First off, I love this little device! It works so well and I love the insights I’m able to get. I have mine incorporated into Home Assistant and it’s wonderful!
I have been trying to figure out a way to use it to detect a power outage. I have a battery pack acting as a UPS and it works great. I set up Home Assistant to send an alert when my mains drop to zero. Well, I had a power outage recently and I never got alerted. I noticed looking at the history in Home Assistant that the power never dropped. I thought maybe I’d need to output the reference voltage and I could monitor that. I tested that too and still didn’t work. If I look at the voltage value in Home Assistant and pull the plug out, it never drops. It appears like the IotaWatt just stops updating.
Is this intended behavior? Is there some other way I can accomplish this?