b5a5262ef8RX tone detection is working, but it's causing a Queue Assert failure which results in the entire bloody thing crashing? I believe the RX TX functionality needs to be split into two different tasks. Progress :). Another sad note. The frequency calculation is eating a tone of time. I needed to reduce the sample rate to 6kHz to keep up. I haven't tested with noise, but from the sig gen it seems reliableeven at -110dBm. I don't know what the voice FM equilvents are.