When the module is not connected to / paired with any other Bluetooth device, the signal goes Low. The user can use it simply for a serial port replacement to establish a connection between MCU and GPS, PC to your embedded project, etc. The master module can initiate a connection to other devices. The slave modules cannot initiate a connection to another Bluetooth device but can accept connections. The Role of the module (Master or Slave) can be configured only by AT COMMANDS. The Bluetooth module HC-05 is a MASTER/SLAVE module. It uses a CSR Bluecore 04‐External single-chip Bluetooth system with CMOS technology and with AFH (Adaptive Frequency Hopping Feature). This serial port Bluetooth module is fully qualified Bluetooth V2.0+EDR (Enhanced Data Rate) 3Mbps Modulation with a complete 2.4GHz radio transceiver and baseband. The HC-05 Bluetooth Module can be used in a Master or Slave configuration, making it a great solution for wireless communication. HC‐05 module is an easy-to-use Bluetooth SPP (Serial Port Protocol) module, designed for a transparent wireless serial connection setup. Smart Phone with Bluetooth Terminal App.Bluetooth Module Interfacing with PIC16F877Aīefore starting this tutorial we should know the below topics.
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