@@ -16,13 +16,24 @@ OptionParser.new do |opts| end end.parse! +# A simple observer class which will receive updates from the meter +class SimpleObserver + def update(reading) + # Add all channels to get real figure + watts = 0 + reading.channels.each { |c| watts += c[:watts] } + # Print out measurement + puts "New reading received: #{watts} W" + end +end + # Create meter meter = CurrentCost::Meter.new(options[:port]) - -while true - reading = meter.latest_reading - if reading - puts "#{reading.channels[0][:watts]}W" - end - sleep(6) -end \ No newline at end of file +# Create observer +observer = SimpleObserver.new +# Register observer with meter +meter.add_observer(observer) +# Wait a while, let some readings come in +sleep(30) +# Close the meter object to stop it receiving data +meter.close \ No newline at end of file examples/simple.rb 73c5f8535170f478f8a1de44c312e67ec6f3d532 James Smith james@floppy.org.uk http://github.com/Floppy/currentcost-ruby/commit/1fca78304026a091d228d26c860f8f195f7b829f 1fca78304026a091d228d26c860f8f195f7b829f 2008-08-20T14:29:52-07:00 2008-08-20T14:29:52-07:00 Modify example to use an Observer 27b4145b5b2ff8f8d9530b6d2174cf83a8d0a1a1 James Smith james@floppy.org.uk