Discovery didn't set online status

gauge.py

@@ -642,6 +642,7 @@ def check_mqtt():
             info("MQTT reconnected!")
             publish_discovery(client_ref)
             _subscribe_all(client_ref)
+            publish_online(client_ref)
             publish_state(client_ref)
             publish_backlight_states(client_ref)
             return True
@@ -789,6 +790,11 @@ def publish_discovery(client):
             utime.sleep_ms(10)
 
 
+def publish_online(client):
+    for i in range(num_gauges):
+        client.publish(gauge_topics[i]["status"], b"online", retain=True)
+
+
 def publish_state(client):
     for i in range(num_gauges):
         gt = gauge_topics[i]
@@ -825,6 +831,7 @@ def main():
     info("Home command sent")
 
     info("Publishing state...")
+    publish_online(client_ref)
     publish_state(client_ref)
     utime.sleep_ms(50)
     for _ in range(5):