In Varduino Manager, go to "Instrument settings". In the bluetooth section:
Choose iOS as target device
Choose LK8EX1 as data format
Turn on your variometer and plug it in. Click "send to device". Reboot your device.
Flyskyhy configuration on iPhone
In FlySkyHy, go to settings -> Vario and choose the model as shown in the picture. Select the device that appears in the list. Your variometer must be on.
Back to the app main page, the bluetooth icon now appears in green.