CCBig Reactor Control

local REACTOR_AT = "back"
local SHUTDOWN_AT = 90.0
local ACTIVATE_AT = 10.0
local RF_MAX = 10000000     -- maximum power the reactor can store

print "Activating reactor control..."
local reactor = peripheral.wrap(REACTOR_AT)

if (not reactor) then
  print("No reactor found at ", REACTOR_AT, "!")
  return
end

local getStoragePercent = function()
  return reactor.getEnergyStored() / RF_MAX * 100.0
end

local printReactorState = function()
  print(string.format("Reactor %s at %3.2f%% storage", (reactor.getActive() and "enabled") or "disabled", getStoragePercent()))
end

local setActive = function(active)
  if (reactor.getActive() ~= active) then
    reactor.setActive(active)
    printReactorState()
  end
end

printReactorState()
local storage
while true do
  if (reactor.getConnected()) then
    storage = getStoragePercent()
    if (storage <= ACTIVATE_AT) then
      setActive(true)
    elseif (storage >= SHUTDOWN_AT) then
      setActive(false)
    end
  end

  os.sleep(1)
end