I managed to get my temperature monitor back up and running. It seems to be more stable than a year ago.
As a reminder I'm POSTing data from a Arduno WiFi connected to my local network which is sent to my Apache web server.
I have a PHP script that processes the data and puts it into a mySQL db which is then polled when the relevant test area page is accessed.
The next task is to graph the data to observe trends. I currently only see the last entry and time stamp.