avrdude ser open can't open device COM4 The system cannot find the file specified

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Published on January 28, 2025 9:03:28 AM ● Video Link: https://www.youtube.com/watch?v=B9ht00w3N0o

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Are you getting the "avrdude: ser_open(): can't open device COM4 – The system cannot find the file specified" error while uploading code to your Arduino? 🤔 This usually happens when the USB port changes, and the COM port gets reassigned.

📌 In this video, I'll show you how to:
✔ ️ Check and select the correct COM port
✔ ️ Choose the right Arduino board
✔ ️ Fix the upload issue in just a few steps

💡 Why does this error happen?
Windows assigns a new COM number when you plug your Arduino into a different USB port. If you don’t update it in Arduino IDE, it tries to upload to the old port, causing this error.

🔥 Steps to fix it:
1️ ⃣ Open Arduino IDE
2️ ⃣ Go to Tools Port and select the correct port
3️ ⃣ Go to Tools Board and choose your Arduino model
4️ ⃣ Click Upload and your code should work!

🚀 Now your Arduino is ready to go!

💬 Still facing issues? Drop a comment below, and I’ll help you out!
👍 Like, Share & Subscribe for more Arduino tutorials!
#Arduino #ArduinoIDE #COMPortError #FixArduino #ArduinoTutorial #TechFix
If this helps, hit that like button and subscribe for more easy tech fixes! 🙌
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