gistfile1.lua

wirelessimagewidget = widget({ type = 'imagebox', align='right' })
wirelessimagewidget.image = image(beautiful.widget_wifi)
wirelesswidget = widget({ name = 'wireless', type = 'textbox', align = 'right' })
function wireless_status(format)
    local sysfile = io.open("/sys/class/net/wlan0/operstate")
    if sysfile == nil then
        return { '' }
    end

    local operstate = sysfile:read()
    sysfile:close()
    if operstate == 'down' then
        return { " <span color='red'>down</span>" }
    end

    local sysfile = io.open("/sys/class/net/wlan0/wireless/link")
    local link = sysfile:read()
    sysfile:close()
    return { " " .. string.format("%.3d", link) .. "%% " }
end
wicked.register(wirelesswidget, wireless_status, "$1", 5, nul, nul)