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Using RLP 434 and TLP 434 modules on microcontroller without noise

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ucluxxx

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Hello,

i making project about communication data using frequency radio using 2 mikrokontroller. A side of the microcontroller using RLP 434 and TLP module 434 while the microcontroller side B also uses the same module.
I wanted to ask how to RLP on either side of it so that there is no noise.

please someboy help me.....
 

Re: RLP 434 and TLP 434

@kspalla:
can you give an example about it please??
 

RLP 434 and TLP 434

i presume in this case the are no multiple channels i.e single frequency for both case A and B.
if A is transmitting B can not transmit called contention and lead to noise. B should listen first and if free then start Tx, standard 802.11 protocol.
 

Re: RLP 434 and TLP 434

mmm...

I'm still confused with your explanation ....

Can more be clarified again?
 

Re: RLP 434 and TLP 434

mmm ....

Can you give a C program??
 

Re: RLP 434 and TLP 434

ucluxxx said:
mmm ....Can you give a C program??
Hmmm...so this was the actual requirement...
 

Re: RLP 434 and TLP 434

yes....

please help me....
 

Re: RLP 434 and TLP 434

you need manchester encoding to make it reliable. OR
You can use a hardware encoder/decoder pair (look at holtek 12e & holtek 12d).

Without some kind of encoding, it may work, but it will not be reliable. (sometimes it works, other times it does not)

have a look at my post here:


Sorry, I have no C code to offer.
 
for this problem maybe you can add a procedure in the receiver program to eliminate the noise. for example, you can lomot the data that you receive will only the data that comes after 2 charachter like "*" and "#". so you make a filter to reduce the data that your receiver should display. after the receiver confirm this "code" then the data that your receiver read after that should be the data that your transmitter send. and you can display it then.
my friends have already test it and it's worked.
 

for this problem maybe you can add a procedure in the receiver program to eliminate the noise. for example, you can lomot the data that you receive will only the data that comes after 2 charachter like "*" and "#". so you make a filter to reduce the data that your receiver should display. after the receiver confirm this "code" then the data that your receiver read after that should be the data that your transmitter send. and you can display it then.
my friends have already test it and it's worked.

what happens when the data is rejected because of noise? These cheap modules do not work well using the microcontroller uart, no matter how the code is written.
If you want to use the uart, pay the extra $ and go for a more expensive module like a zigbee or a nordic.
 

hi ctownsend, the character of "*" and "#" send first every time we want to recieve data. wich means the other data that is not the same as * and # will be rejected (the noise), but after the receiver receive the * and # charater, the next step is receive the data, that means the real data won't be rejected. to make it simple lets make an example,

"I want to make a private party. to keep my party private i need to make a limitation for the guest. so the proximity is the guest has to bring the invitation letter and his/her name listed on my invited list, if the two condition was fullfill then the person must be my guess"

same happen here, if the data coming after * and # that should be the data that i want to receive. hope can help.
 

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