DP TECHNOLOGIES HC05 Bluetooth Module for Arduino

1 leads to 6 feet: EN / VCC / GND / RXD / TXD / STATE (Bluetooth status leads to the foot, is not connected to the output low, after connecting output high) 2 with the connection status indicator, LED flash means no Bluetooth connection; LED flashing slowly that enter the AT command mode 3 onboard 3.3V regulator chip, the input voltage DC 3.6V-6V; When unpaired, current of about 30mA (because LED lights flashing, the current state of change); After successful pairing, the current is about 10mA 4 Interface level 3.3V, you can directly connect a variety of microcontroller (/51/AVR/PIC/ARM/MSP430 etc.), 5V microcontroller can also be directly connected. Directly connected to the microcontroller serial port, not through the MAX232 chip! 5 open area effective transmission distance of 10 meters, over 10 meters are possible, but do not guarantee the quality of the connection 6. After successful pairing, can be used as a full-duplex serial port. Do not need to know anything about the Bluetooth protocol, but only supports 8 data bits, 1 stop bit, no parity communication format. This is the most common communication format that does not support other formats! 7 Press the key to give the Bluetooth module is energized to enter AT mode, set parameters and query information 8 Switch between master and slave mode via AT commands 9 Default baud rate is 9600, Default passkey is 1234, Default name HC-05 10 Module is protected with transparent shrink tube WIRING PINOUT: VCC: positive power supply GND: power supply is negative RXD: Receive side, the Bluetooth module receives data sent to the other device; TXD terminal normally connected to the other device to send TXD: sending end, the Bluetooth module to send data to other devices; RXD terminal normally connected to other devices receiving EN: Enable, then you need to enter AT mode 3.3V