As new versions of the WiFi101 library come out, you may end up getting a complaint that the library and WINC1500 firmware are out of sync:

No problem - you can update the firmware through your Arduino/compatible! You must use a 1.8.x version of Arduino IDE. See the orange box below. Start by loading up the FirmwareUpdater sketch

You must do this update using a 1.x version of the Arduino IDE. Go to and scroll down to find "Legacy IDE (1.8.X)" and download the latest 1.8.x version of the Arduino IDE.
If you are using a Feather M0 or WINC1500 breakout, don't forget to update the pins as necessary with setPins()!

If you are using a WiFi101 or WINC1500 shield, you do not have to add setPins() code

Upload it to your board. Make sure the Serial console is not open before or after uploading.

Then select the Updater tool built into the IDE

Select the right COM port, and click Test Connection

If all is good you'll get a confirmation

Next, select the firmware - we of course recommend the latest version!

If you don't see the right/matching version you may need to update the IDE

Once you feel ready - make sure the USB cable is connected solidly! Click Update Firmware

And a minute or two later...

Now you're ready to rock! Reload the Firmware Check sketch from before, this time you will see:

This guide was first published on Jan 20, 2016. It was last updated on Jul 15, 2024.

This page (Updating Firmware) was last updated on Jul 15, 2024.

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