MJRoBot
Published © GPL3+

IoT Motion Detector With NodeMCU and BLYNK

Every time a movement is detected by the sensor, a message is sent to a smartphone anywhere in the world!

EasyFull instructions provided8 hours10,996
IoT Motion Detector With NodeMCU and BLYNK

Things used in this project

Hardware components

NodeMCU ESP8266 Breakout Board
NodeMCU ESP8266 Breakout Board
×1
Motion Sensor HC-SR501
×1
LED (generic)
LED (generic)
Red
×1
Resistor 1k ohm
Resistor 1k ohm
×1
Resistor 2.21k ohm
Resistor 2.21k ohm
×1
Resistor 221 ohm
Resistor 221 ohm
×1

Software apps and online services

Arduino IDE
Arduino IDE
Blynk
Blynk

Story

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Schematics

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Code

Code snippet #1

Arduino
/* HC-SR501 Motion Detector */
#define ledPin D7 // Red LED
#define pirPin D1 // Input for HC-SR501

int pirValue; // variable to store read PIR Value

void setup() 
{
  pinMode(ledPin, OUTPUT);
  pinMode(pirPin, INPUT);
  digitalWrite(ledPin, LOW);
}

void loop() 
{
  pirValue = digitalRead(pirPin);
  digitalWrite(ledPin, pirValue);
}

Code snippet #2

Arduino
/**************************************************************
 * IoT Motion Detector with Blynk
 * Blynk library is licensed under MIT license
 * This example code is in public domain.
 * 
 * Developed by Marcelo Rovai - 30 November 2016
 **************************************************************/
#include <ESP8266WiFi.h>

#define BLYNK_PRINT Serial    // Comment this out to disable prints and save space
#include <BlynkSimpleEsp8266.h>
char auth[] = "YOUR AUTH CODE HERE";

/* WiFi credentials */
char ssid[] = "YOUR SSID";
char pass[] = "YOUR PASSWORD";

/* HC-SR501 Motion Detector */
#define ledPin D7 
#define pirPin D1 // Input for HC-S501
int pirValue; // Place to store read PIR Value

void setup()
{
  Serial.begin(115200);
  delay(10);
  Blynk.begin(auth, ssid, pass);
  pinMode(ledPin, OUTPUT);
  pinMode(pirPin, INPUT);
  digitalWrite(ledPin, LOW);
}

void loop()
{
  getPirValue();
  Blynk.run();
}

/***************************************************
 * Get PIR data
 **************************************************/
void getPirValue(void)
{
  pirValue = digitalRead(pirPin);
  if (pirValue) 
  { 
    Serial.println("==> Motion detected");
    Blynk.notify("T==> Motion detected");  
  }
  digitalWrite(ledPin, pirValue);
}

Credits

MJRoBot

MJRoBot

29 projects • 379 followers
Engineer, writer and forever student. Passionate to share knowledge of electronics with focus on IoT and robotics.

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