Fixed temphum sensor

orchestrateur/sensors/temp_hum.py

@@ -15,17 +15,28 @@ white = 1   # The White colored sensor.
 
 def get_temperature_and_humidity():
     with grove_lock:
+        try:
             [temp, humidity] = grovepi.dht(sensor, blue)
-        if math.isnan(temp) == False and math.isnan(humidity) == False:
+            if not math.isnan(temp) and not math.isnan(humidity) and temp > -40 and humidity >= 0:
                 return temp, humidity
-        else:
-            print("Error reading from DHT sensor")
+        except Exception:
+            pass
         return None, None
 
-def get_temperature_and_humidity_with_retry(max_retries=3):
-    for _ in range(max_retries):  # Try up to max_retries times
+
+def get_temperature_and_humidity_with_retry(max_retries=4, retry_delay=1.5):
+    """
+    Reads temperature and humidity with retries.
+    Uses a 1.5s delay between attempts to respect DHT sampling limits.
+    """
+    for attempt in range(max_retries):
         temp, humidity = get_temperature_and_humidity()
         if temp is not None and humidity is not None:
             return temp, humidity
-        time.sleep(1)  # Wait a bit before retrying
+        
+        # Wait before retrying (DHT sensors require >= 1s between reads)
+        if attempt < max_retries - 1:
+            time.sleep(retry_delay)
+            
+    print("Warning: All DHT sensor read attempts failed.")
     return None, None