433MHz RF communication module

To get to the bottom of the issue(s), I 'nlined' the 433 module and began to test with the following - single, generalized code, which behaves according to var xMode: 0= receiver, 1=transmitter```

// x433.js
var xMode = 1; // mode of operation: 0=rx, 1=tx

// ----- get 433 module from 'inlined' source:

var xDev  = (function(){
  var exports = {};

/* Copyright (c) 2015 Gordon Williams, Pur3 Ltd. See the file LICENSE for copying permission. */
/*
// RX
setTimeout(function() {
  require("433").rx(B13, console.log);
}, 100);

// TX
require("433").tx(B13, "Hello", 5, function() {
  console.log("Sent!");
});

*/
/* Sends and receives data over simple 433Mhz AM radio links */


function decode(w) {
  var l = w.data.length;
  var d = new Uint8Array((l+7)>>3);
  for (var i=0;i<l;i+=8)
    d[i>>3] = parseInt(w.data.substr(i,8),2);
  var data = new Uint8Array(d.buffer,0,d.length-1);
  var chksum = data.reduce(function(a,b){return a^b;},0);
  if (chksum == d[d.length-1])
    w.callback(data);
}

// The handler that gets called when the signal changes state. Ideally this would be compiled, but the Web IDE won't do that at the moment.
function sig(w,e) {
 //"compiled";
 var d = 0|10000*(e.time-e.lastTime);
 if (d<1 | d>4) {
  if (w.data.length>20) decode(w);
  w.data="";
 } else if (!e.state) w.data+=0|d>2;
}

/* Set up to receive, and call the callback with a Uint8Array when something
is received. */
exports.rx = function(pin, callback) {
  // rcallback = callback; // aOC *** looks to be not in use?
  var w = {
    data : "",
    callback : callback,
    stop : function() { clearWatch(w.intr); }
  };
  // start listening for a change
  setTimeout(function() {
    // do it after a delay so it doesn't mess up the upload (if there's loads of noise)
    w.intr = setWatch(sig.bind(null,w), pin, {repeat:true, edge:"both"});
  }, 3000);
  return w;
};

// transmit the data using the given pin, repeated the given amount of times (5 seems good)
exports.tx = function(pin, data, repeat, callback, logger) {
  var pulses = [];
  var arr = E.toUint8Array(data);
  // compute checksum
  var chksum = arr.reduce(function(a,b){return a^b;},0);
  data = new Uint8Array(arr.length+1);
  data.set(arr);
  data[data.length-1]=chksum;
  // output data, MSB first
  data.forEach(function(byt) {
    for (var b=7;b>=0;b--) {
      pulses.push((byt&128)?0.3:0.1, 0.42);
      byt<<=1;
    }
  });
  // finish up with a 1ms 'finish' pulse
  pulses.push(1);
  var msecs = E.sum(pulses)+1;  
  if (logger) logger.log({msecs:msecs,pulses:pulses});
  // Transmit
  function send() {
    digitalPulse(pin,1,pulses);
    if (repeat-- > 0) {
      // random time gaps between retransmission
      setTimeout(send, msecs+2+Math.random()*10);
    } else if (callback) {
      setTimeout(callback, msecs + 100);
    }
  }
  // one training pulse at the start
  digitalPulse(pin,1,[1]);
  // now start sending data
  setTimeout(send, 1.5);
};

  return exports;
})();

// var xDev  = require("433");
var xPin  = B3;   // (PICO.4, 1=GND[USB left], 2=VBAT(5V USB), 3=3.3V)


// ----- rx --- xMode=0 -----

function rx() {
  try {
    LED2.set();
    LED1.reset();
    xDev.rx(xPin, function(d){
      console.log(d);
    });
  } catch(x) {
    LED1.set();
    LED2.reset();
    console.log("X2: " + x);
    setTimeout(rx,100);
  }
}

function rxInit() {
  try {
    pinMode(xPin,"input_pulldown");
    rx();
  } catch(x) {
    console.log("X1: " + x);
    setTimeout(rx,100);
  }
}

// ----- tx --- xMode=1 -----

var sigLED = LED1; // red blinks while xmitting
function txStr() { // return string "00" .. "59"
  var s = "0" + Math.floor(getTime()) % 60;
  return s.substr(s.length - 2);
}  
function tx() {
  if (sigLED) sigLED.set();
  s = txStr;
  xDev.tx(xPin,s, 3, function(){
    if (sigLED) sigLED.reset();
  }, console);
}
function txInit() {
  pinMode(xPin,"output");
  xPin.reset();
  setInterval(tx,3000);
}


// ----- onInit() -----

function onInit() {
  if (xMode) {
    txInit();
  } else {
    rxInit();
  }
}

setTimeout(onInit,1000);

The only change so far is in the transmitter: logging what pulses will be 'sent' to the transmit device...

The output (and error) I get in the console is:

 ____                 _
|  __|___ ___ ___ _ _|_|___ ___
|  __|_ -| . |  _| | | |   | . |
|____|___|  _|_| |___|_|_|_|___|
         |_| espruino.com
 1v99 (c) 2018 G.Williams
>
=undefined
{ "msecs": 370.16,
  "pulses": [ 0.1, 0.42, 0.3, 0.42, 0.3, 0.42, 0.3, 0.42, 0.1, 0.42, 0.3, 0.42, 0.3, 0.42, ....
0.42, 1 ]
 }
{ "msecs": 370.16,
  "pulses": [ 0.1, 0.42, 0.3, 0.42, 0.3, 0.42, 0.3, 0.42, 0.1, 0.42, 0.3, 0.42, 0.3, 0.42, ....
0.42, 1 ]
 }
ERROR: Ctrl-C while processing interval - removing it.
Execution Interrupted during event processing.
New interpreter error: CALLBACK,MEMORY
>

Which tells me that just two (2) transmits made it before Espruino crashed?... weird is the Ctrl-C bla bla, though never did a Ctrl-C...

I conclude that There is really something wrong in the State of Espruino.

This is quite possible, since all the fuss about 315/433 communication stuff happened 3+ years ago...