Hi, you should try this [https://github.com/swisspol/GCDWebServer) when you run GCDWebServer on your MacBook , you can access web page from your phone app , i'v just tested using swift ( URLRequest + URLSession ) var req = URLRequest(url: URL(string: "http://your_macos_ip_address:8080/")!) if let error = error { print("Failed: \(error)") return } guard let data = data else { print("data is nil") return } print(" \(data.count) bytes and is: \n") let responseText = String(data: data, encoding: .utf8) ?? "*unknow encoding*" print("The response is: \(responseText)") } task.resume()

static void advertising_init(void){ ... ble_advdata_manuf_data_t manuf_data; uint8_t awesomeData [8] = {0}; // your customize data here manuf_data.company_identifier = 0xaeac; // customize here manuf_data.data.p_data = awesomeData; manuf_data.data.size = sizeof(awesomeData); init.advdata.p_manuf_specific_data = &manuf_data; now when you power on your peripheral device , you can scan the advertisement data and found your customized bytes

the advertisement package of a peripheral device can included some customer data (several bytes) that iPhone / iPads can discover and parse without connecting to it. such as the firmware of ble chip nrf52840 , one customised the manufacturer info in the advertising data :

It seems that zstack still has some issues when recalculating multiple layers with lots of views inside it. I consider that overly a floating view on zstack, this view was not calculated by zstack, I copied the code of floating view from here, and the following is the code modified from your version: import SwiftUI struct TMainWnd: View { @State var strings: [String] = ["A", "B", "C", "D", "E"] @State var ints: [Int] = Array(1...300) @State var selectedInt: Int? @State var isShow = false var body: some View { ZStack { ScrollView { VStack { ForEach(strings, id: \.self) { string in VStack { HStack { Text(string) Spacer() } LazyVGrid(columns: [GridItem(.flexible()), GridItem(.flexible()), GridItem(.flexible())]) { ForEach(ints, id: \.self) { int in VStack { Text(String(int)) Spacer() } .frame( maxWidth: .infinity ) .frame(height: 200) .background( RoundedRectangle(cornerRadius: 5) .fill(int % 2 == 0 ? .orange : .green) ) .onTapGesture { self.selectedInt = int } } } } } } .padding() } }.floatingView(above: TFloatingWnd(selectedInt: $selectedInt)) } } struct TFloatingWnd : View { @Binding var selectedInt : Int? var body: some View { VStack { Spacer() if let selectedInt { Text( String(selectedInt ) ) } Spacer() if let selectedInt { Button { self.selectedInt = nil } label: { Image(systemName: "x.circle") .resizable() .scaledToFit() .frame(width: 30) } } }.frame( maxWidth: .infinity, maxHeight: .infinity) } } extension View { func floatingView<Content: View>(above: Content) -> ModifiedContent<Self, Above<Content>> { self.modifier(Above(aboveContent: above)) } } struct Above<AboveContent: View>: ViewModifier { let aboveContent: AboveContent func body(content: Content) -> some View { content.overlay( GeometryReader { proxy in Rectangle().fill(Color.clear).overlay( self.aboveContent, alignment: .center ) }, alignment: .center ) } }