Verifone P400

The Verifone P400 is a countertop reader for Stripe Terminal apps. It connects to the Stripe Terminal SDK over the internet.

This reader is compatible with JavaScript, iOS, Android, and React Native SDKs. To view the reader’s parts and features, see the product sheet.

Troubleshoot the reader

Make sure your network meets all of our network requirements, and try the steps in the network troubleshooting section.

To begin troubleshooting, use the following common scenarios to help diagnose what’s broken.

Reader is unable to connect

Stripe provides two debug screens on the reader. Use these screens to help diagnose common connectivity and network issues. To access a debug screen, enter the following key sequences while on the splash screen:

To exit a debug screen, press 0 on the keypad. You can also program your app to re-render the screen by calling any of these functions:

• connectReader()
• collectPayment()
• setReaderDisplay()

Reader is unable to update

If your reader isn’t updating, it’s possible that it can’t connect to Stripe. Make sure the network it’s connected to meets our network requirements.

Reader doesn’t have IP address

The Device Status debug screen shows the reader’s IP address, or No ETH if the device doesn’t have an IP address. Use the following steps to debug a No ETH condition.

Other IP-address

If the above steps don’t reveal an IP address on the reader, try these additional steps:

• Unplug and reconnect the Ethernet connection to the network source (that is, the modem for router networking, or your computer for bridged networking).
• Restart the reader with the network source attached to it. You can restart the reader by unplugging and reconnecting the power cable from the connector cable.
• Check the connectors for any broken hardware (such as bent pins).

Reader has IP address, but is unable to communicate with Stripe

The Connectivity debug screen indicates the connection status between the P400 and Stripe. Refer to our network requirements for details and further troubleshooting steps.

Stripe reader software

Stripe maintains the software that controls the Verifone P400. The reader receives updates automatically from Stripe when not in use. Read about reader software updates for details. These can include improvements and required security updates from Stripe and our hardware partners. As reader software updates are made available, update your readers to the latest available version to continue using Stripe Terminal. Failing to install a required update can prevent a reader from accepting payments.

The reader restarts every day at midnight for PCI compliance, and disconnects from the POS app every morning. Leave your reader connected to power to receive automatic software updates. This ensures that updates happen at midnight (in the timezone of the assigned location) to avoid interruption to sales. If you unplug the reader at night, an update could start when you turn it back on. To manually check for an update, reboot the reader.

You can always check the current reader version by pressing 0-4-2-6-8.

Verifone P400 software releases

For additional instruction on maintaining PCI compliance when installing updates to your Verifone P400 device, refer to the reader PCI implementation guide.