Discovery missing effects

gauge.py

@@ -883,10 +883,13 @@ def _subscribe_all(c):
 def connect_mqtt():
     global client_ref, _mqtt_connected
     from umqtt.robust import MQTTClient
+    gc.collect()
+    info(f"Heap before MQTT: {gc.mem_free()} bytes")
     info(f"Connecting to MQTT broker {MQTT_BROKER}:{MQTT_PORT} ...")
     last_error = None
     for attempt in range(3):
         gc.collect()
+        info(f"  attempt {attempt + 1}: heap {gc.mem_free()} bytes")
         try:
             if client_ref is not None:
                 try:
@@ -906,7 +909,8 @@ def connect_mqtt():
             client.connect()
             client_ref = client
             _mqtt_connected = True
-            info(f"MQTT connected  client_id={MQTT_CLIENT_ID}")
+            gc.collect()
+            info(f"MQTT connected  client_id={MQTT_CLIENT_ID}  heap {gc.mem_free()} bytes")
             return
         except Exception as e:
             last_error = e