Thank you. I was struggling with the authorization when launching the page. Assigning application role to the Web Application solved it. 

I just got a wifi module esp8266 and want to try some data logging.  The weather station is a nice start to learn how to integrate IRIS and all these inputs arduino can  generate. 

Very good explanation! It worked for me. Thank you!
Have you ever tried to send over network instead of using the cable?