PC to Microcontroller communication

The advent of new high-speed technology and the growing computer capacity provided realistic opportunity for new home controls and realization of new methods of control theory.
This project describes a new economical solution of communication system. The presented home system can be used for different sophisticated applications. The distant temperature data can be monitored through PC with help of the microcontroller.
The intelligent control software, which has been developed using high level graphical programming language (Visual Basic). A complete solution of a communication system is presented in this project.
Program: View attachment pc_mc.zip

i want the visual basic source code. can i get it from u?
plzz help me

I have provided the exe file to download. please contact me if you want the source code of VB.

J.Binu
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hi binu,


i already have a fm transmitter module designed for frequency range 88 to 108 M hz to trnasmit our voice is this enough for that fm trnsmitter module and can i use a conventional fm radio as the reciever??? please help me

I haven't yet tried this, but you can use it.

hi sir..
can u pls tell me what pins 9,11,12 and 13 are used for in the at89c2051?

That pins are not used so you can left it free.

I'm sorry sir..I don't understand..In the circuit diagram provided by you on the transmitter side, pins 9,11,12 and 13 of the 2051 are connected to the HT12E encoder pins.. Can you please explain what these connections specify?Is there any data transfer?

That four pin are data lines. The microcontroller will sent data to the Encoder through this pins.

sir i wanted to know why have u used 2 pins of port 3 and two of port 1?