Connecting to one of available WIFI's

Posted on Sun 7th, January 2018

• #1

Hansi

Hello,

Please, could anyone help to solve implementation problem?!
I'm making a thing which I want to take sometimes to another place. As a result, I have two different wifi's(one at home, one at an office), and want to check which is present and connect to one of them. Wifi.scan doesn't work on my ESP8266 (NodeMCU Amica), so I tried 'if' statement. But can't write it correctly.
How is better to solve such task, maybe some of you have faced with it already.
Thanks!!!

var ssid2 = "WIFI2";
var password2 = { password : "PASS2"};
var ssid = "WIFI1";
var password = { password : "PASS1"};

var wifi;

wifi = require("Wifi");
wifi.connect(ssid, password, function(err) {
  if (err){
    console.log("Connection error: " + err);
    wifi.connect(ssid2, password2, function(err)){
      if (err){
        console.log("Connection error: " + err);
        return;
      }
      console.log("Connected! WIFI2");
  }
  console.log("Connected! WIFI1");
});

• #2

MaBe

Hi @Hansi,

I tried a simple snippet and found that callback is not processed if SSID is not available.

Created issue #1297

• #3

MaBe

Does this Wifi scan snippet work for you?

require('Wifi').scan(function(e) {
  console.log(e);
});

/*
output:
[
  { "rssi": -78, "channel": 1, "authMode": 4, "isHidden": false,
    "ssid": "SSID1",
    "mac": "b8:8d:12:68:24:3f"
   },
  { "rssi": -52, "channel": 1, "authMode": 4, "isHidden": false,
    "ssid": "SSID2",
    "mac": "a2:a0:bb:f2:04:59"
   }
 ]

*/

• #4

Hansi in reply to @MaBe

Hello @MaBe,
Yes, this one has returned me local wifi ap (just for info I have 1.93v).
Now I can write a workaround just parsing it passing the correct value in ssid and password. Will try it today.

Thanks!

• #5

ClearMemory041063

See attached file ServeHello3.post.js

The first case

var SSID1="faux";
var key1= "a6a69";
var SSID2="faux2";
var key2= "a6a70";
var SSID=SSID1;
var key=key1;

 1v94 Copyright 2016 G.Williams
>Start
Start connection process
end require
end test 0
=undefined
Reset the ESP8266
end reset
Hello World
Connecting to WiFi  faux
end connect
Hello World
Hello World
Hello World
null
IP=  192.168.1.9
null
Wi-Fi Connected

And the other case

var SSID1="faux";
var key1= "a6a69";
var SSID2="faux2";
var key2= "a6a70";
var SSID=SSID2;
var key=key2;

 1v94 Copyright 2016 G.Williams
>Start
Start connection process
end require
end test 0
=undefined
Reset the ESP8266
end reset
Hello World
Connecting to WiFi  faux2
end connect
Hello World
Hello World
Hello World
Hello World
Hello World
Hello World
Hello World
Hello World
Hello World
WiFi connect failed: FAIL
errr 1
Hello World
faux
Start
Start connection process
end require
end test 0
Reset the ESP8266
end reset
Hello World
Connecting to WiFi  faux
end connect
Hello World
Hello World
Hello World
null
IP=  192.168.1.9
null
Wi-Fi Connected
>

1 Attachment

ServeHello3post.js

• #6

ClearMemory041063

Cleaning it up a bit:

The code

//ServeHello4.js  7Jan2018
//http//192.168.1.6:8080
//espruino board with ESP8266
//PICO  with ESP8266
//var Hardware=0; //Espruino board
var Hardware =1; //PICO
// list of Wifi and passwords
var hotspots=[
  {SSID:"faux",key:"a6a69"},
  {SSID:"faux2",key:"a6a70"}
];
var hotspot=1;
console.log(hotspots.length);
var Serial;
var Startagain=0;
var myinterval;
function test(){
if(Hardware===1)Serial=Serial2;
if(Hardware===0)Serial=Serial4;
if(Hardware===1){
 digitalWrite(B9,1); // enable on Pico Shim V2
 Serial.setup(115200, { rx: A3, tx : A2 }); //Pico
}
if(Hardware===0)Serial.setup(115200, { rx: C11, tx : C10 }); 
//espruino board
console.log("Start connection process");
var wifi = require("ESP8266WiFi_0v25").connect(Serial, function(err) {
 if (err){Startagain=1;return 1;}
 console.log("Reset the ESP8266");
 wifi.reset(function(err) {
  if (err){Startagain=1;return 1;}
  console.log("Try Connecting to WiFi ",hotspots[hotspot].SSID);
  wifi.connect(hotspots[hotspot].SSID,hotspots[hotspot].key, function(err) {console.log(err);
   if (err){Startagain=1;return 1;
}
    wifi.getIP(function(l,ip){
     if (err){Startagain=1;return;}
     console.log("IP= ",ip,"\n\r"+l);
     console.log("Wi-Fi Connected");
     clearInterval( myinterval);
     var http = require("http");
     //do a server
     http.createServer(function (req, res) {
      res.writeHead(200);
      res.end("Hello World");
     }).listen(8080); //end server
  });//end getIP
  console.log("end getIP");
 });//end connect
 console.log("end connect");
});//end reset
 console.log("end reset");
});//end require
  console.log("end require");
  return 0;
}//end test
function ccc(){
  var x=0;
console.log("Start");
x=test();
console.log("end test",x);
if(x!==0){
  console.log("Try again");//error seen
}
}//end cccc
myinterval=setInterval(function () {
  console.log("Test for error");
  if(Startagain){
   Startagain=0;
   hotspot++;
   if(hotspot>=hotspots.length)hotspot=0;
   console.log(hotspots[hotspot].SSID);
   ccc();
  }//end of errr
}, 2000);
ccc();

