tempAutomation.rb

#!/usr/bin/env ruby
# Tom Eklöf, tom@linux-konsult.com
# Control a heat pump with a TellStick and usb termometer (tdtool and temperv14 have to be installed)

require 'date'

####	Settings	####
interval = 1800					# Number of seconds we loop for temp logging and adjustments
tdunit = 4					# tdtool --list gives you the correct unit number
temptarget = 22.0				# Our target temperature
pump_skip_hours = [ 0, 1, 2, 3, 4, 5, 6, 7, 22, 23 ]	# Don't run the pump on these hours
####	/Settings	####

### 	Functions	####
def actionlog( action="", unit="" )		# Log our actions
	open('/root/action.log', 'a+') do |a|
		time = DateTime.now
		a.puts "#{time}	#{action}	#{unit}"
	end
end

def get_temp
	%x{/root/bin/temperv14 -c}.to_f
end
### 	/Functions	####


# Loop forever
loop do
 time = DateTime.now

 # dont run the pump at nights but log the temp
 hour = DateTime.now.hour
  pump_skip_hours.each do |sleep|
  hour = DateTime.now.hour
   if hour == sleep
    livingroom = get_temp			# Get Temp and log it
    open('/root/templog.csv', 'a+') do |t|
     t.puts "#{time}	#{livingroom}"
    end
    sleep interval
    hour = DateTime.now.hour
    redo
   end
  end



 livingroom = get_temp				# Get Temp and log it
 # Log the temperature
 open('/root/templog.csv', 'a+') do |t|
  t.puts "#{time}	#{livingroom}"
 end

 if livingroom <  temptarget
  %x{/usr/bin/tdtool --on #{tdunit}}
  actionlog "on", "#{tdunit}"
 else
  %x{/usr/bin/tdtool --off #{tdunit}}
    actionlog "off", "#{tdunit}"
 end

 %x{/root/bin/plotTemp.gnuplot}			# Run an external gnuplot script to publish a temp graph
 sleep interval
end