Blynk Provisioning fails with Arduino Core Master Branch

Need Help With My Project
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@Dmitriy @vshymanskyy @BlynkAndroidDev your Blynk provisioning sketch within the Arduino IDE and at https://github.com/blynkkk/blynk-library/tree/master/examples/Export_Demo/Template_ESP8266 appears to fail with the master branch of the Arduino core.

As a follow up to this thread Connect nodemcu to a wifi network using blynk I tried for almost a day to provision an ESP, but failed. See Serial Monitor below:

[555] Hardware v1.0.1
[555] Firmware v0.4.8
[2230] AP SSID: TrackioT App
[2230] AP IP:   192.168.4.1
[2231] AP URL:  theCHARioT.co.uk
[105898] WAIT_CONFIG => CONFIGURING
[106942] WiFi SSID:  Pass: 
[106942] Blynk cloud:  @ :
[106942] Configuration invalid
[107050] WiFi SSID:  Pass: 
[107050] Blynk cloud:  @ :
[107050] Configuration invalid
[108321] CONFIGURING => WAIT_CONFIG
[1949737] WAIT_CONFIG => CONFIGURING
[1970123] WiFi SSID:  Pass: 
[1970123] Blynk cloud:  @ :
[1970123] Configuration invalid
[1970173] WiFi SSID:  Pass: 
[1970173] Blynk cloud:  @ :
[1970173] Configuration invalid
[2014790] CONFIGURING => WAIT_CONFIG

As you will see it is failing to accept the SSID and PASSWORD of the router.
Tried several ESP’s, 2 routers, various locations around my house, 0.4.7 and 0.4.8 plus 2.14.5 and 2.14.6.

Having previously provisioned ESP’s with your sketch I was at a loss to what the issue was.
Then I remembered that my main system has been upgraded to the latest master branch of the Arduino core since I last used provisioning.

This morning I used another computer that is still using 2.3.0 core and it worked first time.

No idea what the issue is but I know you have things like DNSServer.h and much has changed over the last 12 months since 2.3.0 was released.

Have you used the master branch or even 2.4.0-rc1 with provisioning?

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This is a known bug in arduino core for esp, they will fix it. We have implemented a workaround in android - which will come with one of next releases.

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@vshymanskyy do you know if the ESP bug was introduced in 2.4.0-rc1 or is it just in the master?

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2.4.0-rc1 as well

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@vshymanskyy could you please provide a link or similar to the ESP8266 Arduino Core problem?

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Sorry you’ll have to search for it. I opened one but then closed as it was duplicate.

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@vshymanskyy a few days ago I spent 1 hour looking through open and closed issues on the ESP8266 GitHub but couldn’t find anything that appeared to tie up with this.

Can you suggest a search term from memory that might have been used when the issue was raised?

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@Costas https://github.com/esp8266/Arduino/issues/3400

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Thanks @vshymanskyy I’ll test the commit with our provisioning.

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I can confirm that the pending commit at https://github.com/esp8266/Arduino/pull/3398/commits/e800cd0b603050d313874880c220bb5db160c889 fixes Blynk Provisioning for the master branch of ESP8266 Arduino core.

You will have to do the changes manually until such time as the pending commit is included in a release / the master branch.

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The commit is now in the master branch https://github.com/esp8266/Arduino/pull/3398/commits

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