The left pane output, note faux2 is not in range, but faux is

>2
Start
Start connection process
end require
end test 0
=undefined
Reset the ESP8266
end reset
Test for error
Try Connecting to WiFi  faux2
end connect
Test for error
Test for error
Test for error
Test for error
Test for error
Test for error
Test for error
Test for error
WiFi connect failed: FAIL
Test for error
faux
Start
Start connection process
end require
end test 0
Reset the ESP8266
end reset
Test for error
Try Connecting to WiFi  faux
end connect
Test for error
Test for error
Test for error
null
end getIP
IP=  192.168.1.9
null
Wi-Fi Connected

1 Attachment

ServeHello4post.js

• #7

ClearMemory041063

Listing the WiFI APs

Using either a PICO or an Espruino Original Board connected via the serial port to and ESP8266.

The code:

//GetAPs.js  11Jan2018
// ESP8266 connected via serial port to PICO or Espruino Board

//espruino board with ESP8266
//PICO  with ESP8266

//var Hardware=0; //Espruino board
var Hardware =1; //PICO

var Serial;

//setup serial port
if(Hardware===1)Serial=Serial2;
if(Hardware===0)Serial=Serial4;

if(Hardware===1){
 digitalWrite(B9,1); // enable on Pico Shim V2
 Serial.setup(115200, { rx: A3, tx : A2 }); //Pico
}
if(Hardware===0)Serial.setup(115200, { rx: C11, tx : C10 }); 
//espruino board

var cmd="";
Serial.on('data', function (data) { 
//  console.log(data);
  cmd+=data;
  var idx = cmd.indexOf("\r");
  while (idx>=0) { 
    var line = cmd.substr(0,idx);
    cmd = cmd.substr(idx+1);
    print(line);
    idx = cmd.indexOf("\r");
  }
});

function sendAT(){
  Serial.print("AT");
}//end sendAT


sendAT();
setTimeout(function () {
  console.log("Hello World1");
  Serial.write("+++");
setTimeout(function () {
  console.log("Hello World2");
  Serial.write("AT+CWLAP\r\n");
}, 5000);
}, 5000);

Sample Output

 1v94 Copyright 2016 G.Williams
>
=undefined
Garbage Characters
>
Ai-Thinker Technology Co. Ltd.
ready
>
WIFI CONNECTED
>
WIFI GOT IP
Hello World1
Hello World2
>
+++AT+CWLAP
>
>
+CWLAP:(4,"faux2",-51,"04:4e:5a:94:24:e4",1,-36,0)
>
+CWLAP:(0,"xfinitywifi",-87,"c6:27:95:38:8b:48",1,-19,0)
>
+CWLAP:(3,"ATT3x349v4",-91,"cc:65:ad:7e:e2:20",1,-22,0)
>
+CWLAP:(0,"xfinitywifi",-48,"16:4e:5a:94:24:e4",1,32767,0)
>
+CWLAP:(4,"HOME220-2.4",-83,"70:54:d2:07:7c:c0",6,-17,0)
>
+CWLAP:(1,"faux",-50,"20:4e:7f:03:87:cd",6,-24,0)
>
+CWLAP:(0,"xfinitywifi",-82,"70:54:d2:07:7c:c2",6,-17,0)
>
+CWLAP:(3,"AMKUS146",-93,"9e:d3:6d:bb:a8:5c",7,-17,0)
>
+CWLAP:(3,"Gearfam",-93,"78:f2:9e:0e:74:c8",6,-26,0)
>
+CWLAP:(4,"ATT6UuI5FT",-88,"f8:18:97:b6:71:32",9,50,0)
>
+CWLAP:(0,"xfinitywifi",-79,"0c:54:a5:64:cf:c2",11,-36,0)
>
+CWLAP:(4,"HOME-24D1-2.4",-79,"0c:54:a5:64:cf:c0",11,-34,0)
>
+CWLAP:(4,"ATT5wAn8b9",-80,"f8:18:97:d5:63:06",11,51,0)
>
+CWLAP:(0,"xfinitywifi",-92,"0c:54:a5:6b:f8:aa",11,-21,0)
OK
>

