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CC8520 design will transmit but not recieve

Other Parts Discussed in Thread: CC8520, CC2590

Hey there, 

I have the Purepath wireless eval kit, and have been using it to send audio, successfully. 

Now I have implemented the chip into our own design using the pcb style antenna. The design is identical on the sender and the receiver in terms of the CC8520 and surrounding electronics.

I can get the Evaluation kit sender to pair with the Evaluation kit receiver and send audio using my custom configuration.

I can get MY transmitter to pair with the Evaluation kit receiver and send audio, using a custom configuration.

However I can't get MY receiver to pair with the Evaluation kit sender at any distance, including right up close.

I've checked everything, I disabled the range extender because I don't have it, changed the output format, set it to auto pairing with fixed network id, made sure it was looking for the correct ID of the transmitter, the protocol versions are identical. Everything about the configuration works between my TX and the Eval RX, but when I change the settings for my RX, they won't pair.

Have I done something wrong? Do I need a different layout / schematic for the RX circuit?

Is there a set troubleshooting list I can go through for when it isn't pairing?

I'm set to auto-pair, there's no pairing button, and when I look at the LED of MY RX, it is flashing "Alone" mode no matter what I do.

Cheers

~David

  • Hi David, 


    From an RF perspective, all devices are both Tx and Rx (it's an multi-cast protocol with acknowledgment).

    Can you try to switch master and slave role on your boards to rule out any HW issues?

    Regards, 
    Kjetil

  • Hey there, 

    I actually got the receiver talking. I think it was a case of a) proximity - I'm going to need an external antenna for the receiver and the booster chip for the transmitter. Also I had to re-program because I hadn't included a button interface so I had to reset the pairing. 

    At any rate, after I got over my initial frustration I got it working. Thanks for replying. 

    I will use the CC2590 on the transmitter using the PCB copper track antenna and an external receiver antenna - does this sound like it will work well?

    Cheers

  • Hi David, 

    Glad you got it working. 


    Using CC2590 only on one end, you will create a asymmetrical link and not get the full benefit of the additional output power. Like I mention, both sides of the link operates both as Tx and Rx even though audio is only going in one direction. Having CC2590 only on the Audio Tx side is better (due to how the protocol behaves), but how well this will work depends on your range criteria. 

    Regards, 
    Kjetil