BLEPeerStudent https://www.hackingwithswift.com/example-code/uikit/how-to-take-a-photo-using-the-camera-and-uiimagepickercontroller https://www.hackingwithswift.com/example-code/media/how-to-record-audio-using-avaudiorecorder https://medium.com/swift-india/use-of-codable-with-jsonencoder-and-jsondecoder-in-swift-4-71c3637a6c65 https://stackoverflow.com/questions/28487146/how-to-add-live-camera-preview-to-uiview