NodeMCU Monitoring Tool

Overview

This project sets up a NodeMCU board as a simple monitoring tool that reads sensor data and displays it on a web interface. The tool allows you to view system information, including free memory and CPU frequency, and update Wi-Fi credentials.

Features

• Connects to a Wi-Fi network.
• Displays real-time sensor data (default is an analog reading from pin A0).
• Shows system information (free memory and CPU frequency).
• Provides a web form for updating Wi-Fi credentials.

Requirements

Hardware

• NodeMCU (ESP8266) development board.
• Analog sensor (optional, for testing; can use a potentiometer).

Software

• Arduino IDE with ESP8266 board package installed.
• Libraries:
  • ESP8266WiFi
  • ESP8266WebServer
  • EEPROM

Setup Instructions

1. Install Arduino IDE: If you haven't already, download and install the Arduino IDE.

2. Install ESP8266 Board Package:

   • Open the Arduino IDE.
   • Go to File > Preferences.
   • In the "Additional Board Manager URLs" field, add:

     http://arduino.esp8266.com/stable/package_esp8266com_index.json
     

   • Go to Tools > Board > Board Manager, search for "ESP8266", and install the package.

3. Clone or Download the Repository:

   • Clone this repository or download it as a ZIP file and extract it.

4. Open the Code:

   • Open the provided .ino file in the Arduino IDE.

5. Configure Wi-Fi Credentials:

   • In the code, replace your_SSID and your_PASSWORD with your actual Wi-Fi credentials.

6. Upload the Code:

   • Connect your NodeMCU to your computer.
   • Select the appropriate board and port in the Arduino IDE (Tools > Board > NodeMCU 1.0 (ESP-12E Module) and Tools > Port).
   • Click the upload button.

7. Access the Web Interface:

   • Open the Serial Monitor (Tools > Serial Monitor) to find the IP address assigned to your NodeMCU.
   • Enter this IP address in a web browser to access the monitoring tool.

Usage

• The web interface will display the current sensor value, free memory, and CPU frequency.
• Use the provided form to update Wi-Fi credentials.

Customization

• To read different sensor data, replace the analogRead(A0) line in the code with the appropriate reading logic for your sensor.
• Modify the HTML in the getHTML() function to customize the web interface.

License

This project is licensed under the MIT License. Feel free to modify and use the code for your projects.