https://www.theverge.com/2018/1/3/16845006/roomba-wifi-map-home-coverage-irobot

Roomba, the robotic vacuum, is gaining an indoor Wi-Fi mapping feature in its iRobot app later this month. The Wi-Fi Coverage map feature means Wi-Fi-enabled Roombas will be able to produce a map of indoor signals, which show weaker areas and signal dead zones. Some Roomba models can be controlled remotely using Wi-Fi, so the feature is handy in terms of understanding where the robot might be out of range for remote control.

iRobot says when users start a cleaning job, the Roomba will collect Wi-Fi signal information as it goes and produce a map. Users will be able to swap between the signal map and the app’s Clean Map feature, which displays where the robot has already cleaned. The Wi-Fi map should be useful for people to figure out if a room might have a spotty connection, and if they ought to reposition their router, or get a new one or a range extender.