Grove Mesh Kit for nRF52840-MDK - Seeed Studio | Mouser
nRF52840-MDK Documentation
Particle Boron LTE - nRF52840 with Mesh and LTE Cellular Modem : ID 3998 : $69.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Playing with Mesh Networking on the Nordic nRF52840 @NordicTweets @electronutLabs « Adafruit Industries – Makers, hackers, artists, designers and engineers!