RecoNode

Reconnaissance with NodeMCU and Ultrasonic Sensor (HC-SR04) with real time notifications from https://ntfy.sh

Overview

This project utilizes an ESP8266 microcontroller and an ultrasonic sensor to detect nearby objects. When an object is detected within a specified range, it sends an alert message over Wi-Fi.

Requirements

• Arduino IDE
• ESP8266WiFi library
• ESP8266HTTPClient library
• WiFiClientSecure library

Circuit Diagram

Installation

1. Clone this repository.
2. Open the project in Arduino IDE / VS CODE.
3. Install the required libraries if not already installed:
   • ESP8266WiFi
   • ESP8266HTTPClient
   • WiFiClientSecure
4. Update the following variables in main.cpp(/src):
   • ssid: Your Wi-Fi network name.
   • password: Your Wi-Fi password.
   • Adjust echoPin and trigPin if your sensor is connected to different GPIO pins.
   • Adjust http.begin and payload with your ntfy.sh topic and your message.

Usage

1. Upload the sketch to your ESP8266 board.
2. Open the Serial Monitor to view sensor readings and debug messages.
3. Ensure the board connects to Wi-Fi successfully.
4. Observe the board's behavior when objects are detected within 20 cm of the sensor.