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Interfacing RF ASK 433mz Transmitter & Receiver with Atmel AT89C52

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krishnamurthy991

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Hello All,

Iam trying to interface Atmel 89c52mc with RF 433mz Transmitter & Reciver.
Problem is as follows.
1. When connected TX of mc directly to the Transmitter iam, no data is received at the receiver side. i have set the baudrate to 1200.

2. when i connect the Transmitter and Receiver to and HT640 encoder and supply 5v to pin 0 of the encoder, iam able to receive the same 5v at the decoder HT648L.

i want to use TX,RX pin of 89c52mc for transmitting & Receiving Data.
pls send me some detail doc(ckt diagram) on how to connect the transmitter and Receiver with mc. how to trouble shoot these problems ?

pls help
 

What Tx and Rx chips (433mhz RF) are you using?
 

Thanks for the reply.. Below is the spec of rf & tx given by the vendor.
 

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  • 433_mhz_txrx.zip
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Always use these type of modems with HT12E(Encoder) and HT12D(decoder). These chips will look after (manchester)encoding and decoding.

For more details and circuit look at the datasheet of those ic.
 

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