diff -r ab9f22ab57b5 -r c6f04bfcec2c thermferm/mqtt.c
--- a/thermferm/mqtt.c	Tue Jul 31 16:42:11 2018 +0200
+++ b/thermferm/mqtt.c	Tue Jul 31 23:04:35 2018 +0200
@@ -760,7 +760,9 @@
 	    payload = xstrcat(payload, unit->event_msg);
 	    payload = xstrcat(payload, (char *)"\"");
 	}
-	payload = xstrcat(payload, (char *)"}}");
+	payload = xstrcat(payload, (char *)",\"fermenter_uuid\":\"");
+	payload = xstrcat(payload, unit->uuid);
+	payload = xstrcat(payload, (char *)"\"}}");
 
 	topic = xstrcat(topic_base((char *)"DLOG"), (char *)"/");
 	topic = xstrcat(topic, unit->alias);