This temperature plot for the lochan node shows that the snow – which was covering the solar panel has melted. This allowed the battery to charge again. The snow acts as an insulation layer to the Peli box – which is why the temperatures show little daily change before.
This plot of the Starte-of-Charge data for the lochan node shows that now the snow has melted off the solar panel it has begun to recharge. There was a slight error in the zero level as the node worked for part of that period.
This data shows that Sebastian Bader’s smart-charger has worked well and the lithium ion battery has performed as expected throughout the winter.
Temperature data from all nodes up to feb 26th 2018
Lochan node had dissapeared from the network once its battery had reached 0% charge.
Temperature data for winter 2018 showing lochan node’s stored data once it reconnected. It is clearly still under snow as there are no daily temperature swings
Looking at the incoming data – which is continuous from the Lochan node – I noticed the temperature flatlining since Nov 25th which shows the box is probably in snow now:
This temperature graph shows that the temperature of the lochan node is flat-lining. This normally indicates the box is snow covered and hence thermally insulated.
The battery charge – which was beginning to show signs of reduced solar charging (deeper dips) – also shows a sigificant drop. It is possible the solar panel – which is mounted on the ground – has some snow cover.
This plot shows the normal overnight dips and solar charging cycles becoming deeper. Oce the snow has settled the charge is dropping to around 70%.
Today’s summary plot shows we have been successful getting data from the mountain over a period of two years. This is the simple on-board temperature but it shows that the network is ready for deployments with more real-world sensors!
This is the long-term plot of temperatures obtained onboard the sensor nodes, It shows that data has been obtained almost continuously since summer 2015.
Photos from our visit in 2017
checking the hummock node in the rain – using a large, strong umbrella and adapted Peli case.
checking the peat nodes in 2017.
On the mountain we could run Ed’s new code to sniff the 6LowPAN radio traffic and plot it – this gave us a much easier way to see what had linked up:
Ed Crampin’s plot of 6LowPAN packets on the mountain near router2
This map made by Arthur’s new code shows the connectivity by asking each node for its route table.
The team in 2016 outside Loch Insh – minus Arthur who flew back for his graduation!
We managed to update the processors so we have more RAM/Flash while keeping the same sensors deployed in 2015. Sebastian’s solar powered lithium battery packs were installed in many nodes too!