How to auto reconnect already authenticated Mi Band?

[sulabh9999]

Thanks for saving your days...

This code works well to auth Mi Band 3, but in case if any device goes out of ble range, or ble restart it should auto reconnect with existing connection(shouldn't force to re-authenticate), everytime need to re-auth to pair devices. gadgetbridge is great example. Please share if any idea on this.

Thanks a lot...