Factors causing the error
Reason 1.0 - The Lightspeed K-Series application is sent to the background
The application can be sent to the background by either minimising the Lightspeed K-Series application i.e. to change songs on Spotify, checking your email, browsing social media, or when exiting the app.
Solution 1.1 - Make sure the main polling till is always on
Solution 1.2 - Auto-Lock Setting
Update the Auto-Lock Setting to keep the iPad from going to sleep. Go to your iPad Settings Display & Brightness Auto Lock, and set it to “Never”.
Solution 1.3 - Guided Access / MDM
You can deploy Guided Access or an MDM solution (mobile device management) software to lock down the iPads from using other applications.
Solution 1.4 - Extension
Create an extension in the Lightspeed K-Series back office that will enable you to seamlessly utilise a URL within the app without causing it to go offline. Once the web extension is configured, you can create a menu button for it to be used on the POS.
Reason 2.0 - Increase the POS Cancelation Timeout
Solution 2.1 - Increase the POS Cancellation Timeout
Increase the timeout to 5 minutes in Manage for Lightspeed K-Series orders, to give the device time to re-connect.
Reason 3.0 - Improve Internet Connection
We advise working closely with your IT team to improve network connectivity.
Solution 3.1 - Connection Status on POS
Check the internet connection status on your POS.
Solution 3.2 - Single Wi-Fi Connection
Ensure that the device is connected to only one Wi-Fi network at a time, and that all other networks are forgotten or removed.
Solution 3.3 - Router Location
Place your router in a central location for best signal coverage across your entire building.
Solution 3.4 - Ethernet Adapter
Use an iPad Ethernet adapter for a more fast, secure and reliable wired internet connection.
Solution 3.5 - Lightspeed Networking Guide
Solution 3.6 - Change Network Provider
Automated SMS Notifications
You can configure automated SMS notifications to be sent whenever the “Not processed before validity ended” error is received.
NOTE: To set it up, navigate to Manage -> Orders -> SMS Notifications -> Select the country code, input your phone number and make sure to save the changes at the bottom of the page.
Here is an example of the SMS notification message
If you're still experiencing issues, please email support@meandu.com and include any solutions you may have already tried.