Arduino Bluetooth expansion board, Stackable Bluetooth Shield
The Bluetooth Shield Bluetooth expansion board inserted directly in the main control panel, Bluetooth communication capabilities can be extended. While the expansion board is stackable and can be stacked on the basis of the expansion board (such as Ethernet expansion board, rocker expansion board, key expansion board, etc.), and more features.
The Bluetooth module along with master-slave function, can be based on user needs freely through the AT command set, the default mode, baud rate 38400, paired 1234, the data is passed through the serial port and the main development board communication.
UNO only one hardware serial port, when you want to use the serial port back to fight the information to the PC while with serial control Bluetooth module will trouble debugging. The expansion module good solution to this problem, you can choose D0 ~ D7 any pin is connected to the module with the provided software serial library control module can be used outside the hardware serial IO hardware serial port can be used to debug information to communicate with the PC, back to playing. Onboard toggle switch module is used to manually set the control level for the AT mode. The jump cap can select module control pin is connected to the pin with IO software control or connected to the toggle switch hardware control.
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