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nipun
Joined: 13 Dec 2005
Posts: 47
Helped: 2
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 18 Oct 2006 7:37 need help with rf based remote control |
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| im trying to make a remote control with atmega16 and a standard tx/rx rf module(333 MHz).im using usart to send and recieve data to these rf modules at 200 baud rate.problem is its not working properly ,sometimes its giving output and sometimes its giving a different o/p.problem is not wth µc simulation is showing perfect results.what can be the problem.plz help
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18 Oct 2006 7:37 Ads |
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vibeeshpv
Joined: 19 Oct 2006
Posts: 51
Helped: 2
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19 Oct 2006 8:25 Re: need help with rf based remote control |
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| wot type of rf module u using.also there may be some problem of dcshifting..use an antena...and try it .
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nipun
Joined: 13 Dec 2005
Posts: 47
Helped: 2
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24 Oct 2006 5:30 Re: need help with rf based remote control |
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| its ask based rx/tx pair,thx for ur help
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budhy
Joined: 21 Oct 2006
Posts: 836
Helped: 185
Location: Indonesia
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24 Oct 2006 5:51 Re: need help with rf based remote control |
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| Do you use FSK?
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arnab.bhaumik
Joined: 20 Sep 2006
Posts: 73
Helped: 2
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27 Oct 2006 16:30 Re: need help with rf based remote control |
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hi
some months ago i developed a remote control using tx rx pair,
first of all these modules are damm slow, those modules are contains a 2222 encoder ic (in tx part)and anoter decoder ic in the receiver module.
data transfer rate are damm slow . you can check it . first send a byte from transmitter and after that wait for almost 300ms(test case) then send a 0xff byte
or 0x00 byte. check that at receiver side using a scope. after some sampling you will get the idea of timing.
also these modules are one is latch type and another is momentary.
so also check that ( 2222l for latch and 2222m for momentary) and program accordingly
arnab/vu2bpw
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nipun
Joined: 13 Dec 2005
Posts: 47
Helped: 2
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10 Nov 2006 6:07 Re: need help with rf based remote control |
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| i use ask.i know these r slow so i use it around 200 baud rate.i need it for remote control only so its ok,but the problem is it some times works n some times doesnt,is there a problem of interference?
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