From a quiet 40 m evening to a 10 m opening, Airwave Scan turns your Pi into an HF weak-signal station you run from the couch or the car — the modes decoded on-device, the propagation read out in plain English, and every spot plotted.
The same open-source engines the modes were built on run right on the edge box, so decodes appear the instant a cycle completes — no laptop, no soundcard cables.
The keyboard modes decode channelized — every signal in the passband at once — but tap any trace on the live decode waterfall to focus one and read just its copy, with the receiver gain and squelch right there under your thumb.
PSK31 — a CQ pulled clean out of the 20 m passband
One tap runs an FT8 sweep across the HF bands and turns thousands of decodes into a sentence — then keeps the map and agenda honest about what's actually workable.
The read — thousands of FT8 decodes turned into a sentence
Tune the analog bands like a modern rig: a software VFO that slides inside the captured window with no dial-wedge, a live spectrum-and-waterfall panadapter, and the filters that pull a weak SSB or CW signal out of the noise.
The DX cluster, your logbook and the contest calendar all live in the app, so the interesting stuff comes to you instead of you hunting for it.
Spots come to you — live POTA activations and DX-cluster spots by callsign, freshest first; tap the dial to jump straight there
HF isn't only voice and data. Tune a slow-scan signal and watch the picture paint in line by line, then keep the good ones.
In the feed — every frame lands in Messages as it paints; tap for the full image
Turn on Maidenhead grid squares, the grayline terminator, a live MUF contour and a repeater layer — so a WSPR spot or an FT8 grid means something at a glance.
Add an RTL-SDR and an upconverter (or a native-HF SDR), point the app at the low bands, and let the decoders and propagation do the hunting.