item = "gravel"
maxAmount = 64
maxStack = 64
sendSide = 4
parent = 1930
counter = 1963

itemID = 0
sorter = peripheral.wrap("front")

rednet.open("right")

getID = function()
	rednet.send(parent, textutils.serialize({[1]=0, [2]=item}))
	ID, message = rednet.receive()
	if ID == parent then
		itemID = message + 0
	end
end

count = function()
	cnt = sorter.list(0)[itemID]

	if cnt == nil then
		return 0
	else
		return cnt
	end
end

start = function()
	getID()

	sorter.sort(sendSide)

	while true do
		event, ID, message = os.pullEvent()

		if event == "isort_item" then
			if ID + 0 == itemID then
				sorter.sort(0)
			else
				sorter.sort(sendSide)
			end
		end
	end
end

start()