Machine on/off based on last timestamp receivced

welcome to the :grafana: forum, @pablosproject

I would check out this thread. The stat panel and the Status History panels are probably what you want to use here:

https://play.grafana.org/d/Zb3f4veGk/2-stats?orgId=1

https://play.grafana.org/d/qD-rVv6Mz/6-state-timeline-and-status-history?orgId=1