A mesh network of printed circuit boards (PCBs) including a first PCB coupled to a second rigid PCB by way of an interlocking connection is provided. The interlocking connection has a degree of freedom that allows the first and second PCBs to form a twist angle between each other; the interlocking connector configured to provide electrical coupling between active components disposed in each of the first and second PCBs. A method of forming a substrate fabric including a mesh network as above is also provided. Further provided is a method of activating the mesh network of printed circuit boards as above.