Computercraft AE2 Monitoring client

protocol = 'ae2_monitoring'
serverName = 'server.ae2_mon.txl'
routerSide = 'top'
screenSide = 'right'

screen = peripheral.wrap(screenSide)
items = {'minecraft:gold_ingot', 'minecraft:diamond'}

function askStock(item)
    server = rednet.lookup(protocol, serverName)
    rednet.send(server, {request='stock', requestedItem=item}, protocol)
    s, response, p = rednet.receive(protocol)
    return response
end

function update()
    for i = 1, table.getn(items) do
        data = askStock(items[i])
        screen.write(data.name.." : "..data.count)
    end
end

rednet.open(routerSide)

while true do
    update()
    sleep(30)
end