EspruinoWifi.js getIP()

[espruino-discuss3]

Posted at 2016-09-25 by Ollie

Is require("EspruinoWifi").getIP() implemented? I can see the method in the module but it errors for me. Also wifi.scan() seems not to return anything. I know the Espruino Wifi is very new, so just wondered what to expect in terms of this module at the moment?

[espruino-discuss3]

Posted at 2016-09-25 by ClearMemory041063

This might help.
http://forum.espruino.com/conversations/286139/#comment12965959

The syntax is different on different implementations for some reason.

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Posted at 2016-09-26 by @gfwilliams

Yes, that could be it. Or what's the erroir?

Basically because the Wifi is separate on the Espruino WiFi it can take time for it to respond - so pretty much every function has to be async.

It should behave like a Pico + ESP8266, but I changed the API a little to try and bring everything into line a little more (currently every implementation of the network API is slightly different)

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Posted at 2016-09-26 by Ollie

Thanks Gordon.

wifi.getIP() gives me this error:

>wifi.getIP()
=undefined
Uncaught Error: Function "a" not found!
 at line 1 col 165
...ce(15,-1);else if("OK"==d){a(null,b);return}return h}
                              ^
in function "b" called from line 1 col 25
d=void 0;var f;b&&(f=b(a))?(d=p,b=f):clearTimeout(e);void 0=...
                        ^
in function "d" called from line 1 col 324
...c&&(e[c](k),n=!0);n||d&&d(k)}a=a.substr(f+1);"\n"==a[0]&&(a=...
                              ^
in function called from system
Uncaught Error: Function "a" not found!
 at line 1 col 15
if(void 0===d)a("Timeout");else{if("+CIFSR:STAIP"==d.substr(...
              ^
in function "b" called from line 1 col 15
d=void 0;b&&b()
              ^
in function called from system

wifi suggests maybe callback is required:

>wifi
={
  "connect": function (a,b,c) { ... },
  "disconnect": function () { ... },
  "getIP": function (a) { ... },
....

But this returns null:

>wifi.getIP(function(d){console.log(d);})
=undefined
null

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Posted at 2016-09-26 by Ollie

Thanks for this i shall look through this also

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Posted at 2016-09-26 by Ollie

Thanks @ClearMemory041063, I can see now, the callback has some additional params. I should have picked that up from the module it is in the comments.

This will also apply to wifi.scan() looking at it.

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Posted at 2016-09-26 by Ollie

It does mean that there's some portability issues back to ESP8266 (assuming the code can fit), since the callback seems to just include the a single argument 'data' there..

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Posted at 2016-09-26 by @gfwilliams

I know. I wonder whether we should change the ESP8266 version - I wonder whether very many people use the callback form anyway.

The Pico + ESP8266 code behaves the same way as the Espruino WiFi code, as do pretty much all the other functions (like this]. It seems it'd be more confusing to have just one or two functions that didn't (especially when that seemed to be the general form of callbacks for a lot of Node.js libraries as well).

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Posted at 2016-09-26 by Ollie

On the ESP8226, personally, I don't, I just access the returned object property. But I appreciate this can't be the case with Espriuno + ESP8266. I think a common Wifi API (however the methods must be implemented to make things work), is a good idea though. Save on the confusion and allow script portability where possible. Even when using ESP8266 I've found also running code on the core boards extremely useful to check if an issue is me or a limitation of Espruino on ESP8266.