If you are getting errors like this while installing ESP32 boards in Arduino IDE:

This happens because the default network timeout in Arduino CLI is too low for slow or unstable connections.

Step 1: Locate arduino-cli.yaml

Arduino IDE uses Arduino CLI internally, and its config file controls network behavior.

Default locations:

Linux

~/.arduino15/arduino-cli.yaml

macOS

~/Library/Arduino15/arduino-cli.yaml

Windows

C:\Users\YOUR_NAME\AppData\Local\Arduino15\arduino-cli.yaml

If the file does not exist, create it.

Step 2: Edit the File

Open the file:

nano ~/.arduino15/arduino-cli.yaml

Add this:

network:
  connection_timeout: 1200s

Step 3: Restart Arduino IDE

Completely close Arduino IDE and open it again.

Try to install again ⬇️