Daughter Board Design Reference
For PCB design clearance, please refer the file ms14_components_placement.
It includes all components placement and export in 1:1 ratio. Developer can import it to drawing tool such as Adobe Illustrator to get the exactly dimension to design.
Enclosure clearance for mother board design: Enclosure Clearance 1:1 ratio
PCB Layout Example
Hardware Source for Dragino's module can be found at This Link