Comments on: ESP32: Save Wi-Fi Credentials in a Separate File (and Other Sensitive Information)

By: Sara Santos

Sara Santos — Wed, 26 Nov 2025 11:14:51 +0000

In reply to Blaine.

Thanks for sharing that solution for VS Code.
Regards,
Sara

By: Blaine

Blaine — Tue, 25 Nov 2025 14:56:34 +0000

In reply to Kamil.

This can be achieved in PlatformIO. VS Code and PlatformIO is all I use now.

Create a file somewhere outside your project folder like “C:\dev-secrets\wifi_credentials.h”. Added something like this to that file.

#define MY_SSID "my_ssid" #define WIFI_PASS "password"

Then add this build flag in your platformio.ini.

build_flags =
-I C:/dev-secrets

Now you can include that file in your project.

#include “wifi_credentials.h”

By: Ed

Ed — Tue, 25 Nov 2025 12:37:09 +0000

In reply to Kamil. I am no platformio expert but I would think that can pull in xxxx.h files just as easy, so in my opinion it would work the same, but maybe a true Platformio expert can shine a light on it

By: Kamil

Kamil — Mon, 24 Nov 2025 20:24:27 +0000

Very nice and interesting Arduino topic and clear explanation.
But, what about VS Platformio. There is not header file MyLogin.h located in my PC only and in case of publishing whole project, this file could be revealed.

By: Sara Santos

Sara Santos — Thu, 13 Nov 2025 16:20:37 +0000

In reply to Ed.

Yes, it’s a good alternative.
Thanks for the suggestion.
Regards,
Sara

By: Ed

Ed — Wed, 12 Nov 2025 13:03:58 +0000

Rather than having to change the ‘comment_out’ in the .h file, it might be easier to put the various sections (home, on the road, parents) in an IFDEF structure and when compiling the main ino file just add a line *define HOME” etc…

By: Sara Santos

Sara Santos — Sat, 08 Nov 2025 11:02:45 +0000

In reply to Blaine.

Thanks for your support.
Regards,
Sara

By: Sara Santos

Sara Santos — Sat, 08 Nov 2025 10:58:25 +0000

In reply to Gunther Jordan.

Hi.
No need to apologize and thank you for sharing your feedback.
New ideas are always welcome.
Regards,
Sara

By: Sara Santos

Sara Santos — Sat, 08 Nov 2025 10:55:00 +0000

In reply to Gunther Jordan.

Hi.
I’m sorry.
That was not our intention.
We were just showing one of the many ways you can do so that you don’t have to always have to write your credentials in all sketches.
I know it may seem basic and simple, but many beginners don’t know how to do it.

However, yours is a good suggestion. Maybe I’ll try to implement something like that, inside LittleFS in a future tutorial.
Regards,
Sara

By: Blaine

Blaine — Sat, 08 Nov 2025 03:02:00 +0000

In reply to Blaine. You're right. My apologies. Not sure why that hit a nerve. Love this site!