AI-Based Smart Flood Detection and Early Warning System

AI-Based Smart Healthcare Assistant Chatbot with IoT Sensors https://svsembedded.wordpress.com/2026/06/18/ai-based-smart-flood-detection-and-early-warning-system/ ESP32 + AI Agent + n8n Automation + Telegram Voice Alerts + Google Sheets + ThingSpeak Cloud Dashboard

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AI-Based Smart Healthcare Assistant Chatbot with IoT Sensors

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1. Project Overview

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This project is an AI-powered Smart Healthcare Monitoring System using:

• ESP32 Microcontroller
• MAX30102 Heart Rate & SpO2 Sensor
• DHT22 Temperature & Humidity Sensor
• ThingSpeak Cloud Dashboard
• n8n Automation
• Telegram Bot Alerts
• Google Sheets Logging
• Voice Notification System

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2. Components List

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Component	Quantity	Purpose
ESP32 Dev Board	1	Main Controller
MAX30102 Sensor	1	Heart Rate & SpO2 Monitoring
DHT22 Sensor	1	Temperature & Humidity
OLED Display	1	Display Sensor Data
Buzzer	1	Emergency Alert
LEDs	2	Status Indicators
Breadboard	1	Circuit Prototyping
Jumper Wires	Several	Connections

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3. Circuit Connections

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Sensor	ESP32 Pin
DHT22 DATA	GPIO4
MAX30102 SDA	GPIO21
MAX30102 SCL	GPIO22
Buzzer	GPIO18
OLED SDA	GPIO21
OLED SCL	GPIO22

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4. System Flowchart

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START
↓
Initialize ESP32
↓
Connect WiFi
↓
Read Sensor Data
↓
Analyze Health Conditions
↓
Upload to ThingSpeak
↓
Send Data to n8n
↓
Store in Google Sheets
↓
Check Alert Conditions
↓
Send Telegram Voice Alert
↓
Repeat Loop

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5. ESP32 Arduino Source Code

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#include <WiFi.h>
#include <HTTPClient.h>
#include "ThingSpeak.h"
#include "DHT.h"

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

WiFiClient client;

unsigned long channelID = YOUR_CHANNEL_ID;
const char* writeAPIKey = "YOUR_API_KEY";

#define DHTPIN 4
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

float temperature;
float humidity;
int heartRate = 78;
int spo2 = 97;

void setup(){
Serial.begin(115200);
WiFi.begin(ssid, password);

while(WiFi.status() != WL_CONNECTED){
delay(1000);
Serial.println("Connecting...");
}

ThingSpeak.begin(client);
dht.begin();
}

void loop(){
temperature = dht.readTemperature();
humidity = dht.readHumidity();

ThingSpeak.setField(1, temperature);
ThingSpeak.setField(2, humidity);
ThingSpeak.setField(3, heartRate);
ThingSpeak.setField(4, spo2);

ThingSpeak.writeFields(channelID, writeAPIKey);

delay(15000);
}

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6. ThingSpeak Setup

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1. Create ThingSpeak Account
2. Create New Channel
3. Add 4 Fields
4. Copy Channel ID
5. Copy Write API Key
6. Paste into ESP32 Code

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7. Telegram Bot Setup

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1. Open Telegram
2. Search BotFather
3. Type /newbot
4. Enter Bot Name
5. Enter Username
6. Copy Bot Token

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

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8. n8n Workflow

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Workflow Process:

Webhook Trigger
↓
Receive Sensor Data
↓
Save to Google Sheets
↓
Analyze Data
↓
IF abnormal condition
↓
Send Telegram Alert
↓
Generate Voice Notification

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9. Google Sheets Integration

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Column	Description
Timestamp	Date and Time
Temperature	Body Temperature
Humidity	Humidity Value
Heart Rate	BPM Value
SpO2	Oxygen Level

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10. AI Power Prediction Logic

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Power = Voltage × Current

AI adjusts upload frequency based on battery percentage.

Battery Level	Action
> 70%	Upload every 15 seconds
40% - 70%	Upload every 1 minute
< 40%	Deep Sleep Mode

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11. Voice Notification Automation

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Voice alerts are generated using:

• Google Text-to-Speech API
• Telegram Audio Messages
• n8n Automation

Emergency Warning.
Patient oxygen level is critically low.
Please seek medical assistance.

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12. Future Enhancements

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• Machine Learning Health Prediction
• Firebase Integration
• Mobile App Dashboard
• GPS Tracking
• ECG Monitoring
• Cloud AI Analytics

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13. Deployment Applications

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Application	Use Case
Hospitals	Patient Monitoring
Elderly Care	Remote Health Tracking
Fitness Monitoring	Health Analytics
Rural Healthcare	Remote Diagnostics

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14. Conclusion

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This AI-Based Smart Healthcare Assistant combines:

• IoT
• AI
• Cloud Computing
• Automation
• Healthcare Analytics

The system provides real-time monitoring, AI predictions, Telegram alerts, cloud dashboards, and automated healthcare assistance.

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15. Official Resources

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• n8n Official Website
• ThingSpeak
• Telegram Bot API
• Arduino IDE
• ESP32 Documentation

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