1PCS HC-05 Arduino Wireless Bluetooth Transeiver RF Module Serial+4Pin Port line Description Package Included: 1. bluetooth transmission module, bottom board included, HC - 05 module *1 2. 6p 20 cm long dupont line *1 3. Android and Windows mobile serial testing software (self-download: http://pan.baidu.com/s/1pJv2e8N) Bluetooth module introduction: Bluetooth transmission module can enable you to get rid of using cable for a serial port device and realize wireless serial communication within 10 meters. Using the module doesn't require knowing the complex bluetooth bottom protocol. A few simple steps can get you to enjoy the convenience of wireless communication. Bluetooth transmission module has only 4 AT command. Respectively are communication testing, name changing, baud rate changing, matching password changing. AT command must be set from TXD, RXD signal pins, not via bluetooth channel. Device sending the AT command can be various types of MCU (for example, 51, avr, PIC, msp430, arm, etc.). It can also be a computer sending via serial port (PC serial port connected to MAX232 or USB serial port). 1. host module and sub-host module cannot change working mode, only a single working mode (host or sub-host) 2. the host module can only match HC06 sub-host module, host module cannot pair connected with each other, also, host module can't pair connected with computer, cell phone or other devices using bluetooth. 3. sub-host module can pair connected with computer and mobile phone using bluetooth, sub-host module cannot pair connected with each other. If your computer does not have bluetooth adapter, you can buy it from (address: http://item.taobao.com/item.htm?id=13724276178&). 4. AT command of the host module has no AT + NAME command comparing with sub-host module, other commands are the same 5. the average level of the interface of the host and sub-host module is 3.3V. It can be directly connected with various TTL level MCU with serial port (for 5V MCU, please serial connected with 1k resistor). Parameter set up can use MCU or USB serial port convertor in our store, or increase MAX232 computer serial port after circuit conversion. 1. Key common sense: TXD: sending end, usually stands for sender, normal communication needs to be connected to another equipment's RXD. RXD: receiving end, usually stands for receiver, normal communication needs to be connected to another equipment's TXD. During normal communication, TXD is always connected to RXD! self-sending and self- receiving: for normal communication, TXD is connected to another equipment's TXD, so if you want to receive the data yourself send, you need to connect TXD to RXD of the same device to test if the sending and receiving is normal. This is the simplest and fastest test method. When a problem arises, this test is performed to see if the product is flawed, also called loop back test. 2. Level logic: TTL level: normally, data is in binary, + 5V is equivalent to logic "1", and 0V is equivalent to logic "0", which is known as TTL signal system, and is positive logic RS232 level: for -12V - 3V, it is equivalent to logic "0", + 3V to + 12V is equivalent to logic "1", which is negative logic Product features: 1. core module use HC-05 sub-host module, interfaces include VCC, GND, TXD, RXD, KEY, bluetooth state pin (STATE), output low if not connected, high if connected 2. LED indicates the connection status of bluetooth, quick flash means no connectivity, slow flash means entering AT mode, double flash means bluetooth is connected 3. bottom board is equiped with anti-reversion diode, with 3.3V LDO, input voltage 3.6 ~ 6V, unpaired current about 30mA, paired about 10mA, input voltage no more than 7V! 4. interface level 3.3V, can be connected directly to various MCU (51, AVR, PIC, ARM, MSP430, etc.), and 5V MCU, no need for MAX232 and cannot connect with MAX232. 5. for open space, effective distance is 10 meters (power level CLASS 2), more than 10 meters is possible, but no guarantee on connection quality at this distance 6. after pairing, used as full duplex serial port, no requirement in knowing any any bluetooth protocol, support 8 data bits, 1 stop bit, can set odd-even check communication format, which is the most commonly used communication format, does not support other formats. 7. can enter AT command mode, set parameters, and query information by pull up 34 pins 8. small size (3.57 cm * 1.52 cm), production SMT factory, ensure SMT quality. It is protected by transparent heat shrinkable tube, dustproof and nice, and with certain antistatic effect. 9. can switch for host or sub-host mode and connect specified device by AT command 10. support standard baud rate between 4800bps~1382400bps Product application: After paring, it can be used as fixed baud rate serial port, so as long as the communication format of the device is in "fixed baud rate, 8 data bits, and no odd-even check", it can replace the original cable serial port with no need to modify the program, applications such as data acquisition, intelligent vehicle, serial port printer, outdoor matrix display control, etc. Pairing with computer: suitable for computers and devices communicating via bluetooth serial port, using method is the same with serial port Pairing with mobile phone: suitable for mobile phone and devices communicating via bluetooth serial port, using method is the same with serial port Paired with the bluetooth host: suitable for two devices communicating directly through bluetooth serial port, such as MCU-MCU, cable erial port to MCU, etc., using method is the same with serial port Flexible use: Baud rate change, because the receiver and the sender can choose their own baud rate, when the data is in small amount, it can be used as the baud rate convertor. 5. How to connect the bluetooth module to a computer (in valid mode) Use the following as an example: First, power up the bluetooth transmission module, LED flashes at the monment, open "my bluetooth location", click "search devices located within the effective range," System will search for bluetooth devices, the default device name is "linvor" (if modified, the modified name is the name of the device, such as "jiayuanelectron"), double click or right-click to choose "add a bluetooth device", Enter pairing password (the default is "1234"), Click "next", if the password is correct, then the computer will establish a connection with the transmission module, if have not installed bluetooth serial device before, then the system will automatically install the driver and generate a virtual serial port Click on configuration, select the appropriate COM port, I can only choose com5 here. The port will be serial operation ort on PC, eg. I am com5 here, when open the port, the quick flach LED will be changed to double flash, then you can use the bluetooth module as fixed baud rate serial port of the computer, only it is wireless. Delivery details Delivery details - Orders are usually shipped within 24hours after payment has been cleared. Orders made on Saturdays, Sundays, and holidays will be processed on the next business day and will be shipped within 24 hours. - Shipping charges include postage, handling, and packaging of shipments. -all replacement item will ship via express mail shipping with tracking number.may take 1-10 days to reach,sometimes,it depend on how fast the custom of clearance. -we ship worldwide excluding po. box,pls make the correct ebay address -TO FIND YOUR TRACKING NUMBER THROUGH EBAY - go to 'My eBay' on the top right of the page, and click 'Purchase History' on the dropdown menu. 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