bluetooth serial module HC05 master and slave
1, the core module from the module using the HC-05, leads to interface includes VCC, GND, TXD, RXD, KEY pin, Bluetooth connection status leads to the foot (STATE), not connected to the output is low, connect the output high
2, led indicate Bluetooth connection status, Bluetooth connectivity means no flash, slow flash indicates into AT mode, double flash indicates Bluetooth is connected and turned on port
3, bottom set anti-reverse diode with 3.3V LDO, the input voltage is 3.6 ~ 6V, unpaired when current is about 30mA, paired about 10mA, the input voltage must not exceed 7V!
4, the interface level 3.3V, you can directly connect a variety of SCM (51, AVR, PIC, ARM, MSP430, etc.), 5V microcontroller can also be directly connected, it can not pass withoutMAX232 MAX232!
5, open to effective distance of 10 meters (power rating of CLASS 2), more than 10 meters are possible, but do not do this from the connection quality assurance
6, when paired with full-duplex serial port to use, without having to know any Bluetooth protocol that supports 8 data bits, 1 stop bit, parity can be set to the 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
8, compact size (3.57cm * 1.52cm), factory chip production, quality assurance patch. And sets transparent shrink tube, dust and beautiful, and there is a certain degree of anti-static capabilities.
9, can be switched via AT commands for the host or slave mode, you can specify a device connected via AT commands
10, support from 4800bps ~ 1382400bps standard baud rates between
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