Distance Measurement using HC-SR04 via NodeMCU

Hey Maker's,I'm back with a new instructable.In this Instructable we will learn about HC-SR04 widely known as Ultrasonic Sensor, how it works and how to interface with the NodeMCU. And also how to measure the distance using HC-SR04.Before building the circuit let me explain what is a HC-SR04 sensor?...
By: TheCircuit

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