No it's not a joke, just a small PCB board fitting perfectly into a milk bottle cap
On the other side, another milk bottle cap, finishing a beautifuly designed case...
You can see two small electrods, sensitive to water.
Inside the box :
- an ESP8266, always sleeping
- a 6V Bat
Current drain almost 0A (nano Amps when iddle)
If you touch the electrods with wet finger, a firebase notification is sent and intercepted with IoTAlarm App
That's it
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