I'm also trying to get the plugin to work on a raspberry pi running raspbian Jessie, but I am getting stuck at getting a PSK. after I type in: >$ coap-client -m post -u "client_identity" -k "MY-GATEWEY-KEY" -e '{"9090":"IKEA"}' "coaps://MY-IP:5684/15011/9063" I get the following reponse: > v:1 t:CON ...