RFM69 Library Question sendWithRetry

[chalupien]

Looks like I load up a fresh example Gateway and Node and it works except the sendWithRetry command always returns false. Every time. Even if I increase the waiting time to receive an ACK. What is happening? The Gateway sends an ACK. But the Node never responds, just keeps sending new packets...

[Felix]

It's because it never returns true:

Code Select Expand

      if (ACKReceived(toAddress))
      {
        return true;
      }

So something else is wrong, check everything again, settings, frequency etc.

[chalupien]

I reloaded the latest library and uncommented the library where it tells me how long the ACK took. Looks like its working better... If I change the bit rate, this starts to fail.

Should I be waiting longer than 20ms for an ACK if I lower the bit rate?

[Felix]

If you lower the bitrate you have to change more than 1 register, and you may have to wait more for longer messages.