
Relay op ultrasone en licht sensor.

Aan de hand van de afstand en licht sterkte word bepaalt of het relais geschakeld moet worden. De afstand en lichtsterkte wordt van te voren bepaald en in gesteld. Aan de hand van het display kunnen de waardes (afstand en lichtsterkte), een naam en status weergegeven worden.
De arduino code
//projeckt RickB.eu
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x3F, 20, 4);
#define echoPin 2 // attach pin D2 Arduino to pin Echo of HC-SR04
#define trigPin 3 //attach pin D3 Arduino to pin Trig of HC-SR04
// https://create.arduino.cc/projecthub/abdularbi17/ultrasonic-sensor-hc-sr04-with-arduino-tutorial-327ff6
// defines variables
long duration; // variable for the duration of sound wave travel
int distance; // variable for the distance measurement
// verbind de ultrasone sensor als volgt
// arduino >>> ultrasone sensor
// 5V >>> VCC
// D2 >>> ECHO
// D3 >>> TRIG
// GND >>> GND
int lichtSensor = 11;
//sluit de licht sensor aan op pin 11
int lichtSensorStatus;
int relaypin = 8;
// sluit de relay aan op digitale pin 8
void setup() {
lcd.init();
lcd.backlight();
// ultrasone sensor
pinMode(trigPin, OUTPUT); // Sets the trigPin as an OUTPUT
pinMode(echoPin, INPUT); // Sets the echoPin as an INPUT
Serial.begin(9600); // // Serial Communication is starting with 9600 of baudrate speed
Serial.println(“Ultrasonic Sensor HC-SR04 Test”); // print some text in Serial Monitor
Serial.println(“with Arduino UNO”);
Serial.println(“RickB.eu”);
pinMode(relaypin, OUTPUT);
pinMode(lichtSensor, INPUT);
}
void loop() {
lcd.setCursor(2, 0);
lcd.print(“Rick (RickB.nl)”);
lcd.setCursor(2, 2);
lcd.print(“relay status”);
lcd.setCursor(2, 1);
lcd.print(“Distance: “);
lcd.print(distance);
lcd.println(” cm”);
lcd.setCursor(2, 3);
// Clears the trigPin condition
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
// Sets the trigPin HIGH (ACTIVE) for 10 microseconds
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Reads the echoPin, returns the sound wave travel time in microseconds
duration = pulseIn(echoPin, HIGH);
// Calculating the distance
distance = duration * 0.034 / 2; // Speed of sound wave divided by 2 (go and back)
// Displays the distance on the Serial Monitor
Serial.print(“Distance: “); // de afstant is in cm
Serial.print(distance);
Serial.println(” cm”);
lichtSensorStatus=analogRead(lichtSensor);
Serial.println(lichtSensorStatus);
if (distance < 30 & lichtSensorStatus <=100){
lcd.print(“relay aan”);
digitalWrite(relaypin, HIGH);
delay(1000);
Serial.print(“relay aan”);
lcd.setCursor(2, 2);
lcd.print(” “);
}
else {
lcd.print(“relay uit”);
digitalWrite(relaypin, LOW);
delay(1000);
Serial.print(“relay uit”);
lcd.setCursor(2, 2);
lcd.print(” “);
}
//projeckt Rickb.eu
}