Arduino boards are a type of development board that allow you to build and program your own electronic projects. They consist of a microcontroller, which is a small computer on a single chip, and a variety of input and output pins that you can use to connect sensors, actuators, and other electronic components.
Arduino boards is that they are based on open-source hardware and software. Open source means that the designs, schematics, and source code of the Arduino boards are freely available for anyone to access, use, modify, and distribute. This open nature encourages collaboration, innovation, and learning within the Arduino community.
DFRduino Bluno Nano made by DFRobot is a arduino nano compatible board with Bluetooth features
Specifications
On-board BLE chip: TI CC2540
Wireless Programming Via BLE
Support Bluetooth HID
Support AT command to config the BLE
Transparent communication through Serial
Upgrade BLE firmware easily
DC Supply: USB Powered or External 7V~12V DC
Microcontroller: Atmega328
Bootloader: Arduino Uno
Compatible with the Arduino Uno pin mapping
Size: 53x19x12mm(2.09×0.75×0.47″)
Weight: 20g