Show TCP connected status.

Co-authored-by: Copilot <copilot@github.com>

src/app.rs

@@ -686,7 +686,10 @@ impl App {
 
         // app.bode_plot.lock().unwrap().update_magnitudes(MeasurementPointSet::Eighteen, magnitudes);
         // app.bode_plot.lock().unwrap().update_phases(MeasurementPointSet::Eighteen, phases);
-
+        
+        // Wait for the hardware state to update, before starting the measurement, to ensure the UI reflects the correct state
+        std::thread::sleep(std::time::Duration::from_millis(10));
+        // Start measurement by default on the active tab
         app.toggle_start_stop();
         app
     }
@@ -863,6 +866,25 @@ impl eframe::App for App {
                     });
                 });
             });
+            
+            // Show connection status in the bottom panel, green if connected
+            if self.app_state_rx.borrow().tcp_connected {
+                let frame = egui::Frame::default().fill(Color32::DARK_GREEN);
+
+                egui::TopBottomPanel::bottom("bottom_panel")
+                    .frame(frame)
+                    .show(ctx, |ui| {
+                        ui.with_layout(
+                            egui::Layout::centered_and_justified(egui::Direction::LeftToRight),
+                            |ui| {
+                                ui.label(
+                                    RichText::new("TCP interface active")
+                                        .color(Color32::WHITE),
+                                );
+                            },
+                        );
+                    });
+            }
         });
 
         egui::CentralPanel::default().show(ctx, |ui| {

src/bin/main_gui.rs

@@ -85,7 +85,7 @@ async fn main() {
     let mut native_options = NativeOptions::default();
     native_options.viewport.inner_size = Some(Vec2::new(850.0, 600.0));
     let _ = eframe::run_native(
-        "Impedance Visualizer [egui + tokio] - Hubald Verzijl - 2025",
+        "Bio-Z Visualizer [egui + tokio] - Hubald Verzijl - 2026",
         native_options,
         Box::new(|_cc| Ok(Box::new(app))),
     );

src/control.rs

@@ -88,7 +88,10 @@ pub async fn app_control_loop(mut app_control_rx: mpsc::Receiver<ControlCommand>
                 info!("Stopping impedance hardware...");
                 if let Err(e) = hardware_control_tx.try_send(StartStopSignal::Stop) {
                     info!("Failed to send stop command: {:?}", e);
+                }
             }
+            ControlCommand::TcpConnected(connected) => {
+                state.tcp_connected = connected;
             }
         }
 

src/state.rs

@@ -46,6 +46,7 @@ pub enum ControlCommand {
     ChangeActiveTab(TabActive),
     Start(Mode),
     Stop,
+    TcpConnected(bool),
 }
 
 #[derive(Clone, Copy, Debug)]
@@ -107,6 +108,7 @@ pub struct AppState {
     pub electrode_settings: ElectrodeSettings,
     pub sweep_points: SweepPoints,
     pub tab_active: TabActive,
+    pub tcp_connected: bool,
 }
 
 impl Default for AppState {
@@ -119,6 +121,7 @@ impl Default for AppState {
             electrode_settings: ElectrodeSettings::new(),
             sweep_points: SweepPoints::Eighteen,
             tab_active: TabActive::Single,
+            tcp_connected: false,
         }
     }
 }

src/tcp.rs

@@ -10,6 +10,7 @@ pub async fn tcp_command_server(app_control_tx: Sender<ControlCommand>) {
 
     loop {
         let (socket, addr) = listener.accept().await.unwrap();
+        app_control_tx.try_send(ControlCommand::TcpConnected(true)).unwrap();
         println!("Client connected: {:?}", addr);
 
         let tx = app_control_tx.clone();
@@ -42,6 +43,7 @@ pub async fn tcp_command_server(app_control_tx: Sender<ControlCommand>) {
             }
 
             println!("Client disconnected: {:?}", addr);
+            tx.try_send(ControlCommand::TcpConnected(false)).unwrap();
         });
     }
 }