Turn it down!

After setting off a MyJoulo logger just before Christmas, it’s already finished its week of temperature logging; this holiday is definitely going way too quickly!

The website seems a bit temperamental but after a few failed attempts to log on and several stalls loading and processing the data, it came up with a pretty unsurprising result:


Yep, the thermostat is definitely set on the warm side.

Still, it was interesting to get another vote on what the temperature actually is, having previously got conflicting readings from several other thermometers. (It seems I should recalibrate the thermostat back up a degree!) It was also interesting to see it showing the outside temperature, which must be based on the address details used to send the logger in the first place. Both indoor and outdoor readings seem to match what I was expecting:


Over all I definitely like the concept of re-usable data logging to give personalised advice, and MyJoulo is a pretty good beta. Aside from some confusion about what colour it flashes when it arrives, the logger seems to work well. At the end of the week you just plug the logger into a USB port to get a simple text file containing all the temperature data, and a device serial number.

The web site seems to have more teething problems but it did eventually work. I had assumed you need to log on to analyse the data but luckily they must link the serial number to your details since I wasn’t able to log on at all, even after resetting the password. I guess that I won’t get someone else’s details if I upload the file again after the logger has been reused but I have a copy of the data file just to see what happens in a few weeks!

The other slight disappointment was the actual analysis, which seems very basic. You can add your annual heating bill, but it might have been useful to get people to enter meter readings at the start and end of the week. It would also be nice to take account of temperatures in different rooms- maybe by sending a different number of loggers based on registration questions about where the thermostat is, or whether there are thermostatic radiator valves for example. Or you could just use a single logger in different locations over a few weeks instead. Maybe this is something that will develop over time.

The logger is now back in the return envelope ready to send off for its next mission.

Early Christmas Joulo

After a tweet from @andysc I ordered a free Joulo logger– well free stuff is always hard to resist! Plus, since the Hursley CurrentCost craze (also Andy’s fault?!) it’s seemed like the first few days of monitoring are the most valuable and that, in most cases, you could just borrow a monitor. So there was a nice surprise in the post today- a logger and a freepost envelope to send it back after a week. Neat. Much better idea than a load of energy monitors gathering dust in peoples cupboards.


After a bit of confusion/user error about what colour the flashing button was, it’s now sat on top of the thermostat recording the temperature. (Apparently it’s supposed to arrive flashing orange, which is clearly not green like it is after pressing the button, doh!) It’ll be very interesting to see what it comes up with at the end of the week, especially after I had a collection of thermometers all showing different values while trying to figure out if the temperature on thermostat was right the other day!

To be continued!