Final Project Journal

I programmed each single object alone. at first, I programmed the soil moisture sensor to read the serial monitor to choose the appropriate read to put it as a limit in the code.

the second was to programme the ultrasonic to measure the water level and also know the range of reading.
then I integrate between the codes as following:

1- upon the reading of soil moisture if it is above 400 so, turn on the pump else, turn it off

2- according to the read of the ultra sonic sensor if the distance is larger than 10 cm then turn off the pump and turn on the mp3 module ( which I've added its code it to the library) . if not? follow the previous step.


#include "DFRobotDFPlayerMini.h"

#include "SoftwareSerial.h"

int sensorPin = A0;

int sensorValue;

int limit = 400;

#define echoPin 2

#define trigPin 3

long duration;

int distance;

SoftwareSerial mySoftwareSerial(0, 1); // RX, TX

DFRobotDFPlayerMini myDFPlayer;

void setup() {

pinMode(sensorPin, INPUT);

Serial.begin(9600);

pinMode(8, OUTPUT);

pinMode(trigPin, OUTPUT);

pinMode(echoPin, INPUT);

Serial.println("Ultrasonic Sensor HC-SR04 Test");

Serial.println("with Arduino UNO R3");

Serial.begin(115200);

Serial.println();

Serial.println(F("DFRobot DFPlayer Mini Demo"));

Serial.println(F("Initializing DFPlayer ... (May take 3~5 seconds)"));

if (!myDFPlayer.begin(mySoftwareSerial)) { //Use softwareSerial to communicate with mp3.

Serial.println(F("Unable to begin:"));

Serial.println(F("1.Please recheck the connection!"));

Serial.println(F("2.Please insert the SD card!"));

while (true);

}

Serial.println(F("DFPlayer Mini online."));

myDFPlayer.volume(25);

}

void loop() {

digitalWrite(trigPin, LOW);

delayMicroseconds(2);

digitalWrite(trigPin, HIGH);

delayMicroseconds(10);

digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin, HIGH);

distance = duration * 0.034 / 2;

Serial.print("Distance: ");

Serial.print(distance);

Serial.println(" cm");

sensorValue = analogRead(sensorPin);

Serial.print("Analog Value : ");

Serial.println(sensorValue);

if (distance <= 5) {

if (sensorValue < limit) {

digitalWrite(8, LOW);

}

else {

digitalWrite(8, HIGH);

}

}

else {

digitalWrite(8, LOW);

myDFPlayer.play(1); //Play the first mp3

delay(2000);

myDFPlayer.pause(); //pause the mp3

}

}

• I got stuck after cutting the enclosure parts as I did not cancel the overlapping of the parts so, the things that I wanted to have it engraved, got cut. don't repeat my mistakes you should check the overlapping before cutting :"D
  I also made some modifications on the design.

• I also got stuck when it comes to code the MP3 module. I've searched and asked for help.