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You are here: Home / Topics / RF module wireless data transmission without encoder and decoder using 8051.

RF module wireless data transmission without encoder and decoder using 8051.

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Microcontroller › 8051 › RF module wireless data transmission without encoder and decoder using 8051.

  • This topic has 29 replies, 16 voices, and was last updated 11 years, 11 months ago by sukhman.
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    Posts
  • December 21, 2010 at 6:17 pm #506
    Sanju Poudel
    Participant

    Hello friends. Can we design rf module transmitter and reciever device without using encoder and decoder. Can it be done by using 8051uC for encoder and decoder part. Thanks.

    December 23, 2010 at 9:12 am #5249
    Anonymous
    Guest

    I have tried the same thing with 434 mhz module and AT89C51 microcontroller and i also received the signals but there was time lag between the two signals.

    you can try it with another RF module.

    December 24, 2010 at 4:07 am #5256
    Sanju Poudel
    Participant

    Is there any way to solve this problem.

    December 25, 2010 at 12:19 pm #5259
    Engr. Mansoor Mirza
    Participant

    No 8051 is not able to encode or decode RF data…you have to use encoder and decoder chips like HT series….

     

    there are many encoder and decoders available in market 4-bit, 5-bit and 8-bit…

     

    8051 is not able to produce RF data……..

    December 25, 2010 at 12:33 pm #5262
    Anonymous
    Guest

    Hello! we dont get serial encoders here in nepal. So is there any other method for interfacing RF modules. I tried it with 8051 but random data appeared at the lcd. Thanks…

    December 25, 2010 at 2:36 pm #5271
    Engr. Mansoor Mirza
    Participant

    Which controller and RF module you are using???

     

    also elaborate some more about your Project!!!!

    December 28, 2010 at 8:58 am #5274
    Sanju Poudel
    Participant

    I am trying to build a rf module based wireless robocar using AT89C51 microcontroller and for this i have used 315/433 MHz ASK Module.

    December 28, 2010 at 9:05 am #5275
    Engr. Mansoor Mirza
    Participant

    Then u have to use RF encoder and decoder because u need a coded transmittion to do a specific task…

     

    for example if you transmitt a raw signal of rf that will drive your robot in forward position…. and now if u want to drive robot in reverse position then what will you do if you have no encoder??? !!!

     

    so you have to use encoder minimum 4-bit rf encoder that has 2^4 = 16 rf chanels you can use each chanel for each function…..

     

    in case of robot you need four operations…

     

    1. Move forward

    2. Move Backward

    3. Move Right

    4. Move Left

     

    these four can be achieved by using four bit encoder…..

     

    Raw RF transmission is not able to achive your goal. u need a reiable communication whose each bit is under your control!!! this can be achived only by using encoders…..

    December 28, 2010 at 9:10 am #5277
    Anonymous
    Guest

    Thanks for the help.

    Finally I will be ordering encoders & decoders from india; that might solve the problem.

    December 28, 2010 at 9:14 am #5278
    Engr. Mansoor Mirza
    Participant

    Thats gud decesion!!!

     

    what about using GSM for your Robo??

    December 28, 2010 at 9:53 am #5280
    Sanju Poudel
    Participant

    GSM will be our 4th year project. Waiting for the upcomming “GSM module interfacing with 8051” in EG.

    December 28, 2010 at 11:37 am #5281
    Engr. Mansoor Mirza
    Participant

    interfacing GSM with 8051 is simple u can control your robot using DTMF…..

    December 29, 2010 at 7:07 pm #5283
    Hasanur Rashid
    Participant

    I havent tried but i think RF modules takes manchester code as input and returns the same as output…If u can implement it…something may happen

    July 26, 2011 at 8:48 am #6519
    Pandey Ji
    Participant

    @Sanju Poudel

    Ask projectronix.com guys for encoder and decoder in Nepal.

     

    July 28, 2011 at 3:36 am #6540
    kamal acharya
    Participant

    @ sanju 

    Do you succeded or not ????

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