MKR and Portenta, plus DFRduino and Bluno compatibles. Confirm the voltage rail before stacking any shield.

View all 76
  • 10 I/Os PLC Module - CPU Arduino Nano (Optoisolated Output) visual preview

    10 I/Os PLC Module - CPU Arduino Nano (Optoisolated Output)

  • 10 I/Os Relay Module - CPU Arduino Nano (Relay Output) visual preview

    10 I/Os Relay Module - CPU Arduino Nano (Relay Output)

  • Adafruit METRO 328 - Arduino Compatible - with Headers visual preview

    Adafruit METRO 328 - Arduino Compatible - with Headers

  • Adafruit Metro Mini 328 V2 - Arduino-Compatible - 5V 16MHz [STEMMA QT / Qwiic] visual preview

    Adafruit Metro Mini 328 V2 - Arduino-Compatible - 5V 16MHz [STEMMA QT / Qwiic]

  • Arduino DUE Microcontroller Board visual preview

    Arduino DUE Microcontroller Board

  • Arduino Duemilanove 328 visual preview

    Arduino Duemilanove 328

  • Arduino Esplora visual preview

    Arduino Esplora

  • Arduino GIGA R1 WiFi visual preview

    Arduino GIGA R1 WiFi

  • Arduino Leonardo visual preview

    Arduino Leonardo

  • Arduino Leonardo ETH visual preview

    Arduino Leonardo ETH

  • Arduino M0 Board (DFR0378) visual preview

    Arduino M0 Board (DFR0378)

  • Arduino M0 Pro visual preview

    Arduino M0 Pro

Related groups

4 groups
10 I/Os Relay Module - CPU ESP32 (Relay Output) visual preview

ESP32

Wi-Fi and Bluetooth on a single chip, in every shape from Espressif DevKitC to Adafruit Feathers with STEMMA QT, DFRobot FireBeetles tuned for battery life, and Seeed XIAOs under a thumbnail.

Boards · ESP32 boards · 156 parts

15x7 CharliePlex LED Matrix FeatherWing - Cool White visual preview

Add-ons

About 270 add-ons across Pi HATs, Arduino shields, and FeatherWings. The same function — motor control, PoE, display — usually ships once per host connector family. Get the host board right first.

Boards · HATs, Shields & add-ons · 270 parts

16-Ch Servo Driver Breakout for micro:bit, I2C visual preview

Other MCUs

Specialists: Teensy for high-clock audio and USB, Adafruit SAMD boards running CircuitPython or the Arduino IDE, proper STM32 eval kits, and the micro:bit classroom ecosystem. Schematik builds target ESP32, Arduino Uno, and Pico; come here when you have a specific reason to.

Boards · Other MCU boards · 229 parts

Adafruit DVI Breakout Board for HDMI Source Devices visual preview

Pi Pico

The Raspberry Pi MCU line — Pico, Pico 2, and third-party boards on the same silicon — plus a deep bench of Pico-pinout displays, loggers, and radio modules that do nothing without a Pico plugged in.

Boards · Pico & RP2040 boards · 43 parts