I tried to connect to a esp32 room 32 using sockets. but when trying to connect to the micro-prozessor which works as the server the client (coded in swift) says: 2021-03-20 15:34:55.157403+0100 connectionPlayground[2083:81450] [connection] nw_read_request_report [C1] Receive failed with error "Socket is not connected" 2021-03-20 15:34:55.157543+0100 connectionPlayground[2083:81450] [connection] nw_socket_get_input_frames [C1:2] recvmsg(fd 11, 1024 bytes) [54: Connection reset by peer] 2021-03-20 15:34:55.158086+0100 connectionPlayground[2083:81450] Connection 1: received failure notification 2021-03-20 15:34:55.158410+0100 connectionPlayground[2083:81450] [connection] nw_connection_copy_connected_local_endpoint [C1] Connection has no connected path 2021-03-20 15:34:55.158456+0100 connectionPlayground[2083:81450] [connection] nw_connection_copy_connected_remote_endpoint [C1] Connection has no connected path failure:Error Domain=NSPOSIXErrorDomain Code=57 "Socket is not connected" UserInfo={NSErrorFailingURLStringKey=http://172.20.10.2/, NSErrorFailingURLKey=http://172.20.10.2/} I also changed the info.plist file and added this: ?xml version="1.0" encoding="UTF-8"? !DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd" plist version="1.0" dict keyNSAllowsLocalNetworking/key true/ keyNSAllowsArbitraryLoads/key true/ keyNSExceptionDomains/key dict key172.20.10.2/key dict keyNSTemporaryExceptionMinimumTLSVersion/key stringTLSv1.1/string keyNSIncludesSubdomains/key true/ keyNSTemporaryExceptionAllowsInsecureHTTPLoads/key true/ /dict /dict /dict /plist my current program looks like this:  @IBAction func start(_ sender: Any) {                          print("start");         let session = URLSession(configuration: .default, delegate: self, delegateQueue: OperationQueue())         let url = URL(string: "ws://172.20.10.2/")!         let webSocketTask = session.webSocketTask(with: url)         webSocketTask.receive { (result) in             print("result")             switch result{             case .success(let message):                 switch message {                 case .string(let text):                     print(text)                 default:                     break                 }             case .failure(let error):                 print("failure:\(error)")                 break             default:                break             }         }         webSocketTask.resume()     }