Product details

Romeo BLE mini

Robot Control Boards and Computing Components

DFRobot

Romeo BLE mini

About this product

A compact Arduino-compatible robot controller combining an ATmega328P, Bluetooth 4.0 and two motor-driver channels. The current V2.0 uses a TB6612 driver and exposes interrupt pins for encoder-based control. Current ratings distinguish continuous operation, continuous pulses and single-pulse peaks.

Model
Romeo BLE mini DFR0351 V2.0
Category
Robot Control Boards and Computing Components, Components
Product stage
Commercial

Specifications & evidence

Source-backed claims. Configuration, workload and evidence type matter when comparing products.

Analog inputs

4 ports

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Analog Input Pins: 4

Bluetooth chip

TI CC2540

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
BLE chip: TI CC2540

Board dimensions

45 × 38.5 mm

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Size: 45x38.5mm

Bootloader flash usage

0.5 KB

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Flash: 32 KB (ATmega328P) of which 0.5 KB used by bootloader

Clock frequency

16 MHz

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Clock Frequency: 16 MHz

Digital i/o count

8 ports

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Digital I/O Pins: 8

Eeprom

1 KB

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
EEPROM: 1 KB (ATmega328P)

Flash

32 KB

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Flash: 32 KB (ATmega328P) of which 0.5 KB used by bootloader

Ide board selection

Arduino UNO

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Board selection: Arduino UNO

Microcontroller

ATmega328P

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Microprocessor: ATmega328P

Motor continuous current per channel

1.2 A

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Output current: 1.2A single-channel continuous drive current

Motor driver headline claim

2 × 2 A H-bridge

Manufacturer specification

Configuration: DFR0351; Headline summary does not override the separate 1.2 A continuous, 2 A continuous-pulse and 3.2 A single-pulse ratings. Exact current duration conditions must be observed.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
2x2A H-bridge motor driver

Motor driver revision

TB6612 replaces HR8833 in V2.0

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
V2.0 has upgraded its motor driver IC, it replaces HR8833 with TB6612 motor driver chip.

Motor peak current

3.2 A

Manufacturer specification

Configuration: DFR0351; Single-pulse peak condition; not a continuous current rating.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Start / Peak Current: 2A (continuous pulse) / 3.2A (single pulse)

Motor pins

D4, D5, D6, D7

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Motor Drive Pins: D4, D5, D6, D7

Motor start current

2 A

Manufacturer specification

Configuration: DFR0351; Continuous-pulse condition as printed by manufacturer; not the continuous 1.2 A rating.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Start / Peak Current: 2A (continuous pulse) / 3.2A (single pulse)

Pwm outputs

4 ports

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
PWM Digital I/O Pins: 4 (D3, D9, D10, D11)

Pwm pins

D3, D9, D10, D11

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
PWM Digital I/O Pins: 4 (D3, D9, D10, D11)

Radio range

30 m

Manufacturer specification

Configuration: DFR0351; Open area manufacturer claim.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
Transmission distance: 30m (open area)

Sram

2 KB

Manufacturer specification

Configuration: wiki-DFR0351; Official wiki gives 2 KB clearly; current store contains malformed text SRAM2: KB.

Romeo BLE Mini V2.0 - Compact Arduino Board for DIY Robotics | DFRobot Wiki
SRAM 2 KB (ATmega328P)

Usb connector

microUSB

Manufacturer specification

Configuration: DFR0351; Manufacturer specification; no independent measurement.

Romeo BLE mini - Small Control Board for Robot - Arduino Compatible - Bluetooth 4.0 - DFRobot
microUSB connector

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