dropCoalv2 - ComputerCraft Turtle Program

--[[
Coal dropper for Botania mana generation.  version 2.0 by ThaWade.
Use with checkMana program found > http://pastebin.com/Jgyf9zYE

Default setup is: Redstone Input:Back, Item Container:Front
]]

local dropCount = 49--change this to the number of Endoflames you're using.
local sleepTime = 44-- sleep time between each coal drop.
local inputSignal = "back"--The redstone input side.
local grabCount = 0

function clearTerm()
    term.clear()
    term.setCursorPos(1,1)
end

function grabItems()
local dropSlotCount = turtle.getItemCount(1)
local maxCount = 64
    print("Grabbing Items from external inventory")
    turtle.select(1)
    local grabCount = maxCount - dropSlotCount
    if turtle.suck(grabCount) == true then
        print("Done grabbing items")
    elseif turtle.suck(grabCount) == false then
        print("Nothing to grab items from")
    end
end

function dropCoal()
    turtle.select(1)
    print("Dropping coal...")
    if dropCount > 32 then
        turtle.dropDown(dropCount)
        grabItems()
        turtle.dropDown(dropCount)
    elseif dropCount <= 32 then
        turtle.dropDown(dropCount)
    end
    print("Done dropping coal...")
    print("Sleeping " ..sleepTime.. " seconds.")
    sleep(sleepTime)
end

clearTerm()

while true do
clearTerm()
    if turtle.getItemCount(1) >= dropCount then
        if redstone.getInput(inputSignal) == true then
            print("Redstone signal present...")
            dropCoal()
        elseif redstone.getInput(inputSignal) == false then
            print("Redstone signal NOT present...")
            print("Sleeping 60 seconds")
            sleep(60)
        end
    elseif turtle.getItemCount(1) < dropCount then
            z = turtle.getItemCount(2)
        if z > 0 then
            turtle.select(2)
            turtle.transferTo(1)
        end
            if z == 0 then
                grabItems()
            end
    end
end