I'm creating a message board or log book in SharePoint. I would like to send PI Notifications to SharePoint as an entry in a List ( the list of messages ).
Thats technically possible using Custom Web Service Channel. You will have to write a SOAP/REST service that will send data from PI to your Sharepoint App.
Please refer to the blog written Marcos Vainer Loeff
Developing a Custom Web Service for Use With PI Notifications
Retrieving data ...