add test

run_test.py

@@ -0,0 +1,48 @@
+import csv
+import time
+from hil_lib import HILController
+
+# --- SET YOUR PORTS HERE ---
+EMULATOR_PORT = 'COM4'  # The Bridge
+TARGET_PORT = 'COM5'    # The App
+FILENAME = 'hil_test_results.csv'
+
+hil = HILController(EMULATOR_PORT, TARGET_PORT)
+
+print(f"Starting HIL Test... Saving to {FILENAME}")
+
+with open(FILENAME, mode='w', newline='') as file:
+    writer = csv.writer(file)
+    writer.writerow(["Simulated_CO2", "Target_Read_Output", "Timestamp"])
+
+    try:
+        # Test values to cycle through
+        test_values = [400.0, 600.5, 850.0, 1200.0, 2500.0]
+        
+        for val in test_values:
+            print(f"\nTesting CO2: {val} ppm")
+            
+            # 1. Put data on the bus (Wait for emulator to request it)
+            start_time = time.time()
+            success = False
+            while time.time() - start_tick < 5: # 5 second timeout per sample
+                if hil.set_emulator_data(co2=val, temp=25.0, hum=50.0):
+                    success = True
+                    break
+            
+            # 2. Read what the Target ESP32 saw on its Serial Monitor
+            time.sleep(1) # Give the Target a moment to process and print
+            target_data = hil.read_target_output()
+            
+            if target_data:
+                print(f"Target Received: {target_data}")
+                # 3. Store in CSV
+                writer.writerow([val, target_data, time.ctime()])
+                file.flush() # Ensure data is written to disk
+            else:
+                print("Warning: Target did not report data in time.")
+
+    except KeyboardInterrupt:
+        print("Test stopped by user.")
+    finally:
+        hil.close()