I've made some updates to the webSockets lib ws.js

I checked my dataserver running on 192.168.0.6 port 8080 and this nodejs part works as expected (it even gets the initial data sent on ws.on('open') perfectly, and also saves data from other sources too). Maybe I have time to check your code in the WebSocket library, like I mentioned above I think it dies there (or maybe it needs an acknowledge message from dataserver to finish).
I cannot confirm that there is a timeout which ends the blocking (waited 15mins or more).

Tanks for your clarification about onInit.