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Forum Post: CC1000 in receive mode

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Hello,

I'm trying to stablish a RF link between two CC1000, one acting as transmitter and the other one as receiver. Transmitter part is working correctly but I'm not able to receive correct data at RX part. I'm sending the preamble 0xAA 8 times, then 4 bytes of SOF (0x22BB) and then 1 byte of data (just for testing). In transmitter CC1000 I'm sending this sequence all the time.

In the receiver I'm always looking for the preamble, then the sof if I find the preamble and then I read the data byte. I've read that if you are in RX mode and your transmitter is off you only receive noise. Hence, the demodulator will demodulate noise and this is what you see on the DIO pin (Manchester mode, which is my case). Ok, that happens to me. 

But if I switch on my transmitter and I get close enough to the receiver (very close!) it always receive the byte 0x2A all the time. It doesn't matter if I change SOF or data byte, it always says I'm receiving 0x2A (not only the data byte, but every byte I receive). If I separate RX and TX or I switch off TX, it begins to receive random data bytes...

I don't know where to start looking for the problem here.

Any idea would be highly appreciated, I really need to get this to work as soon as possible. 

Thanks a lot. 


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