AC_CURRENT_MEASUREMENT

Project overview

Develop a system that measures AC current irrespective of the load and calculates the energy consumed in kilowatt-hours (kWh). The system will utilize an STM32F103C8T6 microcontroller and a ZMCT103 current sensor. The data will be saved in EEPROM and displayed on an LCD to show the current energy consumption. The project will leverage I2C, UART, and timer functionalities.

Key Features

1. AC Current Measurement: Accurately measure AC current with the ZMCT103 sensor.
2. Energy Calculation: Calculate energy consumption in kWh based on measured current.
3. Data Storage: Save measurement data in EEPROM for later analysis.
4. User Interface: Display current energy consumption on an LCD.
5. Communication Interfaces: Utilize I2C for the EEPRom and timers for periodic updates.

Components Needed

1. STM32F103C8T6 Microcontroller: Central processing unit for the project.
2. ZMCT103 Current Sensor: For measuring AC current.
3. LCD Display: To show the current energy consumed.
4. EEPROM: For storing measurement data.
5. Supporting Components: Breadboard, jumper wires, power supply, etc.

Project Plan

1. Set Up Development Environment

(i) Install VS Code and necessary libraries for STM32 development.

2. Configure Hardware

(i)Microcontroller Setup: Connect the ZMCT103 sensor and LCD to the STM32.

3. Firmware Development

(i) Initialize Peripherals:

• Current Sensor Configuration: Set up the ZMCT103 for accurate current measurement.
• LCD Configuration: Configure the LCD for displaying information via I2C.
• Timer Setup: Set timers for periodic updates to the LCD.

4. Data Acquisition and Processing:

(i) Measure current and calculate energy consumed.

(ii) Store data in EEPROM.

5. User Interface:

(i) Implement functions to display current energy consumption on the LCD.

Detailed Steps

1. Set Up Current Sensor

(i) Connect the ZMCT103 to the STM32 and calibrate for accurate readings.

2. Configure LCD via I2C

(i) Set up I2C communication and display relevant information on the LCD.

3. Implement Data Storage

(i) Define EEPROM structure for storing current measurements and energy calculations.

4. Create Timer Interrupts

(i) Set up a timer to update the LCD display with current energy consumption at regular intervals.

5. Final Validation

(i) Test the system by measuring known AC loads and verifying the energy calculations.