dest = 16
me = 15
sleep = 1

modem = peripheral.find("modem")
inv = peripheral.wrap("left")
items = {}

if not modem.isOpen(me) then
    modem.open(me)
else
    print("ERROR >> Port " .. me .. " is already opened!")
end

function check_inv()
    items = {}
    for i = 1, inv.size() do
        data = inv.getItemMeta(i)
        if data then
            items[i] = { count = data.count, name = data.displayName }
        end
    end

    modem.transmit(dest, me, items)
end

while true do
    check_inv()
    os.sleep(sleep)
end