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Michael Karas
09/03/12 23:26
Read: 791 times
Beaverton Or

#188221 - Are You Willing....
Responding to: ???'s previous message
Are you willing to drop the HT12E and HT12D parts from your design?

It is possible to simply drive the 433MHz transmitter with a port pin that is modulated by MCU code and then decode the output from the 433MHz receiver that is connected in such manner to generate two interrupts to the target MCU. One interrupt generates off the rising edges of the received signal and the other interrupt generates off the falling edge of the received signal.

A successful transfer scheme like this should have the transmitted signal encoded with a Manchester pattern so that the average signal level has no net DC bias.

With the typical low cost 433MHz transmitter and receivers that I have used there has been good success of sending data at rates of 500 bps over respectible distances of up to 150 feet or more.

Michael Karas

List of 14 messages in thread
sample source code 433Mhz rf remote C soure code       Vaka Kiran Kumar      09/03/12 06:13      
   Which RF module are you using? ... provide a link, please      Richard Erlacher      09/03/12 10:33      
   Eh??      Andy Neil      09/03/12 14:13      
      RF remote      Vaka Kiran Kumar      09/03/12 22:04      
         Are You Willing....      Michael Karas      09/03/12 23:26      
         A Manchester Modulation Scheme      Michael Karas      09/04/12 01:14      
         Manchester RF Receiver      Michael Karas      09/04/12 01:22      
         Manchester RF Transmitter      Michael Karas      09/04/12 01:27      
            How effective is the 433MHz      David Prentice      09/04/12 03:14      
               Half Duplex      Michael Karas      09/04/12 11:34      
         Where's the link to the datasheet?      Richard Erlacher      09/04/12 08:38      
            please fined teh atatched zip      Vaka Kiran Kumar      09/05/12 04:42      
               Please provide access to your C: drive      Erik Malund      09/05/12 07:10      
               Hacking activated        Per Westermark      09/05/12 08:21      

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