WiFi channel through API

[peteruithoven]

This week I was having an issue at a location (Leonardo DaVinci exhibition in Utrecht) where a lot of WiFi devices were active including 4 Doodle3D WiFi-Boxes and 4 iPads. Many times the connection got lost. A very busy WiFi channel seemed to have caused this behaviour. I switched from channel 11 to channel 6 and all problems where gone. I think there's no easy way yet to change this using the Doodle3D app or through the API. So if you know how you can login to the wifibox using ssh (email us for the password) and edit the file /etc/config/wireless. Change option channel '11' to option channel '6'.

I think it would be very useful if we added a API call for this.
Original: Doodle3D/doodle3d-client#264