Since the new update (Homey 2.0.0-rc.2 / App 0.17.0.231). Prometheus doesn’t work anymore. I’ve reported @github Keep you all informed.
When Prometheus can’t receive data, Grafana is also death 
Prometheus
Grafana
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The issue is tracked here: https://github.com/rickardp/homey-prometheus-exporter/issues/8
Correct it’s my issue 
