https://communities.intel.com/thread/62908
MQTTプロトコルを使えとのこと
You can run a Pub/Sub client in Arduino using MQTT (ex. Arduino Client for MQTT « knolleary and then have another one on the NodeJS side (mqtt) receiving the data that doing something with it.
Arduino MQTTライブラリ
http://knolleary.net/arduino-client-for-mqtt/