Smart Energy Meter

Here is a sample Python code for the smart energy meter:

#include <LiquidCrystal.h> #define CT_SENSOR A0 #define RS 12 #define EN 11 #define D4 5 #define D5 4 #define D6 3 #define D7 2 LiquidCrystal lcd(RS, EN, D4, D5, D6, D7); int energyReading; float voltage, current, power; void setup() { lcd.begin(16, 2); lcd.print("Smart Energy Meter"); delay(2000); lcd.clear(); } void loop() { energyReading = analogRead(CT_SENSOR); voltage = 5.0 * energyReading / 1024.0; current = voltage / 0.185; power = voltage * current; lcd.setCursor(0, 0); lcd.print("Voltage: "); lcd.print(voltage); lcd.print(" V"); lcd.setCursor(0, 1); lcd.print("Current: "); lcd.print(current); lcd.print(" A"); lcd.setCursor(9, 1); lcd.print("Power: "); lcd.print(power); lcd.print(" W"); delay(1000); lcd.clear(); }

This code uses the LiquidCrystal library to communicate with the LCD screen and the analogRead() function to read the value from the CT sensor. The energy reading is then processed to calculate the voltage, current, and power values. The values are then displayed on the LCD screen. The code continuously updates the values and displays them on the LCD screen.

To build the smart energy meter, you will need the following hardware and electronic items:

1. Arduino board (such as Arduino UNO)
2. Current transformer (CT) sensor
3. LCD screen
4. Breadboard
5. Jumper wires
6. 5V power supply
7. Resistor (0.185 ohm)

Here is a basic circuit diagram for connecting the components:

+---------+ | | | CT | | Sensor | | | +----|----+ | +-----/\/\/\-----+ | | | | | Arduino | | | +-----------------+ | +-------|-------+ | | | LCD Screen | | | +--------------+

The CT sensor is connected to the analog pin (A0) of the Arduino board. The LCD screen is connected to the digital pins (RS, EN, D4, D5, D6, D7) of the Arduino board using the LiquidCrystal library. The 0.185 ohm resistor is connected in series with the CT sensor to measure the current. The circuit is powered by a 5V power supply. The jumper wires are used to connect the components on the breadboard.

The CT sensor measures the current flowing through the wire and outputs a proportional voltage. The analogRead() function of the Arduino board is used to read the voltage value from the CT sensor. The voltage value is then processed to calculate the current and power values. The calculated values are then displayed on the LCD screen.