USB Serial Communication Continuous

[pic-ker]

Few post before you said you didn't use the RF for now.. is this still true?

If you receive always different things, it sounds like a baudrate problem to me... dpending your config fuses settings, hardware it may ruine your whole life..

try a simple serial comm before adding the USB.

Its true, I tested the TX/RX using a wire initially and there were absolutely no problems with the baudrate or noise etc

Now that I have attached the RF modules I get errors..its probably because this module uses ASK

Ideally the module should not require CRC bits, what I mean is if you send a '1' you should get a '1'

Im trying another data link from here:
www.cappels.org/dproj/LCRFLINK/LCRFLINK.htm

i'll try it and let you guys know...

[skimask]

Its true, I tested the TX/RX using a wire initially and there were absolutely no problems with the baudrate or noise etc
Now that I have attached the RF modules I get errors..its probably because this module uses ASK
Ideally the module should not require CRC bits, what I mean is if you send a '1' you should get a '1'
Im trying another data link from here:
www.cappels.org/dproj/LCRFLINK/LCRFLINK.htm
i'll try it and let you guys know...

Most of those RF modules use ASK. And generally, they don't need CRC bits (that's all up to you), but what they do need is manchester encoding (aka bi-phase encoding) to keep the internal data slicer from losing it's mind.
Search for and check that thread I mentioned earlier and you'll see. Basically, you end up cutting your data rate in half by changing all the 1's to '10' and 0's to '01'. Sounds silly but it works great.

[pic-ker]

Most of those RF modules use ASK. And generally, they don't need CRC bits (that's all up to you), but what they do need is manchester encoding (aka bi-phase encoding) to keep the internal data slicer from losing it's mind.
Search for and check that thread I mentioned earlier and you'll see. Basically, you end up cutting your data rate in half by changing all the 1's to '10' and 0's to '01'. Sounds silly but it works great.

I got my RF module to work...I was using the +VCC from the USB port to power the receiver and that was causing some continuous ripple

I used a battery supply,connected the grounds,used a 0.01uF decoupling cap and now it works..

Thank you guys for your suggestions...
I will post the complete project once the VB.net Code is complete..