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v8.6
Resetting Waspmote Plug & Sense! with an external magnet
The magnet is made of neodymium. It is a special, high-power magnet. We only advise to use the magnet Libelium
provides. The user must be careful because the magnet is so powerful that it can get stuck to metal objects. Besides,
the magnet must be kept away from electronic devices like PCs, batteries, etc, since they could be damaged or
information could be deleted.
It is not mandatory, but highly recommended to consider this feature when designing the project. Every Plug &
Sense! node comes with the hardware to allow the contacless reset, but the magnet is optional, an accessory. It is
highly recommended to purchase one magnet (one unit is enough for many nodes). The user should design the
software in a way the node can be reset if things go wrong. Remember that laboratory tests are always needed to
validate the feature before your final deployment.
When the node is already deployed in the field, and for instance it is installed in a traffic light, this feature can be
used to reset the node easily, as it is shown in the diagram below, where a technician uses a pole with the magnet
attached in one side.
Figure: Resetting a Plug & Sense! node with a pole and magnet