esp-12 standalone mode

init.lua

print("Setting up WIFI...")
wifi.setmode(wifi.STATION)

--modify according your wireless router settings
wifi.sta.config("SSID","PASS")
wifi.sta.connect()
tmr.alarm(1, 1000, 1, function() 
if wifi.sta.getip()== nil then 
print("IP unavaiable, Waiting...") 
else 
tmr.stop(1)
print("Config done, IP is "..wifi.sta.getip())

tmr.delay(3000)
dofile("webapp.lua")
end 
end)

webapp.lua

id = 0
pin = 7
gpio.mode(7, gpio.OUTPUT)

print("webapp running @ ip")

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> hello akin</h1><form src=\"/\">control outlet 1 <select name=\"pin\" onchange=\"form.submit()\">";
        local _on,_off = "",""
        if(_GET.pin == "ON")then
              _on = " selected=true";
              gpio.write(7, gpio.LOW);
        elseif(_GET.pin == "OFF")then
              _off = " selected=\"true\"";
              gpio.write(7, gpio.HIGH);
        end
          buf = buf.."<option".._on..">ON</option><option".._off..">OFF</option></select></form>";
          lightVal = adc.read(0)          
          buf = buf.."sensor value:"..lightVal;
         
          client:send(buf);
        client:close();
        collectgarbage();
    end)
    end)

    

wiring; http://www.instructables.com/image/FHBYOBHI7RG9PVB
webapp screenshot; http://www.instructables.com/image/FPKIUL3I7RG9PV9
.
make sure that your esp8266 chip has NodeMCU running; http://www.instructables.com/id/Low-cost-WIFI-temperature-data-logger-based-on-ESP/step2
.
and also make sure that you have ESPlorer downloaded to use in programming the esp8266 chip; http://esp8266.ru/esplorer/#download
.
first "save to esp" the webapp.lua and then "save to esp" init.lua using the ESPlorer
remember to change your SSID and PASS inside init.lua
.
you can reach me at; http://www.instructables.com/member/Akin+Yildiz/ for any questions
thank you ;)