LiquidScan

-- Configuration
local rednetLocation = "top"
local drumLocation   = "back"
local numeric        = 1
local liquid       = {}
-- Configuration End

drum = peripheral.wrap( drumLocation )

rednet.open( rednetLocation )

while true do
    local drumdata     = drum.getTankInfo()[1]

    local maxValue     = drumdata["capacity"]

    if not nil == drumdata["contents"] then
        local id           = drumdata["contents"]["name"]
        local currentValue = drumdata["contents"]["amount"]
        local label        = drumdata["contents"]["rawName"]

        if nil == liquid then
            liquid["id"]    = id
            liquid["label"] = label
        end
    else
        local currentValue = 0
    end

    if not nil == liquid then
        rednet.broadcast( "liquidData " .. numeric .. " " .. liquid["id"] .. " " .. currentValue .. " " .. maxValue .. " " .. liquid["label"] .. "" )
    end

    sleep( 10 )
end

rednet.close( rednetLocation )