1 Attachment

GetAPs.js

• #8

ClearMemory041063

GetAps1 Using the functions in the WiFi module

The Code

//getAps1.js  11Jan2018
//espruino board with ESP8266
//PICO  with ESP8266

//var Hardware=0; //Espruino board
var Hardware =1; //PICO
var Serial;
var Startagain=0;
var myinterval;

function test(){
if(Hardware===1)Serial=Serial2;
if(Hardware===0)Serial=Serial4;

if(Hardware===1){
 digitalWrite(B9,1); // enable on Pico Shim V2
 Serial.setup(115200, { rx: A3, tx : A2 }); //Pico
}
if(Hardware===0)Serial.setup(115200, { rx: C11, tx : C10 }); 
//espruino board

console.log("Start connection process");
var wifi = require("ESP8266WiFi_0v25").connect(Serial, function(err) {
 if (err){Startagain=1;return;}
 console.log("Reset the ESP8266");
 wifi.reset(function(err) {
  if (err){Startagain=1;return;}
  wifi.getAPs(function(err,reply){console.log(err,reply);
  wifi.getVersion(function(err,reply){console.log(err,reply);});
  });
});//end reset
 console.log("end reset");
});//end require
  console.log("end require");
}//end test

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

test();

Sample Output

 1v94 Copyright 2016 G.Williams
>Start connection process
end require
=undefined
Reset the ESP8266
end reset
Test for error
Test for error
null [
  {
    "ssid": "ATT5wAn8b9",
    "enc": "wpa_wpa2_psk",
    "signal": -79,
    "mac": "f8:18:97:d5:63:06"
   },
  {
    "ssid": "ATT3x349v4",
    "enc": "wpa2_psk",
    "signal": -84,
    "mac": "cc:65:ad:7e:e2:20"
   },
  {
    "ssid": "xfinitywifi",
    "enc": "open",
    "signal": -81,
    "mac": "c6:27:95:38:8b:48"
   },
  {
    "ssid": "xfinitywifi",
    "enc": "open",
    "signal": -48,
    "mac": "16:4e:5a:94:24:e4"
   },
  {
    "ssid": "xfinitywifi",
    "enc": "open",
    "signal": -90,
    "mac": "c6:27:95:38:c5:20"
   },
  {
    "ssid": "BLACKHAWKS19",
    "enc": "wpa_wpa2_psk",
    "signal": -81,
    "mac": "c4:27:95:38:8b:46"
   },
  {
    "ssid": "NETGEAR60",
    "enc": "wpa2_psk",
    "signal": -85,
    "mac": "e4:f4:c6:17:27:50"
   },
  {
    "ssid": "NETGEAR-Guest",
    "enc": "wpa2_psk",
    "signal": -84,
    "mac": "e6:f4:c6:17:27:51"
   },
  {
    "ssid": "faux",
    "enc": "wep",
    "signal": -49,
    "mac": "20:4e:7f:03:87:cd"
   },
  {
    "ssid": "HOME220-2.4",
    "enc": "wpa_wpa2_psk",
    "signal": -82,
    "mac": "70:54:d2:07:7c:c0"
   },
  {
    "ssid": "xfinitywifi",
    "enc": "open",
    "signal": -84,
    "mac": "70:54:d2:07:7c:c2"
   },
  {
    "ssid": "AMKUS146",
    "enc": "wpa2_psk",
    "signal": -90,
    "mac": "9e:d3:6d:bb:a8:5c"
   },
  {
    "ssid": "ATT6UuI5FT",
    "enc": "wpa_wpa2_psk",
    "signal": -88,
    "mac": "f8:18:97:b6:71:32"
   },
  {
    "ssid": "HP-Print-1E-Officejet Pro 8610",
    "enc": "wpa2_psk",
    "signal": -88,
    "mac": "fc:15:b4:aa:a9:1e"
   },
  {
    "ssid": "HOME-24D1-2.4",
    "enc": "wpa_wpa2_psk",
    "signal": -83,
    "mac": "0c:54:a5:64:cf:c0"
   },
  {
    "ssid": "xfinitywifi",
    "enc": "open",
    "signal": -83,
    "mac": "0c:54:a5:64:cf:c2"
   }
 ]
null AT version:0.60.0.0(Jan 29 2016 15:10:17)
Test for error
Test for error
Test for error
>reset();
=undefined

1 Attachment

GetAPs1.js

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Connecting to one of available WIFI's

See attached file ServeHello3.post.js

The first case

And the other case

The code

The left pane output, note faux2 is not in range, but faux is

Listing the WiFI APs

The code:

Sample Output

GetAps1 Using the functions in the WiFi module

The Code

Sample Output

About