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DFRobot Bluetooth Microcontrollor Selection Guide
Product Name
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
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Product Name
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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