More garbage collection

gauge.py

@@ -917,7 +917,20 @@ _last_mqtt_check = 0
 _discovery_queue = []
 _discovery_idx = 0
 _last_discovery_ms = 0
-_DISCOVERY_INTERVAL_MS = 200
+_DISCOVERY_INTERVAL_MS = 350
+
+
+def _compact_discovery_payload(payload):
+    """Trim optional HA discovery fields when RAM is tight."""
+    compact = dict(payload)
+
+    # Light entities are the largest payloads because they repeat effect metadata.
+    # Keep core functionality, but omit optional effect declarations to reduce heap use.
+    if compact.get("schema") == "json":
+        compact.pop("effect", None)
+        compact.pop("effect_list", None)
+
+    return compact
 
 
 def check_mqtt():
@@ -968,7 +981,8 @@ def check_mqtt():
 
 
 def _publish_discovery_entity(client, topic, payload, log_msg):
-    client.publish(topic, ujson.dumps(payload), retain=True)
+    gc.collect()
+    client.publish(topic, ujson.dumps(_compact_discovery_payload(payload)), retain=True)
     info(log_msg)
 
 
@@ -1241,6 +1255,7 @@ def service_discovery():
     if _last_discovery_ms and utime.ticks_diff(now, _last_discovery_ms) < _DISCOVERY_INTERVAL_MS:
         return
 
+    gc.collect()
     topic, payload, log_msg = _discovery_queue[_discovery_idx]
     try:
         if isinstance(payload, bytes):
@@ -1251,8 +1266,7 @@ def service_discovery():
         log_err(f"Discovery publish failed for {topic}: {e}")
     _discovery_idx += 1
     _last_discovery_ms = utime.ticks_ms()
-    if (_discovery_idx & 3) == 0:
+    gc.collect()
-        gc.collect()
 
 
 def publish_online(client):