Wireless Bluetooth HC-05 Host Serial Transceiver Module with button Slave and Master For Arduino
1, the core module from the module using the
leads interface includes VCC, GND, TXD, RXD, KEY pin , pin-out Bluetooth
connection status (STATE), not connected to the output low , after
connecting the output high
indicate Bluetooth connection status , Bluetooth connection means no
flash , slow flash indicates enter AT mode , double flash indicates
Bluetooth is connected and open ports
3, bottom set anti-reverse diode with 3.3V LDO, the input voltage is
3.6 ~ 6V
, when unpaired current of about 30mA, the pairing of about 10mA,
the input voltage must not exceed 7V!
interface level is 3.3V, you can directly connect a variety of SCM (51,
AVR, PIC, ARM, MSP430 , etc. ), 5V microcontroller can also be connected
directly , not through without MAX232 MAX232!
to 10 meters effective distance ( power rating of CLASS 2), more than
10 meters are possible, but do not make this connection to ensure the
quality of distance
after the pair when using full-duplex serial port , without having to
know any Bluetooth protocol support 8 data bits, 1 stop bit, parity can
be set communication format , which is the most common communication
format , not support other formats.
7, can be pulled 34 feet into the AT command mode to set parameters and query information
small size (3.57cm * 1.52cm), chip production plant to ensure the
quality of the patch . And set transparent shrink tube , dust and
beautiful, and there is some anti-static capabilities.
9, can be switched via AT commands as master or slave mode , the device can be connected via AT commands
10, support from the Inter- standard baud rate 4800bps ~ 1382400bps
Note: This module does not suitable for IOS system.
TXD: the sender, usually expressed as its sender, the normal communication must be connected to another device RXD.
the receive side, generally expressed as the receiving end of their
normal communication to another device connected to TXD.
ARDUINO HC-05 BLUETOOTH
3 TX 510 ohm---^^^--- -> RX 3.3V level
2 RX <- ---^^^---510 ohm TX 3.3V level
SoftwareSerial gpsSerial(2,3); //(rxPin,txPin) of Arduino
Photo Credits: some images and data are form Internet web resource.