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Iot unit for sensing brightness and send data to the cloud.
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The circuit uses an ESP8266 wireless module and a IR-transistor to measure the light level. The value is then sent to a account on The ESP-module is an ESP-01 and is programmed via the Arduino IDE, the code is in LightMeter.ino. There's also a script called This script fetches the light value from which then is used to decide if it's dark in the room. It will then send a code via codesend and 433Utils on a Raspberry Pi to switch on or off a lamp.

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