NodeMCU init_draft.lua

init_draft.lua

-- require "tmr"
rr_tmr = tmr.create() -- round-robin timer for wifi connect

stations = {
  current = 0,
  {
    ssid="AP1",
    pwd="123456",
    save=false
  },
  {
    ssid="AP2",
    pwd="123456",
    save=false
  },
  {
    ssid="AP3",
    pwd="123456",
    save=false
  }
}

function rr_wifi(timer)
  local ip = wifi.sta.getip()
  if ip then --connected
    rr_tmr:unregister() ; rr_tmr = nil
    print("Connected to ".. stations[stations.current].ssid .."with IP ".. ip)
  else
    stations.current = stations.current + 1
    if type(stations[stations.current]) ~= "table" then
      stations.current = 1
    end
    print("Trying station " .. stations[stations.current].ssid)
    wifi.sta.config(stations[stations.current])
  end
end

wifi.setmode(wifi.STATION)
rr_tmr:alarm(5000, tmr.ALARM_AUTO, rr_wifi)