• Good For MAC
• Manual Install and Flash : https://nodemcu.readthedocs.io/en/dev/en/flash/
• Install Python
• Full DOC : https://github.com/themadinventor/esptool#flash-modes
• E.g. 

  esptool.py --port /dev/cu.SLAB_USBtoUART write_flash -fm qio -fs 32m 0x00000 nodemcuflash.bin

• 
  
  
• --------------------------------------------------------------------------------

1. wifi.setmode(wifi.STATION)
   wifi.sta.config("SweetHome","parc362a")
   print(wifi.sta.getip())
   led1 = 3
   led2 = 4
   gpio.mode(led1, gpio.OUTPUT)
   gpio.mode(led2, gpio.OUTPUT)
   srv=net.createServer(net.TCP)
   srv:listen(80,function(conn)
       conn:on("receive", function(client,request)
           local buf = "";
           local _, _, method, path, vars = string.find(request, "([A-Z]+) (.+)?(.+) HTTP");
           if(method == nil)then
               _, _, method, path = string.find(request, "([A-Z]+) (.+) HTTP");
           end
           local _GET = {}
           if (vars ~= nil)then
               for k, v in string.gmatch(vars, "(%w+)=(%w+)&*") do
                   _GET[k] = v
               end
           end
           buf = buf.."<h1> ESP8266 Web Server</h1>";
           buf = buf.."<p>GPIO0 <a href=\"?pin=ON1\"><button>ON</button></a>&nbsp;<a href=\"?pin=OFF1\"><button>OFF</button></a></p>";
           buf = buf.."<p>GPIO2 <a href=\"?pin=ON2\"><button>ON</button></a>&nbsp;<a href=\"?pin=OFF2\"><button>OFF</button></a></p>";
           local _on,_off = "",""
           if(_GET.pin == "ON1")then
                 gpio.write(led1, gpio.HIGH);
           elseif(_GET.pin == "OFF1")then
                 gpio.write(led1, gpio.LOW);
           elseif(_GET.pin == "ON2")then
                 gpio.write(led2, gpio.HIGH);
           elseif(_GET.pin == "OFF2")then
                 gpio.write(led2, gpio.LOW);
           end
           client:send(buf);
           client:close();
           collectgarbage();
       end)
   end)

Module - Description