How do I enable Bluetooth on my iOS 11?

Open your Arboleaf app.

(1) From the bottom of your screen, swipe up to access your control panel.

iphone: swipe up to access control panel

Or, on iPhone X swipe down from the upper right corner.

iphone X: swipe down to access control panel

(2) On control panel tap on your Bluetooth icon to enable it.

to enable Bluetooth