This guide shows how to use the HC-SR04 Ultrasonic Sensor with the ESP8266 NodeMCU board using the Arduino core. The ultrasonic sensor uses sonar to determine the distance to an object. We’ll show you how to wire the sensor to the ESP8266 and provide several example sketches to determine the distance to an object using the HC-SR04.

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?? As the name indicates, ultrasonic sensors measure distance by using ultrasonic waves ...

To start ranging with HC-SR04, first, we apply 10µs pulse to the trigger pin of the HC-SR04 sensor from the ESP8266 NodeMCU digital output pin. As soon as 10µs input trigger signal becomes active low, the transmitter circuit produces a burst of 8 ultrasonic sonar pulses.

Mar 13, 2025 · This comprehensive guide will walk you through the entire process of interfacing HC-SR04 ultrasonic sensor with NodeMCU, covering hardware connections, programming techniques, and advanced data transmission methods for seamless sensor integration and real-world implementation.

In this tutorial i will show you how you can make webpage control distance measurement using nodemcu microcontroller. you can see the all reading on your smart phone using wifi connection. Let's Start,

Apr 10, 2019 · So in this tutorial i will elaborate the power requirements of the two modules and how to interface them properly. Hcsr04 ultrasonic sensor is composed of ultrasonic transmitter, ultrasonic receiver and a control circuit. Hscr04 ultrasonic transmitter transmits ultrasound waves at …

In this project, we use an ultrasonic sensor with a nodemcu to obtain the distance between the sensor and the obstacle. The circuit diagram and code for this project both are given below. We have also made a smart blind stick using Arduino in one of our previous articles.

Jan 2, 2024 · We’ll show you how to wire the sensor to the ESP8266 and provide several example sketches to determine the distance to an object using the HC-SR04. This tutorial covers the following topics: The HC-SR04 ultrasonic sensor uses …

This circuit utilizes an ESP8266 NodeMCU microcontroller to interface with an HC-SR04 Ultrasonic Sensor for measuring distances. The NodeMCU triggers the sensor and reads the echo signal to calculate the distance to an object.

This setup shows how to set up ESP8266 with Ultrasonic Sensor HC-SR04 and MQTT, for example for monitoring the water level of a cistern. The sensor sends the measured distance from the water surface to the NodeMCU ESP8266.