Long term sensing

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.

A look at solar charging

This plot of the state-of-charge for the Lochan node shows that the charging is working very well – with a high average. It will be interesting to see the onset of autumn later.

 

This plot shows battery charge current (count is proportional to mA). The charge controller only charges the battery when it is below a certain level.

 

zooming into the plot shows daily spikes of charge

Quadcopter imaging

in summer 2017 we imaged several areas to produce Digital Elevation Models (DEM) to investigate their use in repeat surveys. The 3D Robotics Solo was equiped with a Mapir camera:

This shows the quadcopter flying an imaging mission (top right in the sky)

We used the Tower app to control imaging missions

2017 fieldwork

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.

Photos from the 2016 IoT feshie deployment

The Estate's conservation buggy is very useful when we have a pile of awkward items to carry.

The Estate’s conservation buggy is very useful when we have a pile of awkward items to carry.

This is the 2016 node in its protective laser-cut "inner" box.

This is the 2016 node in its protective laser-cut “inner” box. You can see our new processor board with on-board radio and the optional lighter green CC1120 radio board on top of the MountainSensing v2 pcb which handles power and /I/O.

 

Packet sniffing and route plotting

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

Ed Crampin’s plot of 6LowPAN packets on the mountain near router2

This map made by Arthur's new code show the connectivity by asking each node for its route table.

This map made by Arthur’s new code shows the connectivity by asking each node for its route table.

2016 deployment a success!

 

 

The team in 2016 outside Loch Insh

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!

2016 PCBs

The team have been very busy making new PCBs for the final deployment in two weeks! The MS2 boards were even helped along by ECS’s new pick-and-place machine – but incredibly the Munjtac processor boards were all hand-built!

pcbs for 2016

preparing solar panels

in 2016 we are testing small solar panels to charge the batteries until the snow covers them. I have just sealed them using a silicone rubber:

potting solar panels

they also get a good MIL-spec-connector and new cable.

New processor board

Our “muntjac” processor/radio board is now being tested on the original ms1 interface board. It uses a CC2538 and CC1200 as its radio and has flash storage for readings. Here you can see it sitting on top of the board – which is possible as it has the same connections as the z1.

our muntjac processor board on our ms1 board

our muntjac processor board on our ms1 board

The Muntjac is very much a shortcut for us to use an ARM core – we don’t actually use the 2.4GHz radio for example.