Fix dashboard: connect instruments on startup, remove broken reset, apply controls properly

src/py_dvt_ate/app/dashboard/app.py

@@ -131,6 +131,15 @@ def init_session_state() -> None:
         )
         st.session_state.instruments = InstrumentFactory.create(config)
 
+        # Connect instruments for dashboard use
+        try:
+            st.session_state.instruments.chamber.transport.connect()
+            st.session_state.instruments.psu.transport.connect()
+            st.session_state.instruments.dmm.transport.connect()
+        except Exception as e:
+            st.error(f"Failed to connect to instruments: {e}")
+            st.stop()
+
     if "repository" not in st.session_state:
         # Create test repository (temporary file for dashboard demo)
         import os
@@ -195,31 +204,6 @@ def step_simulation() -> None:
         pass
 
 
-def sync_instruments_from_session_state() -> None:
-    """Sync instrument settings from session state via HAL (called by fragment)."""
-    instruments: InstrumentSet = st.session_state.instruments
-
-    try:
-        # Control thermal chamber via HAL
-        instruments.chamber.set_temperature(st.session_state.get("temp_setpoint", 25.0))
-
-        # Control power supply via HAL
-        input_voltage = st.session_state.get("input_voltage", 5.0)
-        output_enabled = st.session_state.get("output_enabled", False)
-        instruments.psu.set_voltage(1, input_voltage)
-        instruments.psu.enable_output(1, output_enabled)
-
-        # Note: Load current would typically be controlled by an electronic load
-        # instrument. For simulation, we set it directly on the physics engine.
-        # In production, you'd have a separate IElectronicLoad interface.
-        server: SimulationServer = st.session_state.server
-        engine: PhysicsEngine | None = server.physics_engine
-        if engine is not None:
-            load_current_a = st.session_state.get("load_current", 100.0) / 1000.0
-            engine.set_load_current(load_current_a)
-    except OSError:
-        # Ignore communication errors
-        pass
 
 
 def display_controls() -> None:
@@ -241,31 +225,11 @@ def display_controls() -> None:
             st.session_state.running = True
             st.session_state.last_update = time.time()
 
-    # Reset button
-    if st.sidebar.button("Reset", width="stretch"):
-        # Stop server and restart
-        server: SimulationServer = st.session_state.server
-        loop = asyncio.new_event_loop()
-        loop.run_until_complete(server.stop())
-        loop.close()
-
-        # Restart server
-        st.session_state.server, st.session_state.server_thread = start_embedded_server()
-
-        # Reconnect instruments
-        config = InstrumentConfig(
-            backend="simulator",
-            simulator_host="127.0.0.1",
-            chamber_port=5001,
-            psu_port=5002,
-            dmm_port=5003,
-        )
-        st.session_state.instruments = InstrumentFactory.create(config)
-
-        # Reset history
+    # Clear Charts button (just clears history, doesn't restart server)
+    if st.sidebar.button("Clear Charts", width="stretch"):
         st.session_state.history = SimulationHistory()
-        st.session_state.running = False
         st.session_state.last_update = time.time()
+        st.rerun()
 
     st.sidebar.divider()
 
@@ -352,8 +316,19 @@ def simulation_display() -> None:
     instruments: InstrumentSet = st.session_state.instruments
     history: SimulationHistory = st.session_state.history
 
-    # Sync instrument settings from UI controls via HAL
-    sync_instruments_from_session_state()
+    # Apply control settings to instruments
+    try:
+        temp_setpoint = st.session_state.get("temp_setpoint", 25.0)
+        input_voltage = st.session_state.get("input_voltage", 5.0)
+        output_enabled = st.session_state.get("output_enabled", False)
+        load_current_ma = st.session_state.get("load_current", 100.0)
+
+        instruments.chamber.set_temperature(temp_setpoint)
+        instruments.psu.set_voltage(1, input_voltage)
+        instruments.psu.enable_output(1, output_enabled)
+        engine.set_load_current(load_current_ma / 1000.0)
+    except Exception:
+        pass  # Ignore errors
 
     # Step simulation if running
     if st.session_state.running: