A meshlocal is a neighbour-to-neighbour network allowing direct inter-citizen secure communications without involving any intermediate third-party service. It is based upon the installation in close households of a meshlocal router.
A meshlocal router is simply an unexpensive wifi router able to run the OpenWRT free and open-source operating system.
How is it used
Each meshlocal router is just plugged in the base household Internet router ("ISP box") with an Ethernet network cable.