CME U4MIDI WC User Manual page 19

Your iOS or Android device needs to support the Bluetooth Low
Energy 4.0 feature (or higher).
2. Open the WIDI app and the WIDI Core name will appear in the device
list. Click the name of the device to enter the firmware upgrade page.
Then tap [Start] and [Upgrade], and the app will perform a firmware
update (during the upgrade process, please keep your screen on until
the update is completed).
3. After the upgrade is complete, exit the WIDI App and restart U4MIDI
WC.
BLE MIDI CONNECTION
(O PTIONAL WIDI CO RE EXPANSION MODULE INSTALLED)
Note: All WIDI products use the same Bluetooth connection method.
Therefore, the following video descriptions use WIDI Master as an example.
⚫ Establish a Bluetooth MIDI connection between two U4MIDI WC
interfaces with WIDI Core installed
Video instruction: https://youtu.be/BhIx2vabt7c
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