turtlefarm(no fuel required)

        --[[
        TreeFarmerSingle

        by Severino

        Version 1.5

        Harvests a single tree and transfers wood to a chest, getting saplings and fuel from other chests.

        Create a square of fences with 10 on each side.  Leave the center fence out on one side.  Put a source water block in each corner.

        + - - - - - - - - - +
        | W               W |
        |                   |
        |                   |
        |                   |
        |         S         |
        |                   |
        |                   |
        |                   |
        | W               W |
        + - - - -   - - - - +
               HH T BB
                C P

        S  = Sapling.  Plant the first sapling.
        W  = Source Water Block
        HH = Stack of double chests for harvested wood starting at ground level.
        BB = Double chest for bone meal at ground level.
        P  = Single chest to store planks used for fuel at ground level
        T  = Single chest below ground level to store saplings.  Felling or Mining turtle is placed above this chest.
        C  = Crafting turtle at ground level

        Load Crafting turtle with PlankCrafter program and setup "startup" program to run this program. Leave turtle slots empty.  Run the startup program.

        Load Felling Turtle with TreeFarmerSingle program and setup "startup" program to run this program.
        Prepare the Felling Turtle by placing the following items in it's slots.
        Slot 1 - Stack of planks to use for fuel
        Slot 2 - 2 Saplings
        Slot 3 = Stack of Bone meal for fertilizer
        Slot 4 = 1 Fence
        Slot 5 = 1 Chest
        Slot 6 = 1 wood block
        The saplings, wood block and planks for fuel must all be the same type of tree.
        Run the startup program.  The first time the program runs it will ask for the computer ID of the computer that the MinerMonitor program is running on.  Enter 0 if you don't have one.
        Use the MinerMonitor computer to monitor the status of the turtles running the TreeFarmerSingle, TreeFarmer and Miner8 programs.
        If you later want to start using a MinerMonitor program, delete the file ConsoleID from the turtle and restart the program.  It will ask for the computer ID again.


        ]]--
            version = "1.5 - NO FUEL"
            slotFuel = 1
            slotSapling = 2
            slotFertilizer = 3
            slotFence = 4
            slotChest = 5
            slotWood = 6
            minerID = os.getComputerID()
            consoleID = 0
            harvestWide = false
            turtleName = nil

