diff --git a/README.md b/README.md
index e861915..15b47e2 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,8 @@ mosquitto_sub -h localhost -t '#' -p 1883
 mosquitto_pub -h localhost -p 1883 -t '/' -m $(date --utc +%s)
 ```
 
+There is also a *very* usefuly tool to debug MQTT: [MQTT Explorer](https://github.com/thomasnordquist/MQTT-Explorer/), that is also available at [mqtt-explorer.com](https://mqtt-explorer.com/).
+
 ### Node-RED
 
 NodeRed is running here: http://localhost:1880/
diff --git a/software/dashboard/grafana/grafana.db b/software/dashboard/grafana/grafana.db
index 7530c5e..0be1543 100644
Binary files a/software/dashboard/grafana/grafana.db and b/software/dashboard/grafana/grafana.db differ