Fixing the Arduino R4 WiFi firmware update fail

Official Hardware Classic UNO R4 WiFi
1

I am creating this to hopefully help someone who is experencing the same issues I was. I found a solution, and wanted to share what I did (simple as it is).
My fix for the Arduino R4 WiFi "Installation failed. Please try again." is as follows:

  1. Create a new sketch.
  2. Upload that sketch without adding anything to it.
  3. Try the firmware upload again.

After trying countless times to get it to work, this is what ended up saving me. I want to make it clear this is not a fix all cases kind of thing, but just something that worked for me!

2

Thanks for sharing the info. There is a more reliable method for updating firmware.

Here is some reference information for updating firmware:
https://support.arduino.cc/hc/en-us/articles/9670986058780-Update-the-connectivity-module-firmware-on-UNO-R4-WiFi

Use the Firmware Updater in Arduino IDE

Updating the connectivity firmware is easy when using the Firmware Updater in Arduino IDE 2.2.1 or later.

Follow these steps:

  1. Connect the board to your computer and open Arduino IDE 2.
  2. If the Serial Monitor is open, close it.
  3. In the top menu bar, open Tools > Firmware Updater.

To avoid the error "Installation failed. Please try again." when updating the firmware, you need to execute "2. If the Serial Monitor is open, close it.".