            function updateStatus(msg, silent)
              if not rednet.isOpen("right") then rednet.open("right") end
              if rednet.isOpen("right") then
                if turtleName == nil then return end
                networkmsg = "MM:"..turtleName..": "..msg
                if consoleID == 0 then
                  rednet.broadcast(networkmsg)
                else
                  rednet.send(consoleID,networkmsg)
                end
              end
              if not silent then print(msg) end
            end
            function getTurtleName()
              local fname = "TurtleName"
              if fs.exists(fname) then
                file = fs.open(fname, "r")
                turtleName = file.readAll()
                file.close()
              else
                term.write("Turtle Name: ")
                turtleName = io.read()
                file = fs.open(fname, "w")
                file.write(turtleName)
                file.close()
              end
            end
            function loadFuel()
              turtle.turnRight()
              turtle.turnRight()
              turtle.select(slotFuel)
              if turtle.suck() then
                for d=1,16 do
                  if d ~= slotFuel then
                    turtle.select(d)
                    if turtle.compareTo(slotFuel) then turtle.drop() end
                  end
                end
              else
                updateStatus("No Fuel Required.")
              end
              turtle.turnRight()
              turtle.turnRight()
            end
            function loadSaplings()
              if turtle.getItemCount(slotSapling) < 2 then
                turtle.select(slotSapling)
                if turtle.suckDown(2) then
                  for d=1,16 do
                    if d ~= slotSapling then
                      turtle.select(d)
                      if turtle.compareTo(slotSapling) then turtle.dropDown() end
                    end
                  end
                  return true
                else
                  updateStatus("Sapling chest is empty.")
                  return false
                end
              end
            end
            function loadFertilizer()
              turtle.turnRight()
              turtle.select(slotFertilizer)
              if turtle.suck() then
                for d=1,16 do
                  if d ~= slotFertilizer then
                    turtle.select(d)
                    if turtle.compareTo(slotFertilizer) then turtle.drop() end
                  end
                end
              else
                updateStatus("Fertilizer chest is empty.")
              end
              turtle.turnLeft()
            end
            function unloadWood()
              turtle.turnLeft()
              for d = 1,16 do
                turtle.select(d)
                if d ~= slotFuel and d ~= slotSapling and d ~= slotFertilizer and d ~= slotFence and d ~= slotChest and d ~= slotWood then
                  if turtle.getItemCount(d) > 0 then
                    if not turtle.drop() then
                      updateStatus("Wood chest is full.")
                      break
                    end
                  end
                end
              end
              if turtle.getItemCount(slotWood) > 1 then
                turtle.select(slotWood)
                turtle.drop(turtle.getItemCount(slotWood)-1)
              end
              --
              turtle.turnRight()
            end
            function unloadSaplings()
              for d=1,16 do
                if d ~= slotSapling then
                  turtle.select(d)
                  if turtle.compareTo(slotSapling) then turtle.dropDown() end
                end
              end
              if turtle.getItemCount(slotSapling)>2 then
                turtle.select(slotSapling)
                turtle.dropDown(turtle.getItemCount(slotSapling)-2)
              end
            end
            function getConsoleID()
              local fname = "ConsoleID"
              if fs.exists(fname) then
                file = fs.open(fname, "r")
                consoleID = tonumber(file.readAll())
                file.close()
                print("Monitor Console ID: "..consoleID)
              else
                updateStatus("Waiting for Console ID...",true)
                term.write("Monitor Console ID: ")
                consoleID = io.read()
                file = fs.open(fname, "w")
                file.write(consoleID)
                file.close()
                consoleID = tonumber(consoleID)
              end
            end
            function locateStartingPosition()
              turtle.select(slotChest)
              if not turtle.compareDown() then
                -- Not above a chest.
                while turtle.back() do
                  if turtle.compareDown() then break end
                end
                if not turtle.compareDown() then
                  while true do
                    updateStatus("Can't find starting position. Need help.")
                    sleep(60)
                  end
                end
              end
              for d=1,4 do
                if not turtle.detect() then break end
                turtle.turnLeft()
              end
              if turtle.detect() then
                while true do
                  updateStatus("Can't find starting position. Need help.")
                  sleep(60)
                end
              end
            end
            function checkSetup()
              while turtle.getItemCount(slotFuel) < 2 do
                updateStatus("Fuel needed in slot "..slotFuel)
                sleep(20)
              end
              while turtle.getItemCount(slotSapling) < 2 do
                if not loadSaplings() then
                  updateStatus("Saplings needed in slot "..slotSapling)
                  sleep(20)
                end
              end
              if turtle.getItemCount(slotFertilizer) < 1 then
                updateStatus("Fertilizer needed in slot "..slotFertilizer)
              end
              while turtle.getItemCount(slotFence) < 1 do
                updateStatus("Fence needed in slot "..slotFence)
