The Environmentals page shows you graphs of historical temperature, pressure and humidity as delivered by the TPH module.

Below the Environmentals heading is a line that will only appear when you have more than one TPH on your network. Most people wont, but I do, and it provides three drop-down menus where you select which TPH to graph.

The next line contains a date selector, a timescale drop-down, optionally a “mam” drop-down (see below), and a graph size drop-down.

The date selector shows the time and date of the right-hand edge of the graphs, and three buttons. The button with the less-than symbol moves the date backwards in time by a little less than the timescale, the greater-than button takes you forward in time by the same, and the double greater-than button takes you to “now.” If you’ve gone backwards or forwards in time using the less-than or greater-than buttons then whenever you return to this page it will show the same graph. If you use the double greater-than “now” button, when you return you will always see the up-to-date graph, as it is now.

The timescale drop-down lets you choose the interval of time to show, and can range from 1 hour to 2 years. Timescales up to 4 days shows you real-time data, as in the image above. Timescales from 1 month and higher show you minimum, average and maximum daily data, as in the following image.

You’ll note there is another drop-down after the timescale drop-down. This is the “mam” drop-down, short for Minimum, Average, Maximum. This lets you select from those three options as well as All, as in this image.

The All option for the Environmentals page is very crowded and is less preferable than choosing one of the other three, however, I’m including it here purely for illustrative purposes. The minimum value is shown in red, average in green, maximum in black. This is daily data, not real-time.

The longer scale graphs are great for spotting trends. You can clearly see the southern hemisphere summer and winter in the temperature graph.

The final drop-down is to select graph size. The ones in both images are small. Chose whatever size best suits your needs.

All the options on this page are stored as part of your browser’s cookie and will be used each time you visit this page. The graph size you select sets the graph size across all pages that show graphs.

And for complete transparency, the gap in the 1 year graphs above is because my Outside TPH was retired after we stopped developing for the old hardware revision on which it is based. But then I thought, why waste a perfectly good module just because it’s on old hardware. So now I have my old, faithful Outside TPH back in business and two of the latest TPH’s inside. TPH heaven.