The Verifone P400 is a countertop reader for web-based Stripe Terminal apps. It connects to the Stripe Terminal SDK over the internet.
Turning the reader on and off
To turn on the Verifone P400, securely plug its proprietary I/O cable into the port on the bottom of the reader. The cover slides over the port to hold the cable in place. Plug the power adapter into the I/O block and into a power outlet.
Verifone P400 I/O block
The Verifone P400 automatically turns on when connected to power. In a countertop deployment, leaving the device on for extended periods is expected. If you need to turn the reader off, remove the power source.
Connecting the reader to the internet
Because the Verifone P400 is internet enabled, its reader software communicates directly with Stripe, managing connectivity through a LAN.
To connect to the internet, connect an Ethernet cable from your router to the Verifone P400, using the ETH port (not the RS232 port).
The reader obtains an IP address using DHCP. As soon as the network cable is plugged in, the reader attempts to establish communication with Stripe.
The reader has a few screens to indicate its connectivity state. The default splash screen indicates that the reader is connected to Stripe and ready for processing.
To begin troubleshooting, use the following common scenarios to help diagnose what’s broken.
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:
|Key Sequence||Debug Screen||Description|
|0-4-2-6-8||Device Status||Shows the device’s IP address, account ID, location, gateway, network mask, and connectivity status.|
|0-8-6-2-4||Connectivity||Starts a network test, by attempting to connect to the required endpoints.|
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:
If you reader is not updating, it’s possible that it cannot connect to Stripe. Check its connectivity.
Reader does not have an IP address
The Device Status debug screen shows the reader’s IP address, or No ETH if the device does not have an IP address. Use the following steps to debug a No ETH condition.
If using a router, please refer to your router’s manual, and reconfigure the networking setup.
If the above steps do not reveal an IP address on the reader, try these further measures:
- Unplug and re-connect the Ethernet connection to the network source (i.e., the modem for router networking, or your computer for bridged networking).
- Restart the reader while the network source is attached to it. You can restart the reader by unplugging and re-connecting the power cable from the I/O block.
- 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 whether the P400 is connected to Stripe. Here are some common reasons for failing this test, with corresponding troubleshooting steps.
- Stripe endpoints cannot be accessed:
- Check your computer’s firewall/blacklists.
- The network source is not connected to the internet:
- In the case of bridged connections, ensure that the selected source is connected to the internet.
- In the case of router connections, refer to your router’s documentation to restart the network.
The Stripe reader software
Stripe maintains the software that controls the Verifone P400. The reader receives automatically from Stripe when not in use. Read about reader software updates for details.
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
||Added new reader screens for better UX, disabled contactless sources during
||Improved UX for reader software updates.|
||Localization bug fixes, onboarding polish.|
||Additional connectivity screens have been added to assist in the setup and deployment of your devices.|
||The initial relase of the Stripe reader software for the Verifone P400. Your Verifone P400 device is ready to accept a tap, dip, or swipe of a card to accept in person payments with your Stripe account.|
For additional instruction on maintaining PCI compliance when installing updates to your Verifone P400 device, refer to the reader PCI implementation guide.
Now that you have your reader set up, you might want to read about connecting it to your app, or try collecting your first Terminal payments with a physical reader.
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