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+# ESP32 Washing Machine Activity Notifier
+
+This project turns an ESP32 into a smart device that monitors a washing machine's activity using vibration and light sensors and sends notifications when a cycle starts and finishes. It also displays the current status on an OLED display.
+
+## Features
+
+- **Vibration Sensing:** Detects machine operation by monitoring vibrations.
+- **Light Sensing:** Detects the machine's internal light to determine if the door is open.
+- **Status Display:** Shows real-time sensor data and device status on a small OLED display.
+- **Notifications:** Sends start and stop notifications to a `ntfy.sh` topic.
+- **WiFi Connectivity:** Connects to your local WiFi network.
+
+## Hardware Requirements
+
+- ESP32 development board
+- SW-420 vibration sensor module (or similar)
+- BH1750 light sensor module
+- SSD1306 128x64 OLED display (I2C)
+- Breadboard and jumper wires
+
+## Pinout
+
+| Component              | Pin on ESP32 |
+| -------------------    | ------------ |
+| Vibration Sensor       | GPIO 4       |
+| I2C SCL (OLED, BH1750) | GPIO 22      |
+| I2C SDA (OLED, BH1750) | GPIO 21      |
+
+### Wiring Diagram
+
+```
++-----------------+      +-----------------+      +-----------------+      +-----------------+
+| ESP32 Dev Board |      | Vibration Sensor|      |  BH1750 Sensor  |      |   OLED Display  |
++-----------------+      +-----------------+      +-----------------+      +-----------------+
+| 3.3V            |----->| VCC             |----->| VCC             |----->| VCC             |
+| GND             |----->| GND             |----->| GND             |----->| GND             |
+| GPIO 4          |----->| OUT             |      |                 |      |                 |
+|                 |      +-----------------+      |                 |      |                 |
+| GPIO 22 (SCL)   |------------------------------>| SCL             |----->| SCL             |
+| GPIO 21 (SDA)   |------------------------------>| SDA             |----->| SDA             |
++-----------------+                               +-----------------+      +-----------------+
+```
+
+## Setup & Usage
+
+1.  **Install Libraries:**
+    - Open the Arduino IDE and go to `Sketch` > `Include Library` > `Manage Libraries...`.
+    - Install the following libraries:
+        - `Adafruit SSD1306` by Adafruit
+        - `Adafruit GFX Library` by Adafruit
+        - `BH1750` by Christopher Laws
+
+2.  **Configure the Code:**
+    - Open the `esp32_MachineNotify.ino` file.
+    - Replace the placeholder values for `WIFI_SSID`, `WIFI_PASSWORD`, and `NTFY_TOPIC` with your WiFi credentials and desired `ntfy.sh` topic.
+
+3.  **Upload the Code:**
+    - Connect your ESP32 board to your computer.
+    - Select the correct board and port in the Arduino IDE.
+    - Click the upload button.
+
+4.  **Deploy the Device:**
+    - Place the vibration sensor on the washing machine where it can detect vibrations from the spin cycle.
+    - Place the light sensor inside the machine's drum to detect the internal light.
+
+## Code Explanation
+
+The code is structured as follows:
+
+- **Includes and Definitions:** Includes the necessary libraries for WiFi, I2C devices, and the display. It also defines pins, thresholds, and other constants.
+- **`setup()`:** Initializes serial communication, I2C, sensors, the OLED display, and connects to WiFi.
+- **`loop()`:** This is the main part of the program.
+    - It continuously reads the values from the vibration and light sensors.
+    - It implements a non-blocking logic using `millis()` to check if the sensors have been in a certain state (e.g., vibration active or light level high) for a continuous period of 5 seconds.
+    - It updates the overall device state (`isDeviceActive`) based on the individual sensor states.
+    - If the device state changes, it calls `sendNotification()`.
+    - It calls `updateDisplay()` to show the latest data.
+- **`sendNotification()`:** Sends a POST request to the configured `ntfy.sh` topic with a message.
+- **`updateDisplay()`:** Manages the OLED display. It clears the screen and prints the current status of the sensors and the device. It also implements a scrolling feature to cycle through the displayed information every 2 seconds.