Computercraft Microturbine Controller

--EyeDeck's microturbine RF generator controller

ecu = peripheral.find("EngineController")
cell = peripheral.find("powered_tile")
maxPower = cell.getMaxEnergyStored() * 0.975
minPower = cell.getMaxEnergyStored() * 0.025

function getState()
  local f = fs.open("state","r")
  local b = tonumber(f.readAll())
  f.close()
  return (b == 1)
end

function setState(b)
  state = (b == 1)
  local f = fs.open("state","w")
  f.write(b)
  f.close()
end

state = getState()

if (state == true) then
  print("Computer starting, microturbine running.")
else
  print("Computer starting, microturbine off.")
end

while true do
  power = cell.getEnergyStored()

  if (state == true) then --turbine currently on
    if (power > maxPower) then --enough power, turbine off
      print("Power high, turbine powering off.")
      ecu.setECU(0)
      setState(0)
    end
  else --turbine currently off
    if (power < minPower) then --not enough power, turbine on
      print("Power low, starting turbine.")
      ecu.setECU(4)
      setState(1)
    end
  end

  sleep(60)
end