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. /Other MCU boards

Romeo BLE Mini Control Board (DFR0351)

OverviewWiringAlternates
Romeo BLE Mini Control Board (DFR0351) - DFRobot - DFR0351

Compact ATmega328P robot controller with TI CC2540 Bluetooth 4.0, 8 digital and 4 analog pins, and dual H-bridge motor drivers rated 1.2 A continuous per channel. Designed for small mobile robots controllable via smartphone app; board measures 45×38.5 mm.

Parts tray full · 5 max · remove a part to add another
Romeo BLE Mini Control Board (DFR0351) — DFRobot — DFR0351

Offers

  • DFRobot$25.90
  • ?DigiKey$25.90

Offers

  • DFRobot$25.90
  • ?DigiKey$25.90

Pinout

Logical pinout · physical placement not verified
ROMEO BLE MINI CONTROL+VIN-D VCC GND+Servo-LED lightM1 & M2 TerminalsRESETI2CBOOTA 5V GND
  • +VIN-Official table 2 row 1

    Servo & Motor power input 6.5~10v

    Type · Power
  • +Servo-Official table 2 row 2

    Digital port power input 5~12V

    Type · Power
  • M1 & M2 TerminalsOfficial table 2 row 3

    2-Way Motor Controller: Motor 1 : PIN4 (Direction), PIN5 (PWM Speed) Motor 2 : PIN7 (Direction), PIN6 (PWM Speed)

    Type · GPIO
  • I2COfficial table 2 row 4

    I2C interface (A4 & A5)

    Type · I2C
  • A 5V GNDOfficial table 2 row 5

    Gravity Analog Interface: A0, A1, A2, A3

    Type · Ground
  • D VCC GNDOfficial table 2 row 6

    Gravity Digital Interface: D2, D3, D8, D9, D10, D11, D12, D13;

    Type · Ground
  • LED lightOfficial table 2 row 7

    PWR-power indicator TX/RX-Data transmissing/receiving indicator L-D13 led * LINK-Bluetooth link indicator PAIR-Bluetooth pair indicator

    Type · Power
  • RESETOfficial table 2 row 8

    ATmega328P Reset button

    Type · Control
  • BOOTOfficial table 2 row 9

    Used for update BLE Firmware

    Type · Control
PinPositionTypeFunction
+VIN-Official table 2 row 1PowerServo & Motor power input 6.5~10v
+Servo-Official table 2 row 2PowerDigital port power input 5~12V
M1 & M2 TerminalsOfficial table 2 row 3GPIO2-Way Motor Controller: Motor 1 : PIN4 (Direction), PIN5 (PWM Speed) Motor 2 : PIN7 (Direction), PIN6 (PWM Speed)
I2COfficial table 2 row 4I2CI2C interface (A4 & A5)
A 5V GNDOfficial table 2 row 5GroundGravity Analog Interface: A0, A1, A2, A3
D VCC GNDOfficial table 2 row 6GroundGravity Digital Interface: D2, D3, D8, D9, D10, D11, D12, D13;
LED lightOfficial table 2 row 7PowerPWR-power indicator TX/RX-Data transmissing/receiving indicator L-D13 led * LINK-Bluetooth link indicator PAIR-Bluetooth pair indicator
RESETOfficial table 2 row 8ControlATmega328P Reset button
BOOTOfficial table 2 row 9ControlUsed for update BLE Firmware
Logical pinout · physical placement not verified
ROMEO BLE MINI CONTROL+VIN-D VCC GND+Servo-LED lightM1 & M2 TerminalsRESETI2CBOOTA 5V GND

Pin details

9 connections
  1. +VIN-

    Servo & Motor power input 6.5~10v

    Power
    Official table 2 row 1
  2. +Servo-

    Digital port power input 5~12V

    Power
    Official table 2 row 2
  3. M1 & M2 Terminals

    2-Way Motor Controller: Motor 1 : PIN4 (Direction), PIN5 (PWM Speed) Motor 2 : PIN7 (Direction), PIN6 (PWM Speed)

    GPIO
    Official table 2 row 3
  4. I2C

    I2C interface (A4 & A5)

    I2C
    Official table 2 row 4
  5. A 5V GND

    Gravity Analog Interface: A0, A1, A2, A3

    Ground
    Official table 2 row 5
  6. D VCC GND

    Gravity Digital Interface: D2, D3, D8, D9, D10, D11, D12, D13;

    Ground
    Official table 2 row 6
  7. LED light

    PWR-power indicator TX/RX-Data transmissing/receiving indicator L-D13 led * LINK-Bluetooth link indicator PAIR-Bluetooth pair indicator

    Power
    Official table 2 row 7
  8. RESET

    ATmega328P Reset button

    Control
    Official table 2 row 8
  9. BOOT

    Used for update BLE Firmware

    Control
    Official table 2 row 9

Start wiring

USB · 3.3 V

Confirm the data interface matches your host board.

Module pins: +VIN-, +Servo-, LED light, A 5V GND, D VCC GND, I2C. Schematik maps them to your board in the app.

Other MCUs

228 other options

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.

View all 228
  • :MOVE mini MK2 buggy kit visual preview

    :MOVE mini MK2 buggy kit

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

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

  • 2x40 Right Angle Edge Connector for micro:bit visual preview

    2x40 Right Angle Edge Connector for micro:bit

  • 32F429IDISCOVERY / STM32F429I-DISC1 Discovery Kit visual preview

    32F429IDISCOVERY / STM32F429I-DISC1 Discovery Kit

  • 7-segment for micro:bit visual preview

    7-segment for micro:bit

  • Adafruit CAN Bus BFF Add-On for QT Py visual preview

    Adafruit CAN Bus BFF Add-On for QT Py

    $8.95
  • Adafruit CH552 QT Py - 8051 Dev Board with STEMMA QT visual preview

    Adafruit CH552 QT Py - 8051 Dev Board with STEMMA QT

    $4.95
  • Adafruit CRICKIT for Circuit Playground Express visual preview

    Adafruit CRICKIT for Circuit Playground Express

  • Adafruit CRICKIT for micro:bit visual preview

    Adafruit CRICKIT for micro:bit

  • Adafruit DC Power BFF Add-On for QT Py visual preview

    Adafruit DC Power BFF Add-On for QT Py

    $7.95
  • Adafruit Feather 328P - Atmega328P 3.3V @ 8 MHz visual preview

    Adafruit Feather 328P - Atmega328P 3.3V @ 8 MHz

  • Adafruit Feather 32u4 Adalogger visual preview

    Adafruit Feather 32u4 Adalogger

Related groups

4 groups
10 I/Os PLC Module - CPU Arduino Nano (Optoisolated Output) visual preview

Arduino

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.

Boards · Arduino boards · 77 parts

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

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