Added the pulse-in node code. Added simple debouncing logic to
discrete-in (note: this implementation may be badly affected if there
is a lot of very fast bouncing.
Added input scaling function and averaging of multiple readings for
noise reduction to the analogue input node.
Added the ‘sanity check’ read of the digital input pin to the timer
callback in the discrete input node
Coerce the currentState to always be numeric & use === tests
Catch the first spurious interrupt when x.value is undefined
Add more debug output
Add a second timer to get the first message out. This still fails at
node-RED startup when the node is not activeLow
Further attempts to get the initial message working. Added activeLow
property. Output messages now include topic. Better help text. Change
name to discrete-in
