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Resetting Waspmote Plug & Sense! with an external magnet
13. Resetting Waspmote Plug & Sense! with an external
magnet
Waspmote Plug & Sense! can be reset with an external magnet, with no contact. If one node stops working or if a
defective behavior is detected, it would be costly to uninstall the node to bring it back to laboratory. This feature
allows the network manager to reset the node in a quick and easy way.
The hardware consists of a reed switch connected to the Waspmote reset line. When the user gets the magnet
close to the reed-switch, the reset is activated. When the user moves the magnet away, the reset line is released
(the external LED will blink) and Waspmote executes the bootloader first and then, the setup function. After the
setup, it will continue with the loop function. Next pictures show the right way to reset the node using an external
magnet, first moving it closer, and then moving it away.
Figure: Moving the magnet closer to the node
Figure: Moving the magnet away from the node