Comments on: ESP8266 NodeMCU OTA (Over-the-Air) Updates – ElegantOTA Library with Arduino IDE

By: Jacques Bourgouin

Jacques Bourgouin — Sun, 23 Mar 2025 21:16:56 +0000

Hello,
I have succeeded to use ElegantOTA to reprogram the firmware of a ESP8266 via OTA.
How do you get a .bin file for the /data containing index.html, *.js .. ?
I did see this information in your examples
Thanks

By: Sara Santos

Sara Santos — Sat, 15 Mar 2025 10:36:28 +0000

In reply to Dave Z.

Hi.
Thanks for the info.
But, I’m also not sure how to do that in Arduino IDE.
Regards,
Sara

By: Dave Z

Dave Z — Sat, 15 Mar 2025 06:26:18 +0000

A more “Elegant” way to than ” #define ELEGANTOTA_USE_ASYNC_WEBSERVER 1 ” is to use a build flag ” build_flags = -D ELEGANTOTA_USE_ASYNC_WEBSERVER=1 “, this has the advantage of not needing to be redone if the library is updated. (I do not use Arduino, not sure if you can use Build Flags in Arduino?)

By: Martin Eggers

Martin Eggers — Thu, 16 Jan 2025 20:12:27 +0000

Hi folks,

after fumbling around with Arduino Nano and NodeMCU for some small projects years ago, I recently rediscovered the Arduino IDE on my laptop, installed 2.3.4 today and decided, to do some samples with stuff a bit newer to see, how things go. I had downloaded AsyncElegantOTA and LittleFS previously, but never really used it for anything. But I remember, that your samples then at least worked.

After getting compiler-errors with my existing (though updated) libs, I installed the libs you listed above, but can’t even get the unchanged (beside SSD+Pass) above first sample to compile:

— exit with err 1 —
c:\Users\Kunde\Documents\Arduino\libraries\ElegantOTA\src\ElegantOTA.cpp: In lambda function:
c:\Users\Kunde\Documents\Arduino\libraries\ElegantOTA\src\ElegantOTA.cpp:80:71: error: ‘FS_end’ was not declared in this scope; did you mean ‘va_end’?
80 | uint32_t update_size = mode == OTA_MODE_FILESYSTEM ? ((size_t)FS_end – (size_t)FS_start) : ((ESP.getFreeSketchSpace() – 0x1000) & 0xFFFFF000);
| ^~~~~~
| va_end
c:\Users\Kunde\Documents\Arduino\libraries\ElegantOTA\src\ElegantOTA.cpp:80:88: error: ‘FS_start’ was not declared in this scope; did you mean ‘va_start’?
80 | uint32_t update_size = mode == OTA_MODE_FILESYSTEM ? ((size_t)FS_end – (size_t)FS_start) : ((ESP.getFreeSketchSpace() – 0x1000) & 0xFFFFF000);
| ^~~~~~~~
| va_start

exit status 1

So what exactly is my problem here? (Sorry, if this is some kind of beginner’s problem, but that’s, what I am >:-)

regards
Martin

By: Sara Santos

Sara Santos — Sat, 04 Jan 2025 10:56:21 +0000

In reply to Mike Oshinski.

Hi.
I think this example already restarts the board after a new sketch is uploaded via OTA.
Regards,
Sara

By: Mike Oshinski

Mike Oshinski — Fri, 03 Jan 2025 18:06:07 +0000

Hi Sara,
I tried the ElegantOTA on both the ESP32 and ESP8266 and they both work great, but I have one question. Do you know an easy way to reset the ESP after downloading the binary code? It must be reset before the new download will begin executing. I am trying to avoid a physical access to the device (that’s why we have OTA).
I tried some HTTP string to initiate an ESP_Restart() but I am having trouble with that.

Maybe y0ou have a good solution. Please advise.

Thank You
Mike Oshinski
NC, USA

By: Sara Santos

Sara Santos — Mon, 23 Dec 2024 11:11:58 +0000

In reply to janis.

Thanks for noticing.
It’s fixed now.
Regards,
Sara

By: janis

janis — Sun, 22 Dec 2024 22:52:21 +0000

// Route for root / web page
server.on(“/”, HTTP_GET, [](AsyncWebServerRequest *request){
request->send(200, “text/html”, index_html, processor);
});
need send_P

By: Sara Santos

Sara Santos — Fri, 20 Dec 2024 11:13:40 +0000

In reply to Ceka.

Hi.
Thanks for letting me know.
It’s fixed now.
Regards,
Sara

By: Ceka

Ceka — Thu, 19 Dec 2024 22:32:11 +0000

There is no code in the first code-block in this chapter: “ElegantOTA ESP8266 Basic Example” and the button “View raw code” leads only to the top of the page.