DEMMON1

DEMMON1 is the first wireless network prototype developed by EMMON project. It was first demonstrated at the project review meeting at ISEP in Porto on 7th December 2010.

DEMMON1 is, as far as we know, the largest implementation of a wireless sensor network in Europe. It consists of 303 nodes, measuring temperature, humidity and light level.

The sensor nodes, placed on glass supports, were aligned with an axis that was 5o from the north-south direction and were given GPS co-ordinates.

Tests, which involved changes of environmental parameters, and progressive introduction of active nodes were carried out in order to investigate the wireless network response.

When a node selected at random was either covered by dark opaque material reducing the amount of available light, or when it was exposed to heat gradient from an electric heater, DEMMON1 responded promptly, giving the reading in the corresponding node.

Scaling up tests were carried out by staged activation of nodes in groups of 100. DEMMON1 did not show any noticeable change of performance depending on the number of active nodes.

EMMON project is now developing DEMMON2, a real life implementation of DEMMON1.

For further information please follow the links below. To obtain updates about DEMMON2 development please use our contact link from the menu on the left.


There were 3 network patches (see image above) with grid densities as follows:
  • patch1 - blue: denisty 100x100 cm
  • patch2 - yellow: density 100x80 cm
  • patch3 - red: density 70x60 cm
Patch 1 and patch 2 overlapped.


DEMMON1 being demonstrated at project review meeting


A view of DEMMON1 prototype.


Wireless sensor node based on a Telos B device


EMMON project team after successful demonstration

DEMMON1 Posters


Network
architecture
Middleware

Command &
control
Communication
protocol

Dimensioning
simulation
Theoretical
performance