This patch adds a command line utility to interface with the WattsUp
power meters (https://www.wattsupmeters.com/)
Signed-off-by: Roberto Riggio<roberto.riggio@create-net.org>
git-svn-id: svn://svn.openwrt.org/openwrt/packages@26380 3c298f89-4303-0410-b956-a3cf2f4a3e73