update

README-en.md

@@ -115,6 +115,30 @@ Once motion is detected, it must persist for **3 consecutive cycles** before the
 
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+## OLED Display
+
+The firmware supports a **0.96-inch SSD1306 128×64 I2C OLED display** connected to the ESP32-S3 as follows:
+
+| OLED pin | ESP32-S3 pin |
+|---|---|
+| VCC | 3.3V |
+| GND | GND |
+| SDA | GPIO 6 |
+| SCL | GPIO 7 |
+
+The default I2C address is `0x3C`. The OLED uses the `Wire` interface initialized with `Wire.begin(6, 7)`.
+
+Install these libraries using Arduino IDE's Library Manager:
+
+- **Adafruit SSD1306** by Adafruit
+- **Adafruit GFX Library** by Adafruit
+
+The main display page shows the Wi-Fi status, RSSI, confidence, signal quality, baseline, variance, and total detections. A technical detail page is implemented in the sketch, but page rotation is currently disabled in `loop()`, so the main page is displayed continuously.
+
+If the display does not initialize, verify the 3.3V power, common ground, SDA/SCL wiring, and the `OLED_ADDRESS` value in `WiFiSense.ino`.
+
+---
+
 ## Real-Time Outputs
 
 ### Serial Plotter (Graphs)
@@ -225,8 +249,8 @@ To exceed 90% accuracy, you'd need:
 
 3. **Install Required Libraries**
    - `Tools > Manage Libraries`
-   - `WiFi.h` is included with ESP32 board support
-   - No external libraries needed! ✓
+   - `WiFi.h` and `Wire.h` are included with ESP32 board support
+   - Install **Adafruit SSD1306** and **Adafruit GFX Library**
 
 4. **Configure Board Settings**
    ```
@@ -417,9 +441,24 @@ Not implemented but possible:
 
 ---
 
-## License
+## Source-Available License
 
-This project is provided as-is for educational and personal use.
+Copyright (c) 2026 Tran Thanh Tan / [TTAI Solutions Software](https://ttaisolutions.com/).
+
+All rights reserved.
+
+Permission is granted to view, download, install, and use this software for personal, educational, and internal organizational purposes.
+
+Modification for personal or internal use is permitted.
+
+Without prior written permission from the copyright holder, you may not:
+
+1. Sell, resell, sublicense, or commercially distribute this software or any substantial portion of its source code.
+2. Offer this software, whether modified or unmodified, as a commercial product, hosted service, or paid SaaS offering.
+3. Bundle this software with hardware or other products for resale.
+4. Remove or alter copyright notices or claim authorship of the original software.
+
+Commercial licensing inquiries: https://ttaisolutions.com
 
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@@ -433,7 +472,8 @@ This project is provided as-is for educational and personal use.
 - [ ] LED responding to movement
 - [ ] Placed in optimal position (3-5m from router)
 - [ ] Waited 2-3 minutes for calibration
-- [ ] Tested by walking past ESP8266
+- [ ] Tested by walking past the ESP32-S3
+- [ ] OLED displays the Wi-FiSense status page
 
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