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Ok... i just realized that i can't require on the left side of the espruino IDE... that was the problem...
but i still get an error sometimes and sometimes not on trying to make this rfid work:

ERROR: jshI2CRead:, slave doesn't ACK the transfer.
NFC error undefined

So now i'm using 1mb and formatted it... but what i get now is that doesn't find any library from modules folder in project directory and even other libraries that should be present already in the firmware... the error i get is:

var nfc = require("PN532").connect(I2C1);
WARNING: Module "PN532" not found
Uncaught Error: Unable to mount media : NO_FILESYSTEM
 at line 1 col 26
var nfc = require("PN532").connect(I2C1);

then i format with:

E.flashFatFS({format:true});

and what i get is:

WARNING: Module "PN532" not found
Uncaught Error: Could not open file : NO_PATH
 at line 1 col 30
var mqtt = require("PN532").create(server, {

what is it happening??

Hi,
i got this problem with microsd card reader ... when putting this simple code:

SPI1.setup({mosi:D23, miso:D19, sck:D18});  
E.connectSDCard(SPI1, D5); 
console.log(require("fs").readdirSync());

i get:

Uncaught Error: Unimplemented on Linux
 at line 1 col 25
E.connectSDCard(SPI1, D5);
                        ^
Uncaught Error: Unable to mount media : NO_FILESYSTEM
 at line 1 col 39
console.log(require("fs").readdirSync());
                                      
=undefined

i followed this schema:
https://farm4.staticflickr.com/3954/33675026246_a5bb2ce4c6_o.jpg

then i followed this schema:
http://www.espruino.com/File+IO

i tried with fat32 filesystem, i tried with ext3

i tried changing pins to free pins ... with software spi
nothing... at all
always same error

please someone help me

Has anyone implemented a library for A6 chip?

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