🚨 ESP32 Vibration Alert & GPS Location Sender with Telegram Integration

This project uses an ESP32, a vibration sensor, a GPS module, and a 16x2 I2C LCD to detect vibration patterns and send alerts or live GPS locations to a Telegram bot. It’s useful for emergency alerts, security systems, or personal safety devices.

📱 Features

Triple Tap (3x) → Sends a “Help!” alert via Telegram

Quad Tap (4x) → Sends a “Call me!” message via Telegram

Five Tap (5x) → Reads GPS coordinates and sends a Google Maps link

LCD Display → Shows system status and incoming Telegram messages

Wi-Fi Connection → Uses your phone’s hotspot or local router

Telegram Bot → Communicates alerts and receives commands

🧠 How It Works

The vibration sensor detects quick consecutive taps.

Depending on how many taps are detected, it performs a specific action:

3 taps → Send “Help!”

4 taps → Send “Call me!”

5 taps → Fetch GPS and send current location link

The GPS module (via TinyGPS++) provides real-time latitude and longitude.

The ESP32 sends the message to Telegram using HTTPS requests through the Telegram Bot API.

The LCD display updates status messages such as connection, tap detection, and message sending.

⚙️ Hardware Components Component Description ESP32 Main microcontroller with Wi-Fi Vibration Sensor Detects tap/vibration patterns GPS Module (e.g., NEO-6M) Provides latitude & longitude I2C LCD (16x2) Displays system messages Jumper Wires For connections Power Source USB or external 5V 🔌 Pin Connections Module ESP32 Pin Description Vibration Sensor D14 Signal pin GPS TX D27 TX from GPS to ESP32 RX GPS RX D26 RX from GPS to ESP32 TX LCD I2C SDA (21), SCL (22) Default I2C pins 🧩 Libraries Used

Install the following libraries in the Arduino IDE:

WiFi.h (built-in)

WiFiClientSecure.h (built-in)

HTTPClient.h (built-in)

ArduinoJson (for parsing Telegram responses)

LiquidCrystal_I2C (for the LCD)

TinyGPSPlus (for GPS data parsing)

🪄 Setup Instructions

Create a Telegram Bot

Open Telegram and search for @BotFather

Send /newbot and follow the instructions

Copy your bot token

Get Your Chat ID

Start your bot by sending any message to it

Open:

https://api.telegram.org/bot/getUpdates

Look for "chat":{"id":...} in the response

Configure the Code Edit the following fields in the code:

const char* ssid = "YourWiFiSSID"; const char* password = "YourWiFiPassword"; const char* botToken = "YourBotToken"; String chatID = "YourChatID";

Upload the Code

Select ESP32 Dev Module in Arduino IDE

Set proper COM port

Upload the sketch

Monitor Serial Output Open Serial Monitor at 115200 baud to see connection and GPS logs.

📟 LCD Display Messages Display Message Meaning Connecting WiFi Trying to connect to hotspot/router WiFi Connected Successfully connected Vibration Ready Ready to detect taps 3 taps detected Help alert sent 4 taps detected Call alert sent 5 taps detected Sending GPS location GPS sent! Location message sent successfully GPS failed! GPS data not available 📡 Telegram Commands (Optional)

You can also send messages to the ESP32 via Telegram. When a message is received, it shows on the LCD display (first 16 characters).

🧭 Example Telegram Output Help! 3 vibrations detected! Call me! 4 vibrations detected! My Location: https://maps.google.com/?q=23.780000,90.410000

⚠️ Notes

Ensure the GPS module has a clear view of the sky for accurate readings.

Keep the vibration sensor sensitive enough but not too noisy.

You can modify vibration count thresholds to add more actions.

🧑‍💻 Author

Developed by: Rajorshi Platform: Arduino (ESP32) Language: C++ Purpose: Safety alert system using Telegram and GPS