NodeMCU and SIM800L

Can someone help me understand how to implement SIM800L on NodeMCU 1.0?!
I connected:

• pin rx from sim800 to tx of NodeMCU,
  
• pin tx from sim800 to rx of NodeMCU,
  
• vcc from sim800 to 3.3v of NodeMCU,
  
• gnd from sim800 to gnd of NodeMCU,
  
• rst from sim800 to D5 of NodeMCU
  
  

Then i got this code:

var wifi = require('Wifi');
var esp = require('ESP8266');
var sim = require('SIM900');

wifi.connect("...........", {password:'...............'}, function(err) {
      if (err) throw err;
      console.log("Connected to wifi");
      console.log(wifi.getIP().ip);
});

var gprs = sim.connect(Serial1, D5, function(err) {
  if (err) throw err;
  gprs.connect('mobile.vodafone.it', '', '', function(err) {
    if (err) throw err;
    gprs.getIP(function(err, ip) {
      if (err) throw err;
      console.log('IP:' + ip);
      require("http").get("http://www.pur3.co.­uk/hello.txt", function(res) {
        console.log("Response: ",res);
        res.on('data', function(d) {
          console.log("--->"+d);
        });
      });
    });
  });
});

I got console stopping to work.
I even thought that as NodeMCU is connected to usb and maybe tx and rx of NodeMCU somehow conflict with usb then i changed on code "serial1" to serial2 or serial3 but nothing.
Then as i thought about the conflict i connected and saved wifi so that i can connect to NodeMCU through wifi for IDE and then send serial connect on next reboot but nothing.
Well ... can someone tell me how it works please?
Thanks