Graphs for Buttons



I’m using Cayenne to control a 4 Channel Relay in combination with a Temp Sensor.
If the Temp. reaches a certain Limit, a Relay is triggered (Air Ventilation)
When the Temp. lowers to a certain point, the Relay is turned Off…

The Relay is also displayed in the Dashboard using a Button widget,

It would be really nice if i could see how long the Relay/Button was turned on over Time.
For exsample in a Graph (like the Temp sensor)