Basic steps. Identify your wifi device (in my case wlp3s0), the enter monitor mode, use tcpdump to capture mac addresses and a short php script to switch between available channels:
sudo ip link set wlp3s0 down sudo iw wlp3s0 set monitor control sudo ip link set wlp3s0 up sudo tcpdump -i wlp3s0 -e -ttttnn > tcpdump.log sudo ./channel_changer.php
You can find out which $channels your device supports using
iw list (it's the numbers in the 'Frequencies' section). There are about 14 on older g/n devices and more on the 5G access points. I switch channel every 0.2 seconds (same as Kismet's default channel hop time) which seems to work fine.
I've made some graphs:
I'm still working on analysing an entire uninterrupted month to get some general statistics on wifi use around my area. Updates and code to follow.