safwan092

Rx-Code-Final-18-4-2021

Apr 17th, 2021
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  1. #include <RH_ASK.h>
  2. #include <SPI.h> // Not actualy used but needed to compile
  3.  
  4. // defines pins numbers for ultrasonic
  5. const int trigPin = 2;
  6. const int echoPin = 3;
  7. const int buzzer = 12;//used to be 11 now it is 12 [11 for receiver]
  8. const int ledPin = 13;
  9. // defines pins numbers for LDR
  10. const int ldr_pin = 7;
  11. const int led_pin = 4;
  12. //  Project by - Be innovative with Prasad
  13. //   title - ultrasonic sensor project with buzzer and Arduino
  14. // defines variables
  15. long duration;
  16. int distance;
  17. int safetyDistance;
  18.  
  19. int mss = 0;
  20. uint8_t buf[RH_ASK_MAX_MESSAGE_LEN];
  21. uint8_t buflen = sizeof(buf);
  22. RH_ASK driver;
  23.  
  24. void setup() {
  25.   //ultrasonic
  26.   pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
  27.   pinMode(echoPin, INPUT); // Sets the echoPin as an Input
  28.   pinMode(buzzer, OUTPUT);
  29.   pinMode(ledPin, OUTPUT);
  30.   Serial.begin(9600); // Starts the serial communication
  31.   // put your setup code here, to run once:LDR
  32.   pinMode(ldr_pin, INPUT);
  33.   pinMode(led_pin, OUTPUT);
  34.   Serial.begin(9600);
  35.   if (!driver.init())Serial.println("init failed");
  36. }
  37. void loop() {
  38.   int j = 5;
  39.   // Clears the trigPin
  40.   digitalWrite(trigPin, LOW);
  41.   delayMicroseconds(2);
  42.   // Sets the trigPin on HIGH state for 10 micro seconds
  43.   digitalWrite(trigPin, HIGH);
  44.   delayMicroseconds(10);
  45.   digitalWrite(trigPin, LOW);
  46.   // Reads the echoPin, returns the sound wave travel time in microseconds
  47.   duration = pulseIn(echoPin, HIGH);
  48.   // Calculating the distance
  49.   distance = duration * 0.034 / 2;
  50.   Serial.print("Distance: ");
  51.   Serial.println(distance);
  52.   safetyDistance = distance;
  53.   //Prints the distance on the Serial Monitor
  54.   if (safetyDistance <= 150 && safetyDistance >= 5) // You can change safe distance from here changing value Ex. 20 , 40 , 60 , 80 , 100, all in cm
  55.   {
  56.     j = safetyDistance * j;
  57.     digitalWrite(buzzer, HIGH);
  58.     digitalWrite(ledPin, HIGH);
  59.     delay(j);
  60.     digitalWrite(buzzer, LOW);
  61.     digitalWrite(ledPin, LOW);
  62.     delay(j);
  63.   }
  64.   delay(1);
  65.   // put your main code here, to run repeatedly:LDR
  66.    if ( digitalRead( ldr_pin ) == 1) {
  67.      if (driver.recv(buf, &buflen)) // Non-blocking
  68.      {
  69.        int i;
  70.  
  71.        // Message with a good checksum received, dump it.
  72.        driver.printBuffer("Got:", buf, buflen);
  73.        mss = atoi(buf);
  74.      }
  75.      Serial.print("mss is set to :");
  76.      Serial.println(mss);
  77.      if (mss == 1) {
  78.        digitalWrite( led_pin, LOW);
  79.      }
  80.      else {
  81.        digitalWrite( led_pin, HIGH);
  82.      }
  83.     }
  84.     else {
  85.      digitalWrite( led_pin , LOW);
  86.     }
  87.     Serial.println( digitalRead( ldr_pin ));
  88.     delay(100);
  89. }                                   //  Project by - Be innovative with Prasad
  90. //   title - ultrasonic sensor project with buzzer and Arduino
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