1) Give a description of the problem
I’m in a doozy here - just cant work out how to do this, we have a chest freezer in my shed (along with great wifi) but occasionally we loose the electric, I have some TP link wifi plugs but just cant work out how to monitor then using webcore so that i get an alert if i get a comms error which would happen if the shed power goes down.
I would be oh so greatful if someone had any ideas!
Thanks in advance.
Stuart
This is more of a ST solution rather than a Webcore one…but you could use a battery operated contact sensor, automotive realy and a simple wall-wart DC power converter. If you have a contact sensor that allows for remote contact and a 12v DC wall-wart and simple automotive 12v relay, you can wire the contact sensor to the switched side of the relay. That way, when the power goes out, the relay would turn off and the contact sensor would open (or close, depending on how you have it set) and then you could pick up the change in that device in WebCore to announce it to you.
Now, as far as the contact sensor goes…you say your shed has good WiFi. What about zigbee or z-wave? If you’re looking for a wifi device, you can use the ST_Anything project to build a contact sensor. You would want to pick a board that has a lipo batter backup though, like the Adafruit Feather Huzzah. That way it will transmit that contact sensors status when it doesn’t have power. That board works well because it will automatically switch to battery and then automatically charge the battery when power is back on. If you need more help on that specifically, I can go into much greater detail if you need.