Arduino Comparison Guide
Uno or Pro Mini? Bluetooth or wireless? When it comes to Arduinos, there are a lot of choices. We've compiled every Arduino development board we carry, so you can quickly compare them to find the perfect one for your needs.
If you're not quite to the spec sheet stage yet, head over to our Choosing an Arduino for Your Project guide.
SparkFun RedBoard IoT - ESP32 Development Board
Quick take: The IoT RedBoard is an ESP32 WROOM-equipped development board that has everything you need in an Arduino Uno with extra perks like USB-C, Qwiic, and more.
Processor:
Dual-core Tensilica LX6
Clock Speed:
240 MHz
Flash Memory:
16MB
RAM:
520KB SRAM
Operating Voltage
2.3 to 3.6V
GPIO
26
Analog Inputs
8
DAC
2
PWM
6
UART
1
SPI
1
I2C
1 + Qwiic Connector
Connector
USB-C
USB-to-Serial
CH340G
LiPo Charger
Yes
Soldered Headers?
Yes
Shield Compatible
Yes
Form Factor
2.7 x 2.1 in. rectangle
Uno
Special Features
Wifi and Bluetooth
SparkFun Thing Plus - ESP32 WROOM
Quick take: The SparkFun ESP32 Thing Plus is the next step to get started with Espressif IoT ideations while still enjoying all the amenities of the ESP32 Thing.
Processor:
Dual-core Tensilica LX6
Clock Speed:
240 MHz
Flash Memory:
16MB
RAM:
32KB SRAM
Operating Voltage
2.3 to 3.6V
GPIO
21
Analog Inputs
6
DAC
2
PWM
16
UART
3
SPI
3
I2C
2 + Qwiic Connector
Connector
USB Micro-B
USB-to-Serial
CP2104/2N
LiPo Charger
Yes
Soldered Headers?
Yes
Shield Compatible
Yes
Form Factor
2.30 in x .9 in rectangle
Feather
Special Features
Wifi and Bluetooth
SparkFun Thing Plus - ESP32-S2 WROOM
Quick take: The SparkFun ESP32-S2 WROOM Thing Plus is a highly-integrated, Feather form-factor development board equipped with the 2.4 GHz WiFi SoC.
Processor:
Dual-core Tensilica LX7
Clock Speed:
240 MHz
Flash Memory:
4MB embedded SPI
RAM:
320kB SRAM
Operating Voltage
2.3 to 3.6V
GPIO
21
Analog Inputs
6
DAC
2
PWM
8
UART
2
SPI
4
I2C
2 + Qwiic Connector
Connector
USB-C
USB-to-Serial
CP2104/2N
LiPo Charger
Yes
Soldered Headers?
Yes
Shield Compatible
Yes
Form Factor
2.30 in x .9 in rectangle
Feather
Special Features
Wifi and Bluetooth
SparkFun ESP32 Thing
Quick take: Lots of features and powerful processor but software can be complicated. Many Arduino libraries not supported (yet).
Processor:
Tensilica LX6
Clock Speed:
240 MHz
Flash Memory:
4 MB
RAM:
520 KB
Operating Voltage
3.3 V
GPIO
28
Analog Inputs
18
DAC
2
PWM
16
UART
3
SPI
3
I2C
2
Connector
USB Micro-B
USB-to-Serial
FTDI FTS31XS
LiPo Charger
Yes
Soldered Headers?
No
Shield Compatible
No
Form Factor
2.32 x 1 in rectangle
Special Features
WiFi, Bluetooth, BLE
SparkFun ESP8266 Thing
Quick take: Low power and inexpensive WiFi development board. Separate USB-to-Serial board/cable is required for programming.
Processor:
Tensilica L106
Clock Speed:
80 MHz
Flash Memory:
512 KB
RAM:
96 KB
Operating Voltage
3.3 V
GPIO
11
Analog Inputs
1
DAC
0
PWM
11
UART
1
SPI
1
I2C
1
Connector
6-pin UART
USB-to-Serial
None
LiPo Charger
Yes
Soldered Headers?
No
Shield Compatible
No
Form Factor
2.18 x 1.02 in. rectangle
Special Features
WiFi, temperature and light sensors
SparkFun ESP8266 Thing Dev Board
Quick take: Low power and inexpensive WiFi development board.
Processor:
Tensilica L106
Clock Speed:
80 MHz
Flash Memory:
512 KB
RAM:
96 KB
Operating Voltage
3.3 V
GPIO
11
Analog Inputs
1
DAC
0
PWM
11
UART
1
SPI
1
I2C
1
Connector
USB Micro-B
USB-to-Serial
FTDI FTS31XS
LiPo Charger
No
Soldered Headers?
No
Shield Compatible
No
Form Factor
2.18 x 1.02 in. rectangle
Special Features
WiFi, temperature and light sensors
SparkFun ESP8266 Thing Dev Board with Headers
Quick take: Low power and inexpensive WiFi development board.
Processor:
Tensilica L106
Clock Speed:
80 MHz
Flash Memory:
512 KB
RAM:
96 KB
Operating Voltage
3.3 V
GPIO
11
Analog Inputs
1
DAC
0
PWM
11
UART
1
SPI
1
I2C
1
Connector
USB Micro-B
USB-to-Serial
FTDI FTS31XS
LiPo Charger
No
Soldered Headers?
No
Shield Compatible
No
Form Factor
2.18 x 1.02 in. rectangle
Special Features
WiFi, temperature and light sensors