Product Name

DFRobot Bluno

Beetle ESP32 Microcontroller

DFRobot Beetle BLE

Romeo BLE

Romeo BLE mini

Bluno Nano

Figure

SKU

DFR0267

DFR0575

DFR0339

DFR0305

DFR0351

DFR0296

Microcontroller

ATmega328

ESP32

ATmega328

ATmega328P

ATmega328P

ATmega328P

BLE Chip

TI CC2540

ESP32

USB

TI CC2540

TI CC2540

TI CC2540

Power supply interface

USB or DC2.1

USB

USB

USB

USB

USB

USB Powered or External (V)

7 - 12

3.5 - 6.5

6 - 8

5 - 23

6.5 - 10

7 - 12

Operating Voltage (V)

5V

3.3V

5V

5V

5V

5V

Bootloader

Arduino UNO

Firebeetle ESP32

Arduino UNO

Arduino UNO

Arduino UNO

Arduino UNO

Flash(KB)

32

16M

32

32

32

32

SRAM(KB)

2

520

2

2

2

2

Analog pins

6

4

4

8

8

8

Digital pins

14

4

4

14

4

12

UART

1

1

1

1

0

1

I2C

1

1

3

3

1

1

SPI

1

1

1

1

0

1

Download Mode

Micro USB, Wireless

Micro USB

Micro USB, Wireless

Micro USB, Wireless

Micro USB, Wireless

Micro USB, Wireless

Maximum transmission distance (M)

30

30

30

70

30

50

Arduino UNO Compatible

√

×

√

√

×

×

Master/slave switch

√

√

√

√

√

√

Bluetooth passthrough

√

√

√

√

√

√

Bluetooth 4.0 wireless program

×

×

√

√

×

√

iBeacons

√

√

√

√

×

×

Bluetooth HID

√

×

√

√

√

√

App Control

√

√

√

×

√

√

Dimension(mm)

75*54

35*34

28.8*33.1

94*80

45*38.5

53*19

Weight (g)

50 g

12 g

10 g

62 g

25 g

17 g

Key Features

can directly connect with app, no pair need

Integrate a Dual-Core ESP-WROOM-32 module. Support MCU and Wi-Fi &Bluetooth dual-mode communication. V shaped gilded I/O interface, can be sewn on clothes directly.

Mobile BLE APP Connection Support. V shaped gilded I/O interface, can be sewn on clothes directly.

Mobile BLE APP Connection Support. Two way H-bridged Motor Driver with 2A maximum current and wireless socket.

Mobile BLE APP Connection Support. 1.2A single-channel continuous drive current and 3.2A current H-bridge Motor Driver interface

Can upgrade BLE firmware via USB, integrate with mobile Bluetooth into a star network without pair

Add to Cart

Add to Cart

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Product Name

Bluno Mega 2560

Bluno Mega 1280 (Discontinued)

Bluno M3 - (Discontinued)

Bluno M0 Mainboard (Discontinued)

FireBeetle Board-328P with BLE4.1

FireBeetle ESP32 IoT Microcontroller

Figure

SKU

DFR0323

DFR0306

DFR0329

DFR0416

DFR0492

DFR0478

Microcontroller

Mega2560

ATmega1280

STM32 F103RET6

NUC123ZD4AN0

ATMEGA328P

ESP32

BLE Chip

TI CC2540

TI CC2540

TI CC2540

TI CC2540

TI CC2540

ESP32

Power supply interface

USB or DC2.1

USB or DC2.1

USB or DC2.1

USB or DC2.1

USB

USB

USB Powered or External (V)

/

/

/

/

/

/

Operating Voltage (V)

5V

5V

3.3V

5V

3.3V

3.3V

Bootloader

Arduino Mega2560

Arduino Mega2560

Bluno M3

Bluno M0

Arduino Pro or Pro Mini

FireBeetle-ESP32

Flash(KB)

256

128

512

68

32

16M

SRAM(KB)

8

8

64

20

50

520

Analog pins

16

16

11

6

6

5

Digital pins

54

54

39

31

14

10

UART

4

4

5

1

1

1

I2C

2

2

1

1

1

1

SPI

1

1

2

1

1

1

Download Mode

Micro USB, Wireless

Micro USB, Wireless

Micro USB, Wireless

Micro USB, Wireless

Micro USB

Micro USB

Maximum transmission distance (M)

30

30

30

30

30

50

Arduino UNO Compatible

√

√

×

×

×

×

Master/slave switch

√

√

√

√

√

√

Bluetooth passthrough

√

√

√

√

√

√

Bluetooth 4.0 wireless program

√

√

√

√

√

×

iBeacons

√

√

√

√

√

√

Bluetooth HID

√

×

√

√

×

×

App Control

√

√

√

√

√

√

Dimension(mm)

100*53

100*53

68.7*31.3

68.5*53.4

58*29

24*53

Weight (g)

45 g

45 g

30 g

30 g

20 g

24 g

Key Features

Mobile BLE App Support. Compatible with all Arduino Mega pins. Flash capacity: 256KB (4k for bootloader)

Mobile BLE App Support. Compatible with all Arduino Mega pins. Flash capacity: 128KB (4k for bootloader)

All 39 Digital I/O Pins can enable External Interrupt. 5 Serial Port.

The only ARM Cortex-M0 Arduino Microcontroller that supports 5V standard logic level. IIS interface supply. Wav files play & record support.

Support KISS connection (approach connection). Support Bluetooth 4.1 multiple device cascade (maximum:4)

Integrate a Dual-Core ESP-WROOM-32 module. Support MCU and Wi-Fi &Bluetooth dual-mode communication.

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