Some customers may experience issues connecting to Bluetooth card readers such as the ingenico iCMP or Miura M10 as well as directly connected peripherals like the Magtek iDynamo card reader or ELO dock, following a major iOS release.
While this does occur in a small number of cases when moving to a new major release of the iOS operating system, there are a few steps we recommend to resolve the issue.
Identifying the issue
The exact symptom you'll experience is that your device will be visible within iOS settings or will pair successfully to the iPad while the talech Register is unable to detect the peripheral.
Resolving the issue
In the case of Bluetooth devices that aren't detected after pairing successfully, the first step is to try resetting the iPads network settings.
Open the iOS Settings application and navigate to: General > Reset > Reset Network Settings
Note: After resetting, you must re-join your wi-fi network. Before resetting, be sure to note the correct wi-fi name and ensure you have the current password to your network!
Official instructions for resetting the network stack on all iOS devices is available from Apple here: https://support.apple.com/en-us/HT204051
In some cases the above reset may not sufficiently resolve the issue. This is often the case with devices which connect directly to the iPad's charge/sync port (such as the iDynamo card reader). In this case, it is necessary to erase the iPad which will restore it to the default state.
Note: This will erase all applications, documents, and settings from your iPad including photos and music in your iTunes library on the device. If you have any important data on this iPad you must back it up first using iTunes.
To reset the iPad, open the iOS Settings application and navigate to: General > Reset > Erase All Content and Settings
Official instructions for erasing iOS devices is available from Apple here: https://support.apple.com/en-us/HT201274