Code for IOT Project

Code

+#include <Stepper.h>
+#include <Wire.h>
+#include <SPI.h>
+#include <WiFiNINA.h>
+#include <ThingSpeak.h>
+#include <LiquidCrystal.h>
+
+// initialize the library by associating any needed LCD interface pin
+// with the arduino pin number it is connected to
+const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
+LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
+
+int x = 0;
+int y = 0;
+int LightOn = 1;
+int LightOff = 0;
+const int stepsPerRevolution = 200;
+// Create a Stepper object using the specified pins
+Stepper myStepper(stepsPerRevolution, 4, 10, 7, 13);
+
+ 
+
+const char ssid[] = "BT-8GAJC3";
+const char pass[] = "M4JYKE6C3DrVYH";
+
+const unsigned long channel_id = 1984932;
+const char write_api_key[] = "5L5MP1LB128S79N4";
+WiFiClient client;
+
+#define trigPin 8
+#define echoPin 9
+ 
+float duration, distance;
+ 
+void setup() {
+myStepper.setSpeed(150); // Set the speed of the stepper motor
+
+  // set up the LCD's number of columns and rows:
+  lcd.begin(16, 2);
+  
+  Serial.begin(9600);
+  Serial.print("Connecting to ");
+  Serial.print(ssid);
+  WiFi.begin(ssid, pass);
+  Serial.println();
+  Serial.println("Connected!");
+  ThingSpeak.begin(client);
+
+  pinMode(trigPin, OUTPUT);
+  pinMode(echoPin, INPUT);
+}
+ 
+void loop() {
+  // Write a pulse to the HC-SR04 Trigger Pin
+  digitalWrite(trigPin, LOW);
+  delayMicroseconds(2);
+  digitalWrite(trigPin, HIGH);
+  delayMicroseconds(10);
+  digitalWrite(trigPin, LOW);
+  
+  // Measure the response from the HC-SR04 Echo Pin
+  duration = pulseIn(echoPin, HIGH);
+  
+  // Determine distance from duration
+  // Use 343 metres per second as speed of sound
+  distance = (duration / 2) * 0.0343;
+  
+  // Send results to Serial Monitor
+  Serial.print("Distance = ");
+  if (distance >= 400 || distance <= 2) {
+     Serial.println("Out of range");
+  }
+  else {
+
+ if (distance > 105bn  ) {
+    y = 0;
+    ThingSpeak.setField(2, LightOn);
+  ThingSpeak.writeFields(channel_id, write_api_key);
+  
+    while(x < 8){
+      myStepper.step(stepsPerRevolution);
+      x++;
+    }
+  }
+  // If the sensor value is less than 30, move the stepper motor 5 revolutions backward
+  else if  (distance < 105) {
+    x = 0;
+     ThingSpeak.setField(2, LightOff);
+  ThingSpeak.writeFields(channel_id, write_api_key);
+  
+    while(y < 5){
+      myStepper.step(-stepsPerRevolution);
+      y++;
+    }
+  }
+}
+
+
+    Serial.print(distance);
+    Serial.println(" cm");
+  
+  
+  // Print a message to the LCD.
+  lcd.clear();
+  lcd.print(distance);
+  lcd.print(" cm");
+  
+  ThingSpeak.setField(1, distance);
+  ThingSpeak.writeFields(channel_id, write_api_key);
+}
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