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@@ -1,20 +1,91 @@
-# Relay8I2C Library
-**By Fatima @ FABLAB Bahrain**
+# I2C Communication Library
 
-![FABLAB Bahrain Logo](https://via.placeholder.com/150x50.png?text=FABLAB+Bahrain)
+This library provides functionalities for I2C communication, specifically designed for controlling devices that support the I2C protocol. It includes utilities for scanning I2C buses, changing slave addresses, and handling commands.
 
-Control 8-relay modules via I2C with dynamic address configuration. Designed for ESP8266 and Arduino platforms.
+## Table of Contents
 
-## Features
-- I2C communication protocol
-- Dynamic slave address configuration
-- Master controller with serial interface
-- Active LOW relay support
-- EEPROM storage for persistent addressing
+1. [Overview](#overview)
+2. [Files](#files)
+3. [Class: I2CMasterUtils](#class-i2cmastertools)
+4. [Class: I2CRelay](#class-i2crelay)
+5. [Usage Example](#usage-example)
 
-## Installation
-1. Download the library ZIP
-2. Arduino IDE: Sketch > Include Library > Add .ZIP Library
-3. Select the downloaded ZIP file
+## Overview
 
-## Usage
+The library provides functionalities for I2C communication, specifically designed for controlling devices that support the I2C protocol. It includes utilities for scanning I2C buses, changing slave addresses, and handling commands.
+
+## Files
+
+The library is composed of several files, each with a specific role:
+
+1. **I2CMasterUtils.h** [3]
+   - This header file defines the `I2CMasterUtils` class which contains static methods for I2C operations such as scanning for devices and changing slave addresses.
+   
+2. **I2CMasterUtils.cpp** [2]
+   - Contains the implementation of methods defined in `I2CMasterUtils.h`.
+   
+3. **I2CRelay.h** [5]
+   - Defines the `I2CRelay` class, which extends the functionality to control relays over I2C.
+   
+4. **I2CRelay.cpp** [4]
+   - Contains the implementation of methods for the `I2CRelay` class.
+
+## Class: I2CMasterUtils
+
+### Static Methods
+
+- **scanI2C(Stream &output = Serial)**
+  - Scans the I2C bus for connected devices and prints their addresses.
+  
+- **changeSlaveAddress(uint8_t oldAddr, uint8_t newAddr, Stream &output = Serial)**
+  - Sends a command to change the slave address of a device.
+
+- **parseChangeAddressCommand(const String &input, uint8_t &oldAddr, uint8_t &newAddr)**
+  - Parses an input string to extract the old and new slave addresses from a "ch" command.
+
+## Class: I2CRelay
+
+### Methods
+
+- **I2CRelay(uint8_t slaveAddress)**
+  - Constructor that initializes the `I2CRelay` object with the given slave address.
+  
+- **begin()**
+  - Initializes the I2C bus for communication.
+  
+- **setRelay(uint8_t relayIndex, bool state)**
+  - Sets the state of a specific relay on the slave device.
+
+- **scanDevices(uint8_t* foundAddresses, uint8_t maxDevices)**
+  - Scans the I2C bus for connected devices and returns their addresses up to `maxDevices`.
+  
+- **setAddress(uint8_t newAddress)**
+  - Changes the address of the relay slave.
+  
+- **handleI2CCommand()**
+  - Handles incoming I2C commands.
+
+## Usage Example
+
+To use this library, you would typically include the necessary files and create instances of `I2CMasterUtils` and `I2CRelay`. Here’s a simple example:
+
+```cpp
+#include "I2CMasterUtils.h"
+#include "I2CRelay.h"
+
+void setup() {
+  Serial.begin(9600);
+  
+  I2CMasterUtils::scanI2C();
+  
+  uint8_t newAddress = 0x54;
+  uint8_t oldAddress = CMD_CHANGE_ADDR; // Assuming CMD_CHANGE_ADDR is defined in I2CCommands.h
+  I2CMasterUtils::changeSlaveAddress(oldAddress, newAddress);
+}
+
+void loop() {
+  // Example usage of I2CRelay
+  I2CRelay relay(0x54); // Use the newly assigned address
+  relay.begin();
+  relay.setRelay(1, HIGH); // Set relay 1 to ON
+}
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