Simple command line util to send 802.11 beacons with Channel Switch Announcements
ESP's appear to honour 802.11 beacons containing CSA even if they are not connected to the AP sending the beacon.
To try out given wireless interface is wlan1:
airmon-ng start wlan1
git clone https://github.com/nabovarme/beacon_spammer.git
cd beacon_spammer
make
./beacon_spammer wlan1mon -n 1000 -r 10 -c [CSA channel]
while beacon_spammer is running, ESP's in the range of the box running beacon_spammer gives: "switch to channel [CSA channel]" (filter with wlan.tag.number == 37)
