Beetle is a extremely the smallest Arduino leonardo board with Atmel AtMega32u4. 16MHz clock time and has expanded amounts of interfaces: 10 digital pins, 5 analog pins and 4 pwn pins. DFR0282

Small development kit with ATmega32u4 microcontroller. The board has 6 power, 6 analog and 17 digital pins, which makes it have similar capabilities to the Arduino UNO. Compatible with Arduino. Adafruit 3677

The platform is based on the Atmega 32U4 microcontroller with a default Arduino compatible bootloader, 26 O / I ports and a microUSB port. Polol 3145

Bluno - BLE with Arduino Uno

Beetle BLE is another milestone in wearable electronics device area based Arduino Uno, which makes DIY users have more options in the project design. It is fully compatible with Bluno in instructions and procedures, supporting Bluetooth HID and ibeacon modes. And it not only supports USB programming, but also wireless programming method. DFR0339

DFRobot (DFR0221)

At the Feather M0\'s heart is an ATSAMD21G18 ARM Cortex M0 processor, clocked at 48 MHz and at 3.3V logic, the same one used in the new Arduino Zero. This chip has a whopping 256K of FLASH (8x more than the Atmega328 or 32u4) and 32K of RAM (16x as much)! This chip comes with built in USB so it has USB-to-Serial program & debug capability built in with no need for an FTDI-like chip. Adafruit 3179

DFRobot DFR0355 is a versatile development board that combines GSM, GPRS, and GPS functions into one compact device. With the ATmega32u4 microcontroller and integrated SIM808 module, this board is ideal for applications such as vehicle tracking, remote communication, satellite positioning, and IoT projects. Built-in power-saving features and battery power make it an excellent choice for applications requiring low power consumption and reliable operation in various conditions. DFRobot DFR0355

Plate from the Adafruit Feather series equipped with an ATmega32u4 microcontroller and a small prototype surface (5x7). The chip contains 32KB flash memory, 2KB RAM memory and built-in USB support. The plate is compatible with Arduino. Adafruit 2771

The board is equipped with ATSAMD21 microcontroller with ARM Cortex-M0 core and SPI Flash memory, GPIO pins and RGB diode. Adafruit 3505

Development kit with ATSAMD51J20 microcontroller with ARM Cortex M4F core. It is clocked at 120 MHz, has 1 MB of Flash and 256 KB of SRAM. There are 6 SERCOM interfaces on the board. SparkFun DEV-14713

Evaluation kit with Sparkfun Artemis Bluetooth 5.0 module designed on the basis of the Feather kit. It has a USB C. The board also has a USB-UART converter, a microphone and a JTAG debugging connector. Artemis has support in the Arduino IDE. SparkFun WRL-15574

Evaluation kit with Sparkfun Artemis Bluetooth 5.0 module designed on the basis of the Arduino Mega kit. It has a USB C. The board also has a USB-UART converter, a microphone and a JTAG debugging connector. Artemis has support in the Arduino IDE. SparkFun DEV-15442

Board with the ATmega328 microcontroller from the AVR family, there are 20 I/O lines, 6 PWM channels, 6 analog inputs at the user\'s disposal. SparkFun DEV-15123

Development kit with ATSAMD21E microcontroller with ARM Cortex M0+ core. The chip can be clocked at 48 MHz, has a built-in 256 KB of Flash memory and 32 KB of SRAM. The module has a Qwiic connector. SparkFun DEV-15423

Development kit with SAMD21G18A microcontroller with ARM Cortex M0+ core and LoRa RFM95W radio communication module. SparkFun WRL-15836

IoT development board the size of Arduino, equipped with an ARM Cortex-M3 processor (STM32F205) and a Wi-Fi communication module (with an integrated antenna and uFL connector). SparkFun DEV-13321

Evaluation kit with Bluetooth 5.0 Sparkfun Artemis module. Equipped with a microphone, kmaers and accelerometer. SparkFun DEV-16828

Evaluation kit with Bluetooth 5.0 Sparkfun Artemis module. Equipped with a microphone, kmaers and accelerometer. Himax HM01B0 camera included. SparkFun KIT-17071

Adafruit 1500