This Arduino project monitors voltage and current in real-time, performs Fast Fourier Transform (FFT) analysis on the collected data, and sends the results to ThingSpeak for visualization. The system uses an RTC for precise timing, an FFT library for signal processing, and a SIM7000 module for data communication.

Components

• Arduino MEGA 2560 Board: The main microcontroller.
• RTC DS3231: Real-Time Clock for accurate timekeeping.
• DFRobot_SIM7000 module: For GSM/GPRS communication with ThingSpeak.
• Analog Pins (A0, A1): For reading voltage and current signals.
• TimerOne: For precise sampling of voltage and current.

Setup

 Hardware Connections
 1) Voltage and Current Sensors:
    - Connect the voltage sensor to A0.
    - Connect the current sensor to A1.
 2) SIM7000 Module:
    - Connect TX to Arduino pin 10.
    - Connect RX to Arduino pin 7.
 3) RTC DS3231:
    - Connect to the I2C pins (SDA and SCL) on the Arduino.

Software Setup

 1) Install the required libraries through the Arduino Library Manager.
 2) Configure your ThingSpeak API key by setting the THINGSPEAK_API_KEY macro in the code.