ΒΆ Update
The official firmware for UNO R4 WiFi gets regular updates, bringing new features and improved libraries. The firmware preloaded on ELEGOO UNO R4 WiFi is older. If you wish to use the latest features and libraries, please update the firmware manually. I will show you how to do it step by step.
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Step 1: Connect your ELEGOO UNO R4 WiFi to the computer.
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Step 2: Launch the Arduino IDE.
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Step 3: Navigate to Tools > Firmware Updater > Select Board, then choose UNO R4 WiFi from the drop-down list.
Select the firmware version you need and click the Install button. The update will finish in 3 to 5 minutes.