The issue with most SBC board I tried the onboard wifi is either not support by OpenWRT or can not do Mesh mode
Maybe in the furture i will look at the ESPRESSObin and MACHIATObin
My focus for CJDNS will be on AES-NI on x86 based board like a ATOMIC Pi/ Intel NUC J4005 (will include CJDNS with my LibreMesh X86 OpenWRT build)
then use for test Mesh (build Libremesh from source for my test boards below, they will not run CJDNS, the device above witll run CJDNS and act as gw)
Nano Pi NEO2 with USB wifi (USB Ralink 5572 Wifi 2.8/5.8Ghz - support Mesh mode)
Cisco Meraki MR24/MX60 (PowerPC architecture, with Atheros 2.4/5.8 Ghz PCI wifi)
Netgear EX6100v2/EX6150v2 Wifi Extenders (IPQ401x with ATH10 wifi 2.4/5.8Ghz)