Survey a site and hunt interference

The channels view says what is on each Wi-Fi, Bluetooth and 802.15.4 channel, how loud it is and how crowded it is, which is the answer to where to put your own network rather than a picture of the problem.

Heatmap export keeps the span as readings and writes a page that zooms and pans, with time of day, frequency and decibels under a crosshair. A row is the loudest each bin reached rather than a snapshot, so a transmitter that fired once at three in the morning is still there in the morning, and moving the dial widens the picture instead of clearing it.

The band walk in the scanner settings steps the dial past the span, holds on what it hears or logs it and moves on, with a find you do not care about marked as ignored. Interference that only happens when nobody is watching is the reason any of this runs unattended.

$ waveshark --tune 2437 --span 20000 --channels