Newby question

[espruino-discuss]

Posted at 2016-07-22 by ghendo

I have Espurino running on a Wemos D1 mini (finally)
I have a question about the IDE
After installing and configuring OTA connection the wifi setup seems to
stay there even after I upload a new simple test program without any wifi
connection commands

So does this mean the OTA wifi connection is stored in a secret place
that I cant see and I just add my extra bit ?
What if I wanted to change the wifi configuration that is stored in the secret place?

[espruino-discuss]

Posted at 2016-07-22 by @gfwilliams

Moving this to the ESP8266 forum

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Posted at 2016-07-22 by DrAzzy

Yes, it auto connects once you've configured the wifi and saved it (see http://www.espruino.com/ESP8266_Flashing where they describe configuring the wifi, you save with wifi.save() ). Which is good, since you want it to come up in wifi mode so you can connect via telnet console

It is stored in different place on the flash.

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Posted at 2016-07-23 by ghendo

Thanks for the reply!
My next question is when I put in a simple hello world http if I unplug the device then plug it in it doesn't seem to start the http and I have resend the code to make it work again I tried setting the communication setup to keep the code but then it shows an error when I try to load the code

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Posted at 2016-07-23 by @allObjects

@ghedo, pls take a look at this conversation, especially posts #8 and #18. They shed some light on what is going on when you upload code, save(), and re-power/power cycle your device.

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Posted at 2016-07-23 by ghendo

hmm things get very complicated very quickly

I tried

var http = require("http");

function onInit(){
http.createServer(function (req, res) {
res.writeHead(200);
res.end("Hello World");
}).listen(8080);
}

but didnt work :(

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Posted at 2016-07-24 by ghendo

sorry just to be clear in the right hand side of IDE I put
var http = require("http");

function onInit(){
http.createServer(function (req, res) {
res.writeHead(200);
res.end("Hello World");
}).listen(8080);}
onInit();

then in left hand side I type
save()
then I repower the device and find doesnt work

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Posted at 2016-07-24 by tve

To change the saved wifi settings you set the config up and the run wifi.save().
Did you take a look at http://www.espruino.com/ESP8266_WifiUsage ?

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Posted at 2016-07-24 by ghendo

Thats ok
At the moment I feel the onInit() function is just not running on power up
no matter what I do. if I power up then dump() the code is there but it just doesnt run on power up/reset.

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Posted at 2016-07-24 by tve

Mhh, I haven't used onInit... looking...

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Posted at 2016-07-24 by tve

I'm not sure what exactly is happening, but it may be that onInit() gets called before the networking code is fully initialized. The following will do what you're looking for:

var http = require("http");

function server() {
  http.createServer(function (req, res) {
    res.writeHead(200);
    res.end("Hello World");
  }).listen(8080);
}

function onInit() {
  Serial2.write("onInit\n");
  setTimeout(server, 1000);
}

The Serial2.write appears on uart1 (as opposed to the normal uart0) where the log messages are. You can remove that, I used it to see when onInit runs.

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Posted at 2016-07-24 by ghendo

oh god it worked!
So, need to wait a bit before starting it up.
Thanks so much

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Posted at 2016-07-24 by tve

You're welcome. It's not ideal and I should look into it, but at least it works...