BlynkBridge

Fire Detection Monitor

Connect your ESP32 + MQ-2 fire and smoke detection project to BlynkBridge for real-time monitoring and advanced analytics.

Real-time smoke and temperature readings

Alarm event history and statistics

Remote configuration and code editor

Telegram bot alerts integration

Project Credentials

Account Email

Password

Auth Token (Token)

Device Name

Server Region

Project PIN Code

Your credentials are stored locally in your browser only

Alarms Today

0

0 today compared with 4 yesterday

Smoke / Gas Level

1900

ppm — Recorded level

Flame Level

120 °C

Flame sensor reading

Detection Quality

لا توجد

No false or missed alarms

Latest Events

Alarms per Day

Total this week23 alarms

Avg per day3.3

Worst dayThursday (8)

Sensor Readings (Last Measurement)

Smoke (ppm)1900

Temperature (°C)120

Humidity (%)58

Alarm Limit3 seconds

Sensor StatusCalibrated

Last ReadingYesterday 8:33 PM

Device Info

DeviceFire and smoke shatt al-arab

Firmwarev2.1.4

WiFi Signal2.4GHz

IP Address192.168.1.105

ConnectionOffline

Boot Count67

Response Time (seconds)

3 2.5 2 1.5 1 0.5 0

0.8

1.4

2.1

Gas / Smoke

0.3

0.6

0.9

Flame

0.3

0.5

0.8

Combined

0.9

1.6

2.8

Blynk Notification

Minimum (s)

Average (s)

Maximum (s)

System Response Time (Minimum / Average / Maximum)

main.ino — ESP32 Blynk

#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID   "TMPL68T1lazG-"
#define BLYNK_TEMPLATE_NAME "Fire System"
#define BLYNK_AUTH_TOKEN    "sXyKUVnniU16qT8rEU6gJtRY_OzvoQkB"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>

char ssid[] = "AEC_2G";
char pass[] = "Aa20252025@";

#define FLAME_PIN   32
#define GAS_PIN     33
#define LED_GREEN   25
#define LED_RED     26
#define BUZZER_PIN  27

bool alertSent = false;

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

  pinMode(FLAME_PIN, INPUT);
  pinMode(GAS_PIN, INPUT);
  pinMode(LED_GREEN, OUTPUT);
  pinMode(LED_RED, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);

  digitalWrite(LED_GREEN, HIGH);
  digitalWrite(LED_RED, LOW);
  digitalWrite(BUZZER_PIN, LOW);

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
}

void loop() {
  Blynk.run();

  bool flameDetected = digitalRead(FLAME_PIN) == LOW;
  bool gasDetected = digitalRead(GAS_PIN) == LOW;

  if (!flameDetected && !gasDetected) {
    digitalWrite(LED_GREEN, HIGH);
    digitalWrite(LED_RED, LOW);
    digitalWrite(BUZZER_PIN, LOW);

    Blynk.virtualWrite(V0, "SAFE");
    alertSent = false;
  } else {
    digitalWrite(LED_GREEN, LOW);
    digitalWrite(LED_RED, HIGH);
    digitalWrite(BUZZER_PIN, HIGH);

    if (flameDetected && gasDetected) {
      Blynk.virtualWrite(V0, "FIRE & GAS");
    } else if (flameDetected) {
      Blynk.virtualWrite(V0, "FIRE DETECTED");
    } else {
      Blynk.virtualWrite(V0, "GAS DETECTED");
    }

    if (!alertSent) {
      Blynk.logEvent("fire_gas_alert", "Fire or Gas Detected");
      alertSent = true;
    }
  }

  delay(300);
}

Project Variables

BLYNK_TEMPLATE_ID

string — Blynk template identifier

BLYNK_TEMPLATE_NAME

string — Blynk project name

BLYNK_AUTH_TOKEN

string — Device authentication token

WIFI_SSID

string — Network name

string — WiFi password

FLAME_PIN

int — Flame sensor digital input

GAS_PIN

int — Gas/smoke sensor digital input

LED_GREEN

int — Safe status LED pin

LED_RED

int — Alert status LED pin

BUZZER_PIN

int — Active buzzer output

POLLING_DELAY

int — Sensor polling interval in milliseconds

Code Explanation

Connect Your Bot

Link a Telegram bot to your Blynk project. When a smoke alarm fires, you receive a notification with readings and timestamp.

Bot Token

Chat ID

Notification Settings

Smoke Alarm Alert

Device Offline Alert

Daily Summary Report

Low WiFi Signal Warning

Recent NotificationsBot stopped on March 27, 2026

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Fire Detection Monitor

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