how to interface a rf tranmitter and receiver to microcontroller AT89S52?

[hemanth]

im working on a project in which i need to interface rf module with 8952 for wireless communication.. pls help me in this regard

[Amrith]

Hi Hemanth,

Which RF module are you using ? What interface it has (UART ot SPI). If you are using 433Mhz RF modules you con interface Transmitter Tx pin(Dout) to Tx pin of 89C52 & Receiver Rx pin(Din) to Rx pin of 89C52.You need two microcontrollers for your application, one at transmitter side & other at receiver side.

Post your ffurther doubts.

[AJISH ALFRED]

 

Hi Hemanth,

You can use TWS434 as rf transmitter module and the RWS434 as rf receiver module.

You need two 89C52 microcontrollers, one at transmitting board and other at the receiving board. You may also require encoder and decoder ICs, like HT12E and HT12D.

You can refer the following link having details about a similar project

http://www.engineersgarage.com/electronic-circuits/dc-motor-control-circuit-wireless-rf

 

We are not sure about the kind of help you are expecting. Please share more details about the project and your doubts aswell.

 

[samir rahate]

hey i have been wrking on interfacing the tx rx 434 module with mc 89C52 but the thing is i hav all of my ports occupied with functions and hav only the serial port to transmitt the 12 bit data, i m hav problems with deciding the baudrates for transmission and reception….

can any1 plz help….

i need this wrk done within a week or so….

so plz suggest me with sum solutions…..

[Shrikant]

hey..if am not wrong, a baud rate of 2400 should work perfectly.

[saima ahmed]

can HC11 wireless transfer module be used for room automation system? or what is the other better RF module that can be used in wirelessly controlling room appliances like light, fan, door, window, curtain?

[Ashutosh Bhatt]

you need encoder-decoder chips and 433 MHz transmitter receiver pairs. but in this case you need some IO port pins to be free to get decoded data.

if you dont have any pins left then two options

1) use FSK transreceiver both sides that can be directly connected to Tx Rx pins

2) use serial bluetooth module at both sides

[saima ahmed]

What is xy-mk-5v??

[saima ahmed]

@ A M Bhatt

why do I need encoder-decoder chips with 433MHz RF module if I use PIC uC?

[Author]

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