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David Prentice
09/04/12 03:14
Read: 901 times

#188225 - How effective is the 433MHz
Responding to: Michael Karas's previous message
Those 433MHz modules are fairly cheap. The 2.4GHz NRF24L01+ modules are even cheaper.

In theory, 433MHz should give a better range. However any RF comms requires a lot or error detection / correction for a reliable link.

So as well as the Manchester encoding, you need an extensive software layer. The NRF24L01+ (and the 8051 versions) handles the channel, pipe, CRC, ACK, power, ...

In practical terms, which would be more reliable ?
< 20m in a cluttered office
< 20m in a cluttered factory floor.
< 100m in a clear field.


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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