Comments for Random Nerd Tutorials

Comment on ESP32 MQTT – Publish DS18B20 Temperature Readings (Arduino IDE) by Dani

Dani — Wed, 18 Mar 2026 22:51:31 +0000

In reply to Sara Santos.

Thank you for your quick response. Yes, there is a green “connected” message.

Comment on ESP32-S3 DevKitC Pinout Reference Guide: GPIOs Explained by Dave Fischer

Dave Fischer — Wed, 18 Mar 2026 21:01:19 +0000

Never mind – figured it out – use the one labeled COM.

Comment on ESP32-S3 DevKitC Pinout Reference Guide: GPIOs Explained by Dave Fischer

Dave Fischer — Wed, 18 Mar 2026 20:38:21 +0000

Probably a dumb question – which USB-C port is used for programming with Arduino IDE on host PC? Thanks.

Comment on ESP32: Guide for MicroSD Card Module using Arduino IDE by Kees

Kees — Tue, 17 Mar 2026 20:28:06 +0000

Hi Sara,

Thank you for your very quick reply.
I must honestly admit that this problem could have easily been avoided afterwards
if I had first selected the ESP32 board in the Board Manager.
At that moment it was still set to Arduino Nano.
I found out this issue after going through the installation procedure you mentioned
(https://randomnerdtutorials.com/installing-esp32-arduino-ide-2-0/).
It also turned out that I had already performed that installation in the past.
Solved this (experiential) issue.

Comment on Installing ESP32 Board in Arduino IDE 2 (Windows, Mac OS X, Linux) by Sara Santos

Sara Santos — Tue, 17 Mar 2026 16:32:02 +0000

In reply to ms otis.

Hi.
The onboard LED of the ESP32 C3 Super Mini is connected to GPIO 8 and not GPIO 2 (like most boards).
You can check our specific tutorial for the ESP32 C3 Super Mini here: https://randomnerdtutorials.com/getting-started-esp32-c3-super-mini/

Regards,
Sara

Comment on ESP32 OTA (Over-the-Air) Updates – AsyncElegantOTA (VS Code + PlatformIO) by Sara Santos

Sara Santos — Tue, 17 Mar 2026 16:29:05 +0000

In reply to David Lowther.

Hi.
The owner of the library marked it as deprecated.
So, it is better to switch to the new version of the library.
We still didn’t have the time to experiment with this new version and update the tutorial. I’m sorry about it.

The new version of the library provides a demo example that you can use to add to your projects: github.com/ayushsharma82/ElegantOTA/tree/master/examples

We’ll try to take a look at this issue soon.

Regards,
Sara

Comment on ESP32 MQTT – Publish DS18B20 Temperature Readings (Arduino IDE) by Sara Santos

Sara Santos — Tue, 17 Mar 2026 16:24:35 +0000

In reply to Dani.

Hi.
In your Node-RED flow, do you have a green “connected” message under the MQTT nodes?

Regards,
Sara

Comment on Installing ESP32 Board in Arduino IDE 2 (Windows, Mac OS X, Linux) by ms otis

ms otis — Tue, 17 Mar 2026 16:23:53 +0000

hello fledgling to esp following your tutorial Stumbled

Arduino 2 down loaded . copied your led 2 flash code to sketch downloaded to esp32 – C3 ” super mini ”
no error report . LED on board doesnt flash ? oooh still excited any ideas?
ms O

Comment on ESP32 Web Bluetooth (BLE): Getting Started Guide by Sara Santos

Sara Santos — Tue, 17 Mar 2026 16:20:08 +0000

In reply to Joefarmer.

Hi again.
Thank you so much for the clarification and taking your time to explain this to me.
I’ll update the tutorial.

Regards,
Sara

Comment on ESP32: Guide for MicroSD Card Module using Arduino IDE by Sara Santos

Sara Santos — Tue, 17 Mar 2026 16:18:00 +0000

In reply to Kees.

Hi.
The library FS.h that we use in this tutorial is included by default when you install the ESP32 boards in your ARduino IDE.
You don’t need to install any library.
Just make sure you have the ESP32 boards installed in your Arduino IDE: https://randomnerdtutorials.com/installing-esp32-arduino-ide-2-0/
And when compiling or uploading your code, make sure you select an ESP32 board in Tools > Board.

Let me know if you can solve the issue.

Regards,
Sara