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Thanks. Is there a simple cost effective means of doing this? In the particular case of where Id like to use it, there is a 12v gate motor battery which probably is too much. In trying to standardize my build, is there a cost effective means to use either mains and/or battery. However keeping it relative small as I'd like to use this on lights, plugs etc Thanks for your help.
As mentioned, I'm pretty new to this, so when you advise me, it means google :-). I'm attempting to open and close an electric gate using the esp8266. There is 230v mains power as well as a 12v batter backup.Having said the above, I would like to potentially use the completed project on light and power switches. But if I have to make different ones, then so be it. I guess I'm learning, its just taking so much time to get such little done :-)
Please excuse me as Im new to electronics. Can the power that is being switched on/off be used to power the esp8266? If yes, when the power has been switched off, does the esp still have power?