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Troubleshoot Bluetooth pairing on Square Reader for contactless and chip

Square Reader for contactless and chip (1st and 2nd generation) pairs to your mobile device through Bluetooth connectivity. This article provides troubleshooting for your Square Reader for contactless and chip (1st and 2nd generation) to address issues pairing the Square Reader to your device.

Learn how to Configurar Square Reader sin contacto y con chip.

Before you begin troubleshooting

When to troubleshoot

Square Reader pairing troubleshooting involves steps that include checking your setup, accessing your Bluetooth settings, and rebooting your Square Reader. If at all possible, try to troubleshoot your Square Reader after hours. If you must troubleshoot during the workday, try to avoid peak busy hours so your customers will experience few delays.

Required components

You need your Square Reader and your mobile device. If you have multiple mobile devices that you connect your Square Reader to, you need those as well. Troubleshooting pairing on multiple devices requires you to reset the Bluetooth state on each device.

Identify your Square Reader

Square Reader sin contacto y con chip (1.ª generación)

Square Reader sin contacto y con chip (1.ª generación) tiene tres versiones:

  • Square Reader sin contacto y con chip (1.ª generación, v1)
  • Square Reader sin contacto y con chip (1.ª generación, v2)
  • Square Reader sin contacto y con chip (1.ª generación, v3)

Square Reader sin contacto y con chip (1.ª generación) tiene un puerto de carga micro USB y el botón de encendido está a la izquierda del puerto.

Square Reader etiquetado

Square Reader para tarjetas sin contacto y con chip (2.ª generación)

Square Reader sin contacto y con chip (2 .ª generación) tiene una versión:

  • Square Reader sin contacto y con chip (2.ª generación, v1)

Square Reader sin contacto y con chip (2.ª generación) tiene un puerto de carga USB-C y el botón de encendido está a la derecha del puerto.

Square Reader (2.ª generación) etiquetado

Consulta la compatibilidad con los pagos sin conexión por generación y versión del Square Reader sin contacto y con chip

  • Square Reader para tarjetas sin contacto y con chip (1.ª generación, v1) no puede aceptar pagos sin conexión.
  • Square Reader para tarjetas sin contacto y con chip (1.ª generación, v2) no puede aceptar pagos sin conexión.
  • Square Reader para tarjetas sin contacto y con chip (1.ª generación, v3) acepta pagos sin conexión.
  • Square Reader para tarjetas sin contacto y con chip (2.ª generación, v1) acepta pagos sin conexión.
If you have pending offline payments, do not restart or factory reset your Square Reader or delete the Square POS app. Pending offline payments will be permanently lost, and the funds won’t be captured. Learn how to Process offline payments.

Step 1: Check your Square Reader for contactless and chip setup

Check device and OS compatibility:

  1. Make sure your mobile device is compatible with the Square Reader (generation and version) you are pairing. Go to Square’s compatibility page for devices to search your device.
  2. The compatibility page also lists the minimum supported version of your device’s Operating System (OS). Make sure your device is running a supported OS version. If you are already on a minimum accepted version, continue to the next step in the troubleshooting guide. Make a note to update your device’s OS outside of business hours, as the process can take a long time.

Check your Point of Sale version:

Make sure you’re using the most recent version of your Square POS app. Check for updates in the App Store or Play Store.

Verify network connectivity:

Make sure your mobile device is connected to the internet. This is required for the Square POS apps to authenticate your Square Reader and check for firmware updates.

Charge your battery:

Fully charge your Square Reader. Make sure green lights show up when you press the reader’s button once. Do not hold down the button for longer than 1 second to check the battery level.

Check your Square Reader and POS device placement:

  1. Make sure there is no metal interference between your Square Reader and your mobile device. Metal can act like a barrier or a mirror, causing issues with the Bluetooth signal.
  2. Make sure your Square Reader is within 10 feet of your mobile device. If the distance is larger, the Bluetooth connection may be out of range and could disconnect.

Step 2: Restart the Bluetooth connection on your mobile device

This process will reset the Bluetooth connection on your mobile device, which will revert your device to a state where it can pair with the Square Reader again.

