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

[Sanju Poudel]

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.

[Anonymous]

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.

[Sanju Poudel]

Is there any way to solve this problem.

[Engr. Mansoor Mirza]

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……..

[Anonymous]

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…

[Engr. Mansoor Mirza]

Which controller and RF module you are using???

 

also elaborate some more about your Project!!!!

[Sanju Poudel]

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.

[Engr. Mansoor Mirza]

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…..

[Anonymous]

Thanks for the help.

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

[Engr. Mansoor Mirza]

Thats gud decesion!!!

 

what about using GSM for your Robo??

[Sanju Poudel]

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

[Engr. Mansoor Mirza]

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

[Hasanur Rashid]

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

[Pandey Ji]

@Sanju Poudel

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

 

[kamal acharya]

@ sanju 

Do you succeded or not ????

[Author]

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