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:
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!
Router2 – which links our network over the mountains to the peat research zone had fallen over in high winds. Olivia and Emma successfully repaired it on a cold day in November:
Winter was setting in and soon travel up to the sites will be very difficult. A replacement box/node/battery linked up the peat zone into the network once this was installed. Data which had been stored on peat nodes started to flow back to the server every hour (as expected) via four network hops!
In September Arthur and Kirk went to reprogram the nodes with bug fixes.
We had reduced the RAM usage of the code and removed some bugs. It also allowed us to recover readings from “lost” nodes and recharge the batteries.
Last year a laser scan of part of the mountain side, to establish a base line. So this year we have performed a second laser scan to compare to the first one. This data will be analysed later to discover how the rock face has moved in the last year.
In order to cover the study area over the ridge – we placed this sensor node in a strategic place so it passes traffic across. By this time the packets have come 3km up to the mountain then 1km across to this node – then another 600m down to the peat area.
All this with 868MHz radios running IPv6 (6LowPAN) and CoAP to gather the data!
Arthur – our superb intern team member this summer has worked very hard to get the CoAP layer working for the system and has now seen it in action on the mountain.
We’ve just installed a new IP camera at the estate. This will give us regular images so it’s possible to see what the weather is like, to help plan field trip days, and give information about the snow fall and melt throughout the year.
There are key “hops” in the network which require a node to route traffic. These “relay nodes” are key to the links and have a tripod to raise their antenna slightly – which is a higher performance antenna too. Before leaving for the winter we pegged it to the ground to test its strength.