To reset the Bluetooth state on your Square Reader and mobile device:

  1. Open the Settings app on your mobile device.

  2. Toggle Bluetooth OFF and then back ON.

  3. Follow additional instructions for iOS or Android devices:

iOS device

  1. Make sure Bluetooth permissions for the Square POS app is enabled:
    • Open the Settings app on your iOS device.
    • Tap Privacy & Security > Bluetooth.
    • Toggle Bluetooth ON for the Square POS app(s) you are connecting your Square Reader to.
  2. Delete the Bluetooth connection from your iOS device:
    • Open the Settings app on your iOS device.
    • Tap Bluetooth and locate your Square Reader under My Devices.
    • Tap (i) next to any Square Readers > Disconnect or Forget This Device.
  3. Restart your mobile device by turning it off and then back on.

Learn how to Resolve Wi-Fi and Bluetooth issues caused by wireless interference from Apple’s support page.

Android device

  1. Delete the Bluetooth connection from your Android device:
    • Open the Settings app on your Android device.
    • Tap Connected devices > Connection preferences > Bluetooth.
    • Tap any Square Readers > Forget or Unpair.
  2. Clear Bluetooth storage cache from your Android device:
    • Open the Settings app on your Android device.
    • Tap Apps > Sort icon (down arrow with 3 vertical bars) > Show system apps.
    • Tap OK and all the system apps will appear in the list.
    • Go to the Settings on your Android device and select Apps.
    • Tap to display your system apps.
    • Select Bluetooth from the list of apps, then select Storage.
    • Tap Clear Cache and exit your Settings.
  3. Restart your mobile device by turning it off and then back on.

Step 3: Reset your Square Reader for contactless and chip

This process will reset your Square Reader so it can repair from a known-good state. Resetting your Square Reader will have no effect on payments, transaction history, or other information stored in your Square account. 

  1. Charge your Square Reader for at least 20 minutes.

  2. Use your finger or a small object like a hair pin, pen cap, or paper clip to firmly press and hold the button on your Square Reader for 20 seconds.

  3. After 20 seconds, release the button. Do not let go of the power button until after the red lights have stopped flashing.

  4. If USB is unplugged, press the button again to turn your Square Reader on and observe any lights on Square Reader.

If Square Reader lights turn on, you’re all set.

Step 4: Re-pair your Square Reader for contactless and chip

  1. Open the Settings app on your mobile device and toggle Bluetooth ON.

  2. Press and release the button on your Square Reader to turn it on.

  3. Open your Square POS app and tap ≡ More > Settings > Hardware > Square Readers.

    • If you see your Square Reader listed, tap on the listed device and tap Forget This Reader.

  4. Tap Connect a Reader.

  5. Press and hold the button on the reader for at least 3 seconds. Release the button as soon as you see orange flashing lights. If you see red flashing lights, you’ve held the button too long and you’ll need to try this step again.

  6. Tap Pair on the prompt to confirm the Bluetooth pairing request. On Android devices, quickly tap Pair and Pair & connect within 5 seconds each time you are prompted until the connection is successful.

  7. When the connection is successful, you will see the reader listed as Ready in the Square POS app.

Step 5: Factory reset your Square Reader for contactless and chip

Performing a factory reset will bring your Square Reader back to its original out-of-box state and will require you to pair the reader to your mobile device. A factory reset takes 10-15 minutes to complete and should only be performed after all other troubleshooting steps have been attempted.

Factory reset is only available on Square Reader (2nd generation) and Square Reader (1st generation, v3).
  1. Forget the reader from your device again by following the above Step 2: Restart the Bluetooth connection on your mobile device

  2. Forget the reader from your Square POS app by tapping ≡ More > Settings > Hardware > Square Readers > Forget This Reader.

  3. Hold the reader button down for 20 seconds. Do not release the button until the red lights stop flashing.

  4. To start the reader, push and hold the button until green LED lights come on, then release the button.

  5. Once again, hold the reader button down for 20 seconds. Do not release the button until the red lights stop flashing. It's important to do this within 30 seconds of restarting the reader.

  6. Start the reader a second time; push and hold the button until green LED lights come on, then release the button.

  7. After the second reboot, the reader will have performed a factory reset. The reader’s LEDs will blink green once again (without pressing the reader button) to indicate that the reset was successful.

  8. Once the factory reset is complete, try to pair your reader.

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