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You may need to do a firmware update on the reader. Please make sure you are running the most recent version of the Square App on your device before attempting this, and I usually suggest forgetting the reader and disconnecting Bluetooth.
To Reset the Reader, and force the firmware update:
To do so:
If the reader lights turn on, you’re all set. If the lights don’t turn on, please try again and make sure to firmly press and hold the reader’s button for a full 20 seconds.
Once the lights are back on your reader, you'll want to re-pair it with your App, allowing any other updates to run.
If this doesn't work, you'll want to reach out to our Customer Success team so they can help you further.
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