HC-05 Bluetooth module is an easy-to-use Bluetooth SPP (Serial Port Protocol) module, designed for transparent wireless serial connection setup. The HC-05 Bluetooth Module can be used in a Master or Slave configuration, making it a great solution for wireless communication. This serial port Bluetooth module is fully qualified for Bluetooth V2.0+EDR (Enhanced Data Rate) 3Mbps Modulation with a complete 2.4GHz radio transceiver and baseband. It uses the CSR Bluecore 04 single-chip Bluetooth system with CMOS technology and with AFH (Adaptive Frequency Hopping Feature).
The Bluetooth module HC-05 is a MASTER/SLAVE module (the default factory setting is SLAVE). The Role of the module (Master or Slave) can be configured by sending AT commands. The slave modules cannot initiate a connection to another Bluetooth device but can accept connections. Master modules can initiate a connection to other devices.
The HC-05 Bluetooth module can be used to simply establish a serial port connection between MCU and for example GPS, to a PC or to an embedded system.
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Typical 80dBm sensitivity
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Up to +4dBm RF transmit power
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3.3 to 5 V I/O
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PIO (Programmable Input/Output) control
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UART interface with programmable baud rate
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On-board integrated antenna
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Default Baud rate: 9600 (8N1)
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Autoconnect to the last device at power on as default
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Permit pairing device to connect as default
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Pairing pin code: 1234 as default