This is the new Arduino Uno R3. In addition to all the features of the previous board, the Uno now uses an ATmega16U2 instead of the 8U2 found on the Uno (or the FTDI found on previous generations). This allows for faster transfer rates and more memory.
Logic level conversion circuit; RF-BM-S01 low power consumption Bluetooth module; Default baud rate: 9600 8N1; Soc: CC2540; 2.4GHz ISM band; GFSK; 40 channels, 2 MHz, 3 fixed broadcast channels, 37 adaptive auto frequency hopping data channels; Physical layer Bluetooth RF dual mode device; Output power adjustment (-23dBm~4dBm); High gai receiving...
The module (MicroSD Card Adapter) is a Micro SD card reader module, and the SPI interface via the file system driver, micro controller system to complete the Micro SD card read and write files. Users can directly use the Arduino IDE comes with an SD card to complete the library card initialization and read-write