BT Shield (Master Slave)
BT shield V2.2 is a serial port Bluetooth module (with master and slave mode) breakout board, it’s compatible with Arduino and IFlat-32, it can directly plug on Arduino/IFlat-32 board, use UART port for communication with Arduino/IFlat-32 or PC.
|PCB size||53.3mm X 47mm X 1.6mm|
|Power supply||5V DC|
|Communication Protocol||UART/Bluetooth 2.0|
|Input Voltage VH (Target Voltage = 3.3V)||3||3.3||3.6||VDC|
|Input Voltage VH (Target Voltage = 5V)||4.5||5||5.5||V|
|Input Voltage VL:||-0.3||0||0.5||V|
UART Multiplexer (For free UART connection setting)
You can use the jumper to connect the TXD and RXD pins of HC-05 to D0, D1, D4~D7 pin of Arduino.
When using the connection as Figure 3, the BT shield connects to the ATMega328 chip on board.
When using the connection as Figure 4, the HC-05 connects with the FT232RL chip, and the FT232RL connect to PC by USB. Whit this configuration you can use the serial software on PC to control or configure the HC-05 module.
Except the 2 configurations above, you can connect the TXD and RXD to any other pins from D4-D7, and using the software-serial library to control the HC-05 module.
The Mode Set Switch is connected to PIO11, when it is pushed to CMD and powered on, the HC-05 enter command mode, HC-05 module can receive and response AT command in this mode. When it is pushed to DATA and powered on. The HC-05 enters data mode and will not accept AT command.
When power on and disconnect the port, states LED blinks 1time/2s ; when the module connect and open the serial port, states LED blinks 2times/s.