EspruinoWifi - Ping function / Default gateway

[espruino-discuss]

Posted at 2017-10-18 by Sacha

Dear Gordon

Besides the udp send/receive functions i have another wish for 1.95 ;-).
Could you please implement the ping function in the wifi library as well.

Is there a way to get the default gateway address received by the dhcp protocoll ?

Thanks

Sacha

[espruino-discuss]

Posted at 2017-10-18 by @gfwilliams

Hi,

It looks like something like this will work to add Ping if you need it:

wifi.ping = function(addr, callback) {
  var time;
  this.at.cmd('AT+PING="'+addr+'"\r\n',1000,function cb(d) {
    if (d && d[0]=="+") { time=d.substr(1); return cb; 
    } else if (d=="OK") callback(time); else callback();  
  });
}

but I'll see about adding that to the Espruino WiFi library.

I'm afraid I can't see a way of getting the default gateway address - but if you figure out how to get it from the ESP8266 via AT commands then I'm happy to add that.

---

Posted at 2017-10-18 by Sacha

You are always helpfull Gordon. This is the reason why i like to be a patreon.

Sacha

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Posted at 2017-10-19 by @gfwilliams

Thanks! :)

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Posted at 2018-01-08 by @gfwilliams

Just to add - this is now part of the Espruino WiFi library - wifi.ping

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Posted at 2018-07-30 by Denis

Dear Grodon, I use wifi.ping with setInterval under v1.96 and NodeMCU, it have memory leak in case if I use callback function and function wifi.ping always return undefined. It's NodeMCU issues?

setInterval(function(){
    console.log(wifi.ping("192.168.2.1", function(b){
      //console.log(b);
    }));
    console.log(process.memory().free);
  }, 5000);

result:

undefined
1371
undefined
1303
undefined
1218
undefined
1134
undefined
1061
undefined
976
undefined
891
undefined
806
undefined
721
undefined
636
undefined
551
undefined
466
undefined
381
undefined
296
undefined
211
undefined
126
undefined
41
Execution Interrupted
New interpreter error:
Execution Interrupted

---

Posted at 2018-07-31 by @gfwilliams

Yes, it looks likely it's an ESP8266 bug (however that's a lot of data to be leaked - are you sure you're not running other code as well?)

Please can you post this in the ESP8266 forum and carry on there? You're more likely to be able to get help there as I don't know the internals of the ESP8266 port that well.

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Posted at 2018-07-31 by Denis

Yes, Grodon, I recheck it and run only this code(see below) and have same result.
I posted this in the ESP8266 forum: http://forum.espruino.com/conversations/323848/
Thank you.

var wifi = require("Wifi"); wifi.stopAP(); function onInit() {   wifi.connect("ssid", {password: "password"});   setInterval(function(){
    console.log(wifi.ping("192.168.2.1", function(b){
      //console.log(b);
    }));
    console.log(process.memory().free);   }, 5000); }