IOT BASED FIRE ALARM SYSTEM|Node Mcu|IOT
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The resistance of the sensor is different depending on the type of the gas.
The smoke sensor has a built-in potentiometer that allows you to adjust the sensor digital output (D0) threshold. This threshold sets the value above which the digital pin will output a HIGH signal
From my previous tutorial I made Arduino based Smoke detection system. Here, I have made IOT based Smoke detection notification system through your smart phone using Node Mcu and Blynk app
click here for full detail: https://www.blackkeyhole.com/2020/03/...
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