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In this video I show how to build devices which do not use any energy during "deep sleep" and so can be used for a long time. The only prerequisite: A mechanical activation through a button or a magnet.
Links:
ESP8285: www.itead.cc/w...
Reed Relay: www.aliexpress...
If you want to support the channel and buy from Banggood: bit.ly/2jAQEf4 (no additional charges for you)
/ andreas-spiess-7331894...
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