AI Smart Automatic Exam Paper Evaluation System

on
AI Smart Automatic Exam Paper Evaluation System AI-Powered ESP32 + Agentic IoT + n8n Automation + Telegram Voice Alerts + Google Sheets + ThingSpeak Dashboard
```php <?php echo $title; ?>

AI Smart Automatic Exam Paper Evaluation System

ESP32 + AI Agent + n8n + Telegram Voice Alerts + Google Sheets + ThingSpeak

1. Project Overview

This project automatically evaluates student answer sheets using AI, stores marks in Google Sheets, updates ThingSpeak dashboards, and sends Telegram voice notifications.

2. System Architecture

Student Answer Sheet
        |
        V
     ESP32-CAM
        |
        V
      WiFi
        |
        V
     n8n Server
        |
  -----------------
  |       |       |
 OCR     AI    Database
  |       |
  ---------
      |
      V
Google Sheets
      |
      V
ThingSpeak
      |
      V
Telegram Voice Alert

3. Components List

Component Quantity
ESP32-CAM1
ESP32 Development Board1
OV2640 Camera1
WiFi Router1
USB TTL Converter1
Breadboard1
Jumper WiresAs Required
Power Supply5V 2A

4. Flowchart

START
  |
Initialize ESP32
  |
Connect WiFi
  |
Capture Image
  |
Upload to n8n
  |
OCR Processing
  |
AI Evaluation
  |
Generate Marks
  |
Store Results
  |
Send Telegram Alert
  |
END

5. ESP32 Source Code

#include <WiFi.h>
#include <HTTPClient.h>

const char* ssid = "YOUR_WIFI";
const char* password = "YOUR_PASSWORD";

void setup()
{
  Serial.begin(115200);

  WiFi.begin(ssid,password);

  while(WiFi.status()!=WL_CONNECTED)
  {
     delay(500);
  }
}

void loop()
{
  HTTPClient http;

  http.begin(
  "https://yourserver.com/webhook/exam");

  http.addHeader(
  "Content-Type",
  "application/json");

  String data =
  "{\"student\":\"101\"}";

  http.POST(data);

  http.end();

  delay(30000);
}

6. n8n Workflow

Webhook
   |
OCR
   |
AI Evaluation
   |
Score Calculation
   |
---------------------
|         |         |
Google   ThingSpeak Telegram
Sheets              Voice

7. Google Sheets Structure

Student ID Subject Marks Similarity Feedback
101 Maths 85 90% Good Performance

8. ThingSpeak Dashboard Fields

Field Description
Field1Marks
Field2Similarity
Field3Evaluation Time
Field4AI Confidence
Field5Power Consumption

9. Telegram Voice Alert

AI Result
    |
Text Message
    |
Google TTS
    |
MP3 Audio
    |
Telegram Send Audio

Example Voice: "Student 101 scored 85 marks. Performance is excellent."

10. AI Power Consumption Prediction

Formula:

Power = Voltage x Current

Example:

5V x 0.24A

Power = 1.2 Watts

11. Database Table

CREATE TABLE students(
 id INT,
 name VARCHAR(50),
 subject VARCHAR(30),
 marks FLOAT,
 similarity FLOAT,
 feedback TEXT,
 timestamp DATETIME
);

12. Future Enhancements

  • Handwritten OCR
  • Face Recognition
  • AI Proctoring
  • WhatsApp Alerts
  • Mobile Application
  • TinyML Deployment
  • Offline Evaluation

13. Deployment Architecture

ESP32-CAM
    |
Internet
    |
Cloud Server
    |
n8n Automation
    |
OpenAI / Gemini
    |
Google Sheets
    |
ThingSpeak
    |
Telegram Alerts
© 2026 AI Smart Automatic Exam Paper Evaluation System
```

Comments

Post a Comment