I have been able to setup a feed of temp and humidity sensors from HE to an install of influxdb and grafana on my raspberry pi4 (see this topic for more details). I now have the output of this setup, i.e. a grafana dashboard, displayed on one of my HE dashboards, shown on a tablet mounted on the side of my fridge. Very happy 
. Obviously I need to resize the charts slightly and will no doubt develop these further over time.
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