How to send a large amount of data faster ?

You are reading a single comment by @ClearMemory041063 and its replies. Click here to read the full conversation.

•

Running on Sparkfun Thing -dev ESP8266 board

The HTML code splits data into lines in this one.

//WSDesp8266 24Jan2018

//http//192.168.1.6:8080
//ESP8266 with Espruino flashed


// list of Wifi and passwords
var SSID="xxxxxx";
var key="keykeykey";
var Startagain=0;
var myinterval;

var n =4, chk=2*1024;
var tdata=new Uint8Array(chk);
var i;
for(i=0;i<1024;i++){
  tdata[i]=0x30;
  tdata[i+1024]=0x31;
}//next i

var page = 
"<html>\r\n<body>\r\n<textarea id=\"demo\" rows=\"32\" cols=\"64\"></textarea>\r\n<script>\r\nvar ws;\r\nvar data=\"\";\r\n//setTimeout(function(){\r\nws = new WebSocket(\"ws://\" + location.host + \"/my_websocket\", \"protocolOne\");\r\nws.onmessage = function (event) { \r\ndata+=event.data;\r\ndocument.getElementById(\"demo\").innerHTML = data;\r\nws.send(\"Hello to Espruino!\"); \r\n };\r\n//setTimeout(function() { ws.send(\"Hello to Espruino!\"); }, //1000);}\r\n//,1000);\r\n\r\n</script></body>\r\n</html>\r\n"
;
function onPageRequest(req, res) {
  res.writeHead(200, {'Content-Type': 'text/html'});
  res.end(page);
}

function test(){

console.log("Start connection process");
var wifi = require("Wifi");
 console.log("Try Connecting to WiFi ",SSID);
 wifi.connect(SSID,{password:key}, function(err) {
  console.log(err);
   if (err){Startagain=1;return;
}
 console.log("connected? err=", err, "info=", wifi.getIP());
     console.log("Wi-Fi Connected");
     clearInterval( myinterval);
     var t=getTime();
var server = require('ws').createServer(onPageRequest);
server.listen(8080);
server.on("websocket", function(ws) {
    ws.on('message',function(msg) {
    n--;
  print("n=",n,"t:",(getTime()-t).toFixed(3),"sec");
      print("[WS] "+JSON.stringify(msg));
      if(n) ws.send(E.toString(tdata));
    });
  t=getTime();
  ws.send(E.toString(tdata));
  print("n=",n,"t:",(getTime()-t).toFixed(3),"sec");
});
 });//end connect
}//end test

myinterval=setInterval(function () {
  console.log("Test for error");
  if(Startagain){
   Startagain=0;
   test();
  }//end of Startagain
}, 2000);

test();

Sending 2 kbytes of data 4 times

 1v95 Copyright 2017 G.Williams
Espruino is Open Source. Our work is supported
only by sales of official boards and donations:
http://espruino.com/Donate
Flash map 512KB:256/256, manuf 0x1f chip 0x8401
>Start connection process
Try Connecting to WiFi  faux
=undefined
null
connected? err= null info= {
  "ip": "192.168.1.12",
  "netmask": "255.255.255.0",
  "gw": "192.168.1.1",
  "mac": "5c:cf:7f:8b:1b:99"
 }
Wi-Fi Connected
n= 4 t: 0.015 sec
n= 3 t: 0.118 sec
[WS] "Hello to Espruino!"
n= 2 t: 0.209 sec
[WS] "Hello to Espruino!"
n= 1 t: 0.327 sec
[WS] "Hello to Espruino!"
n= 0 t: 0.426 sec
[WS] "Hello to Espruino!"
>

8192 bytes sent
0.426 - 0.015 = 0.411 seconds
8192 / 0.411 = 19,931.9 bytes per second
19931.9 * 8 = 159,454.9 bits per second

How to send a large amount of data faster ?

Running on Sparkfun Thing -dev ESP8266 board

Sending 2 kbytes of data 4 times

About

Espruino