Charger

-- Redstone Energy Cell Charger
-- Top ender chest is for Empty cells
-- Bottom chest is for Full cells

p = peripheral.wrap("front") -- Cell management

function checkCell()
  -- See if a cell is in front of the turtle, and if it is charged.
  print("Checking for cell")
  cellPresent = turtle.detect()
  if cellPresent == true then
        print("Cell present")
    if p.getEnergyStored("front") == p.getMaxEnergyStored("front") then
        print("Cell fully charged - swapping")
        swapCell()
    else print("Cell not fully charged")
    end
  end
  if cellPresent == false then
        print("No cell detected, placing new cell")
        swapCell()
  end
end

function getEmptyCell()
  -- check if there's a cell in inventory, if not, grab one
  if turtle.getItemCount(1) == 0 then turtle.suckUp() end -- pull cell from depleted chest
  return true
end

function swapCell()
  print("Swapping cell")
  turtle.dig()
  turtle.dropDown()
  turtle.suckUp()
  turtle.place()
  return true
end

while true do
  --check for cell
  -- if present, check charge level - if full, cycle, if not, wait
  checkCell()
  print("Round complete, sleeping for 30 seconds.")
  sleep(30) -- wait 30 seconds for next check.
end