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!
Photos from our visit 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:
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!
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!
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:
they also get a good MIL-spec-connector and new cable.
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.
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.
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.