Comments on: ESP32 OTA (Over-the-Air) Updates – ElegantOTA Library with Arduino IDE

By: Cristian

Cristian — Sun, 22 Jun 2025 22:23:54 +0000

Hi, i havent been able to set the authentication, i think i have tried everything, i am doing the sethAuth… But was never anle to make it work, any thought?

By: ade

ade — Fri, 20 Jun 2025 20:06:55 +0000

In reply to Ayush.

Good work.
I came across the library, and I tried to test it on wemos d1 mini.
but it’s showing MD5 mismatch error when uploading reach 100%.
what can be the issue and how to solve it.
thanks.

By: Rrr

Rrr — Wed, 14 May 2025 03:33:45 +0000

Hello, this post is about ESP32 flashing its own flash memory. How to make one ESP32[1] flash a second ESP32[2]?

I believe that in the case that an ESP32[1] can program another ESP32[2] (perhaps using the serial port), it is possible to send the firmware without the OTA part, so that an ESP32[1] will always have its firmware preserved as an “ESP32 programmer”

By: Leo Duivenvoorde

Leo Duivenvoorde — Sun, 06 Apr 2025 09:01:46 +0000

In reply to Dan.

Initially, it was indeed at the wrong place: above , which I normally do not use. I commented the line out, but same problem (no WiFi.h present) kept coming back. Today, I restarted the computer and problem did not come back.

But, I noticed that now the IDE used the WiFi,h from :
Multiple libraries were found for “WiFi.h”
Used: C:\Users\leodu\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.2.0\libraries\WiFi
Not used: D:\LEO\OneDrive\Documenten\Arduino\libraries\WiFi

So, the problem is solved.
But, at hindsight, I do sometimes notice that I have to reboot the computer after compilations-errors in order to clear a problem; just like something remains in memory.

Also: Is there a way I can store all the libraries and packages on one single drive/location? This is much easier for back-ups etc.

But, any way, thanks for your help.

With best regards,
Leo

By: Dan

Dan — Sat, 05 Apr 2025 16:58:51 +0000

hi, it sounds like a syntax error ( a {, }, ; missing) or your new line is not at the right place, Is it a global value ?

By: Sara Santos

Sara Santos — Sat, 05 Apr 2025 14:18:19 +0000

In reply to Leo Duivenvoorde.

Hi.
Do you have an ESP32 board selected in Tools > Board?
Regards,
Sara

By: Leo Duivenvoorde

Leo Duivenvoorde — Sat, 05 Apr 2025 13:21:34 +0000

Hello,

I have made a sketch with the OTA -things in there as described in your article. It worked great.
Today I opened the same sketch again. Compiled it OK in Arduino IDE 2.3.5.
Then I just added the line ” String fileName = “Test-OTA-Blink”; “. And tried to complile it. But now I get the message that the WiFi.h library is not there. (Just 1 minute before this it compiled OK.) WiFi.h is present in my sketch-folder: myDocs/Arduino/Libraries/WiFi/src/

Can you explain this?

With best regards,
Leo

By: Sara Santos

Sara Santos — Fri, 28 Mar 2025 17:37:00 +0000

In reply to Tapio.

Hi.
Yes.
You can share it in our group.
Also, don’t forget the merit to the library’s creator.
Regards,
Sara

By: Tapio

Tapio — Fri, 28 Mar 2025 10:39:49 +0000

Greetings from Finland! This is a fantastic example - it worked flawlessly right out of the box! I've extended it by adding a remote serial debugging tool (together with helpfull AI tools (DeepSeek and GitHub Copilot). Would you be open to me sharing this improved version in the Random Nerd Tutorials Facebook community when it's ready? I'll of course give full credit to your original implementation. Thank you for sharing such a well-designed and practical example - it's been incredibly helpful!"

By: Forrest Erickson

Forrest Erickson — Fri, 21 Mar 2025 13:05:45 +0000

Update this page with a “favicon.png” or refer us to another tutorial

Hello RNTs,
The example index.html code calls out a favicon in the header.

Could you add that file to this project tutorial or refer us to another of your tutorials (or make one) what explains favicon?