SAMR21-xpro
Thanks Martine, as suggested i used the RADVD tool and the raspberry assigned global addresses to all my RIOT nodes. However, when i try to perform a coap request from the raspberry, it gives me back the error :
root@raspberrypi:/# coap-client -m GET coap://[fd00:1:2:3:584a:1056:7cd8:1aa2]/.well-known/core
v:1 t:CON c:GET i:e6f3 {}
Jul 07 11:32:45 CRIT coap_send_impl: Network is unreachable