nodemcu_sample.lua

wifi.setmode(wifi.STATION)
wifi.sta.config('YOUR_SSID','YOUR_SSID_PWD')
wifi.sta.connect()
tmr.alarm(1, 5000, 1, function() 
    if wifi.sta.getip()== nil then
        print('IP unavaiable, waiting...') 
    else
        tmr.stop(1)
        print('IP is '..wifi.sta.getip())

        conn=net.createConnection(net.TCP, false) 
        conn:on("receive", function(conn, pl) print(pl) end)
        conn:connect(80,"121.41.33.127")
        conn:send("GET / HTTP/1.1\r\nHost: www.nodemcu.com\r\n" .."Connection: keep-alive\r\nAccept: */*\r\n\r\n")


        srv=net.createServer(net.TCP) 
        srv:listen(80,function(conn) 
            conn:on("receive",function(conn,payload) 
                print(payload) 
                conn:send("<h1>Hello, this is a simple http response from a NodeMCU module  .</h1>")
            end) 
        end)
    end
 end)