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In electricity, a battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy.

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How to implement properly the iot garbage management using sensors and esp8266 to mobile app...

There are many solutions to this project. Also, while the DHT11 sensor is well defined, simply saying "Ultrasonic sensor" is not. So only the DHT11 and Raspberry Pi will be included in this answer. …
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