#!/usr/bin/lua

local filesize = require "filesize"
local rxfile = io.open("/sys/class/net/wwan0/statistics/rx_bytes", "r")
local txfile = io.open("/sys/class/net/wwan0/statistics/tx_bytes", "r")

local rx = filesize(tonumber(rxfile:read("*all")))
local tx = filesize(tonumber(txfile:read("*all")))

print("RX:", rx, "TX:",tx)

rxfile:close()
txfile:close()