local function is_connected()
  local ipAddr = wifi.sta.getip()
  return ipAddr ~= nil and ipAddr ~= "0.0.0.0"
end

function wlan_init()
  print("WLAN: Configuring")

  wifi.setmode(wifi.STATION)
  wifi.sta.config("", "")

  repeat
    tmr.wdclr()
  until (is_connected())

  local ip = wifi.sta.getip()
  print("WLAN: Configured, ip="..ip)
end