Motion Detection System - Source Code

Arduino IDE Source Code/Motion_Detection_System_-_Source_Code.ino

+#include <SPI.h>
+#include <ThingSpeak.h>
+#include <WiFiNINA.h>
+
+int sensor = 2; // Establishes the PIR motion sensor to use Pin 2 
+int led = 13; // Establishes the LED light to use Pin 13
+int motion = 0; // Variable to be used as a status code: 0 indicates no motion, 1 indicates motion
+
+const char ssid[] = "********"; // WiFi set-up variables (change if relocating)
+const char password[] = "********";
+
+const unsigned long channel_id = 2010206; // Establishes the correct credentials for the ThingSpeak Channel
+const char write_api_key[] = "VE3UTMCYSQAIY2AQ";
+
+WiFiClient client;
+
+void setup(){
+
+    pinMode(led, OUTPUT); // Sets up the testing LED as an output device
+    pinMode(sensor, INPUT); // Sets up the PIR sensor as an input device
+    Serial.begin(9600); // Configures the baud rate
+
+    WiFi.begin(ssid, password); // Establishes the Arduino's connection to the WiFi network. 
+    Serial.println("Connected to WiFi network.");
+    Serial.println();
+    
+    ThingSpeak.begin(client);
+
+    Serial.println("Sensor initialising. You have 30 seconds to leave the area without triggering the alert. Once triggered, the sensor will wait 1 minute to re-test for motion.");
+
+    delay(30000); // Waits thirty seconds to allow a user to leave the room they need monitored and not affect the sensor
+    Serial.println("Sensor ready and watching."); // Assuming the user has left the area, the sensor can now wait for motion.
+
+}
+
+void loop(){
+
+    if(digitalRead(sensor)) { // If the PIR sensor detects a motion (voltage is sent high when motion is detected, creating the signal)
+
+        motion = 1; // Changes the variable to reflect that there is now motion detected (value of 1)
+
+        Serial.print("Status ");
+        Serial.print(motion);
+        Serial.println(": Motion detected. Uploading motion data to ThingSpeak."); // Indicates the detection of a motion to the serial monitor
+
+        digitalWrite(led, HIGH);   // Turns the LED on (testing purposes)
+
+        ThingSpeak.setField(1, String(motion)); 
+        ThingSpeak.writeFields(channel_id, write_api_key); // Writes the motion status to ThingSpeak
+
+        delay(60000); // Sets a delay of 1 minute before the next motion can be identified
+}
+
+    else{ // If no motion is detected
+
+        motion = 0; // Returns the value to its default state so that it can be re-triggered
+
+        Serial.print("Status ");
+        Serial.print(motion);
+        Serial.println(": No motion"); // Indicates no detection of motion to the serial monitor
+        
+        digitalWrite(led, LOW); // The LED is turned off
+
+        ThingSpeak.setField(1, String(motion));
+        ThingSpeak.writeFields(channel_id, write_api_key); // Uploads the 0 motion status to ThingSpeak to return it to its default state
+
+        delay(5000); // Sets a delay of 5 seconds before the next motion can be identified
+    }
+
+    //motion = 0; // Returns the value to its default state so that it can be re-triggered
+    //ThingSpeak.setField(1, String(motion));
+    //ThingSpeak.writeFields(channel_id, write_api_key); // Uploads the 0 motion status to ThingSpeak to return it to its default state
+
+    //delay(3000); // Sets a delay before the sensor can be re-triggered
+
+}
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