Arduino Error Messages

Getting errors is a part of programming life! Understanding what different Arduino IDE errors mean can be challenging. These posts are dedicated to helping you bust through those sometimes cryptic error messages! Good luck!

How to Add Python Packages in Arduino AppLab (No pip install needed)

If you’re building Python apps with the Arduino UNO Q and Arduino AppLab, you might wonder how to add third-party packages. You don’t run pip install manually – it’s even easier than that. Just use a requirements.txt file All you…

How to Fix Arduino Nano ESP32 Upload Issues

Are you struggling to upload code to your Arduino Nano ESP32? You’re not alone! Many users experience frustrating errors such as: If you’ve already tried common troubleshooting steps like double-tapping the reset button and still can’t get it to work,…

A fatal error occurred: Unable to verify flash chip connection #ESP32

Are you getting this error while trying to upload code to some generic ESP32 clone? A fatal error occurred: Unable to verify flash chip connection (Invalid head of packet (0xE0): Possible serial noise or corruption.). Failed uploading: uploading error: exit…

arduino_secrets.h: No such file or directory [SOLVED]!

Is the arduino_secrets: No such file or directory error giving you heck? By the end of this video, you’ll understand: I know you have secrets. I mean – we all do.   Like that time I buried that guy alive in…

Arduino Giga Red LED (of death) blinking?

Windows machines have the blue screen of death… MacOS has the spinning beach ball of death… And the Arduino Giga has the red blinking LED of death. Here are the symptoms: Can this be fixed?  Is your Arduino Giga board…

expected declaration before ‘}’ token [SOLVED]

Compilation error: expected declaration before ‘}’ token Why the heck does the Arduino IDE expect a declaration before ‘}’ token?!  Are you scratching your head wondering what the heck this error even means? Fret not – this is a super…

Compilation error: expected ‘;’ before [SOLVED]

Compilation error: expected ‘;’ before … Does this error message have you scratching your head?  What’s the deal with the semi-colon? What about the squiggly lines in the error message, what does that mean? Well, you’re not alone, because this…

dfu-util: No DFU capable USB device available [Solved]

dfu-util: No DFU capable USB device availableFailed uploading: uploading error: exit status Are you getting these “No DFU” and “exit status 74” error when trying to upload to your Arduino Nano ESP32? Don’t fret!  You didn’t do anything wrong, and…

Failed uploading: no upload port provided | SOLVED

Did you just plug in your new Arduino board and get this error message: Failed uploading: no upload port provided? or maybe… No device found on <blah-blah-port>Failed uploading: uploading error: exit status 1 or dfu-util: No DFU capable USB device…

Variable Scope | Fix error: ‘yourVariable’ was not declared in this scope? | SOLVED

Are you getting the error: ‘YourVariable’ was not declared in this scope? What is variable scope anyway? Isn’t Scope a brand of mouthwash?  I mean, what gives? In this lesson, we are going to talk SUPER BASICALLY about variable scope.…