                sleep(20)
              end
              while turtle.getItemCount(slotChest) < 1 do
                updateStatus("Chest needed in slot "..slotChest)
                sleep(20)
              end
              while turtle.getItemCount(slotWood) < 1 do
                updateStatus("Wood needed in slot "..slotWood)
                sleep(20)
              end
            end
            function harvestTrunk()
              -- Go up the trunk and clear each level spreading out up to half the distance between the trees.
              turtle.select(slotWood)
              if turtle.detect() then
                turtle.dig()
                turtle.forward()
                local h = 0
                if harvestWide then
                  while harvestLevel() or isWoodUp() do
                    turtle.digUp()
                    if turtle.up() then h = h + 1 end
                  end
                else
                  while isWoodUp() do
                    turtle.digUp()
                    updateStatus("Chopping Tree Down")
                    if turtle.up() then h = h + 1 else break end
                  end
                end
                local d  = 1
                while d <= h do
                  if turtle.detectDown() then
                    turtle.digDown()
                  end
                  if turtle.down() then
                    d = d + 1
                  end
                end
                turtle.back()
              end
            end
            function selectSapling()
              -- Look at all of the slots and if a slot other than the default sapling slot contains saplings, then return this slot.
              local slot = 0
              for slot=1,16 do
                if slot ~= slotSapling then
                  if turtle.getItemCount(slot) > 1 then
                    turtle.select(slot)
                    if turtle.compareTo(slotSapling) then return true end
                  end
                end
              end
              if turtle.getItemCount(slotSapling) > 1 then
                turtle.select(slotSapling)
                return true
              end
              return false
            end
            function selectFertilizer()
              -- Look at all of the slots and if a slot other than the default bone meal slot contains bone meal, then move them into the default bone meal slot.
              local slot = 0
              for slot=1,16 do
                if slot ~= slotFertilizer then
                  if turtle.getItemCount(slot) > 1 then
                    turtle.select(slot)
                    if turtle.compareTo(slotFertilizer) then return true end
                  end
                end
              end
              if turtle.getItemCount(slotFertilizer) > 1 then
                turtle.select(slotFertilizer)
                return true
              end
              return false
            end
            function isWood()
              turtle.select(slotWood)
              local woodFound = turtle.compare()
              return woodFound
            end
            function isWoodUp()
              turtle.select(slotWood)
              local woodFound = turtle.compareUp()
              return woodFound
            end
            function isSapling()
              local saplingFound = false
              turtle.select(slotSapling)
              saplingFound = turtle.compare()
              if not saplingFound then print("Not a sapling.") end
              return saplingFound
            end
            function applyFertilizer()
            updateStatus("Applying Fertilizer.")
              -- Apply fertilizer and report if there is a problem.
              if turtle.detect() then
                if selectFertilizer() then
                  local cnt = 0
                  local applied = false
                  while not isWood() and cnt < 10 do
                    if selectFertilizer() then
                      if turtle.place() then applied = true end
                      cnt = cnt + 1
                    end
                  end
                  if applied then
                    return true
                  else
                    updateStatus("Unable to fertilize.")
                    return false
                  end
                else
                  updateStatus("Out of fertilizer.")
                  return false
                end
              else
                updateStatus("Nothing to fertilizer.")
                return false
              end
            end
            -- Main program
            updateStatus("Starting")
            term.clear()
            term.setCursorPos(1,1)
            print("Sev's Tree Farmer Single "..version)
            print("Turtle ID: "..minerID)
            getTurtleName()
            getConsoleID()
            checkSetup()
            locateStartingPosition()
            -- Now start planting and harvensting trees.
            while true do
              -- Check for enouhg fuel.
              if turtle.getItemCount(slotFuel) < 64 then loadFuel() end
              if turtle.getItemCount(slotSapling) < 2 then loadSaplings() end
              if turtle.getItemCount(slotFertilizer) < 30 then loadFertilizer() end
              for l=1,5 do
                while not turtle.forward() do
                  updateStatus("Blocked.")
                  sleep(20)
                end
              end
              turtle.select(slotSapling)
              turtle.suck()
              turtle.select(slotWood)
              if not turtle.compare() then applyFertilizer() end
              turtle.select(slotWood)
              if turtle.compare() then harvestTrunk() end
              if not turtle.detect() then
                if selectSapling() then
                  turtle.suck()
                  turtle.place()
                end
              end
              for l=1,5 do
                while not turtle.back() do
                  updateStatus("Blocked.")
                  sleep(20)
                end
              end
              unloadWood()
              unloadSaplings()
              updateStatus("Waiting for Sapling to Grow.")
              sleep(140)
            end