1. The core module USES hc-05 to extract the interface from the module, including VCC,GND,TXD,RXD,KEY pin and bluetooth connection STATE. The output is low without connection and high after connection
2. Led indicates bluetooth connection status, flash means no bluetooth connection, slow flash means AT mode, double flash means bluetooth is connected and the port is opened
3. The base plate is equipped with an anti-reverse diode with 3.3v LDO, and the input voltage is 3.6-6v. The current is about 30mA when unpaired, and about 10mA when paired.
4. interface level 3.3v, can be directly connected to a variety of microcontroller (51, AVR, PIC, ARM, MSP430, etc.), 5V microcontroller can also be directly connected, without MAX232 can not go through MAX232!
5. The effective distance of open space is 10 meters (power CLASS 2), and it is possible to exceed 10 meters, but the connection quality of this distance is not guaranteed
6. After pairing, when the full duplex serial port is used, it does not need to know any bluetooth protocol, supports 8-bit data bit, 1-bit stop bit, and can set parity communication format, which is also the most common communication format and does not support other formats.
7. You can set parameters and query information by dragging 34 feet into AT command mode
8. Compact size (3.57cm*1.52cm), factory patch production, ensure patch quality.And a transparent heat shrinkable tube, dust beautiful, and has a certain anti-static ability.
9. Switch to host or slave mode by AT command, and connect the specified device by AT command
10. Standard baud rate from 4800bps to 1382400bps is supported

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