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IoT Pressure Monitor | MAX30100 + ESP8266

🌡️ IoT Pressure Monitor

MAX30100 + ESP8266 + LED Alert System

MAX30100 Pressure Monitor Dashboard
📊 Live Dashboard: Pressure 20.27 | Heart Rate 2027 bpm | SpO2 94.0%

📋 Overview

IoT-based Pressure Monitoring System using MAX30100 sensor with ESP8266. Real-time monitoring with visual LED alerts and web interface.

✨ Features

🟢 Smart LED Indicators

Green LED: Glows during normal monitoring

Red LED: Blinks when pressure high

Both OFF: Monitoring stopped

🌐 IoT Features

✓ Web dashboard
✓ Remote monitoring
✓ Adjustable threshold
✓ Start/Stop control

📊 Live Data

✓ Pressure: 20.27 units
✓ Heart Rate: 2027 bpm
✓ SpO2: 94.0%
✓ Threshold: 25.00

🔄 Process Flow

1
System Starts
Monitoring begins automatically
2
Normal Pressure
🟢 Green LED glows continuously
3
High Pressure
🔴 Red LED blinks
🟢 Green LED off
4
Pressure Normal
🟢 Green LED glows again
5
Stop Monitoring
⚫ Both LEDs OFF

🛠️ Components

  • 🔌 ESP8266 (NodeMCU)
  • 💓 MAX30100 Sensor
  • 🔴 Red LED + 220Ω resistor
  • 🟢 Green LED + 220Ω resistor
  • 🔗 Jumper wires & Breadboard
  • 🔋 USB Power Supply

🔌 Wiring

MAX30100ESP8266LEDs
VCC3.3V
GNDGND
SCLD1 (GPIO5)
SDAD2 (GPIO4)
Red LED → D5 (GPIO14) + 220Ωto GND
Green LED → D6 (GPIO12) + 220Ωto GND

💡 LED Behavior

🟢 Green LED

Normal: Continuous glow = Active monitoring with safe pressure

High Pressure: OFF

Stopped: OFF

🔴 Red LED

Normal: OFF

High Pressure: Blinking alert

Stopped: OFF

💻 Core Code

// LED Control Logic
if (isMonitoring) {
    if (currentPressure > threshold) {
        // High pressure - Red LED blinks
        digitalWrite(RED_LED, !digitalRead(RED_LED));
        digitalWrite(GREEN_LED, LOW);
        Serial.println("ALERT!");
    } else {
        // Normal - Green LED glows
        digitalWrite(RED_LED, LOW);
        digitalWrite(GREEN_LED, HIGH);
    }
} else {
    // Stopped - Both LEDs off
    digitalWrite(RED_LED, LOW);
    digitalWrite(GREEN_LED, LOW);
}

🎯 Benefits

🚨 Instant Visual Alerts

Red LED blinking gives immediate warning without looking at screen

🟢 Live Status

Green LED confirms system is actively monitoring

🌍 Remote Access

Monitor from any device on same network

IoT Pressure Monitor | MAX30100 + ESP8266

Real-time monitoring with LED alerts

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