RF Modules are popularly used in the remote control system. In Quadcopter, Robot remote control, Industrial remote control, telemetry and remote sensing etc. Get more details hereRF module interfacing tutorialRF Module:RF Module means Wireless Radio Frequency Module. RF module consists of two units. One Transmitter unit and another is Receiver unit. Basically, RF modules are used to building a wireless connection between two points.
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The program given below is the HC-05 Bluetooth Module Interfacing with PIC16F877A. This process is quite different from others since we are going to use android mobile to control and communicate with PIC16F877A. Here the Bluetooth module acts as an interface between our mobile and PIC16F877A board.
We can easily communicate over 300-500m distance through RF module. In this tutorial we are using RF Module at the 433Mhz frequency and it supports baud rate 9600. Although didn't try this. In this tutorial, I will use baud rate2400.
We will use USART to make connection between pic18f2550 and HC-06. So, here is an important thing Baud Rate. This bluetooth module supports 38400 Baud Rate. Actually i don't have much knowledge about Baud Rate. All i know, it's a Symbol rate and differs from bit rate.
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Higher baud rate makes higher speed of transmission and connection speed. I had tried to understand it clearly from wikipedia, but i failed to completely understand. If you would like to know about Baud Rate, please try these links.