Arduino Photoresistor - arduino

Question

I'm trying to make an Arduino project where I need the value of light to determine when a song play's on the mp3 module. I'm trying to loop through the value's of being sent to the photoresistor, but I'm only receiving 1 number, how can I get a continuous loop of values/data?
#include "Arduino.h"
#include "SoftwareSerial.h"
#include "DFRobotDFPlayerMini.h"
SoftwareSerial mySoftwareSerial(10, 11); // RX, TX
DFRobotDFPlayerMini myDFPlayer;
void printDetail(uint8_t type, int value);
void photoLoop() {
Serial.begin(2400);
pinMode(lrdPin, INPUT);
int ldrStatus = analogRead(ldrPin);
Serial.println(ldrStatus);
}
void setup() {
mySoftwareSerial.begin(9600);
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);
} else {
photoLoop();
}
myDFPlayer.volume(30); //Set volume value. From 0 to 30
myDFPlayer.play(3); //Play the first mp3
}
void loop() {
while (!Serial.available()); //wait until a byte was received
analogWrite(9, Serial.read());//output received byte
static unsigned long timer = millis();
if (millis() - timer > 3000) {
timer = millis();
//myDFPlayer.next(); //Play next mp3 every 3 second.
}
// if (myDFPlayer.available()) {
// printDetail(myDFPlayer.readType(), myDFPlayer.read()); //Print the detail message from DFPlayer to handle different errors and states.
// }
}

Answer 1

you are not reading the value from photo resistor in loop function.
you only read the value once
int ldrStatus = analogRead(ldrPin);
That too in setup. so you are only receiving one number.
Why did you use two Serial.begin() statements - 115200 and 2400 ?
Try this
#include "Arduino.h"
#include "SoftwareSerial.h"
#include "DFRobotDFPlayerMini.h"
SoftwareSerial mySoftwareSerial(10, 11); // RX, TX
DFRobotDFPlayerMini myDFPlayer;
void printDetail(uint8_t type, int value);
void photoLoop() {
// Serial.begin(2400); // YOU DONT NEED THIS
pinMode(lrdPin, INPUT);
int ldrStatus = analogRead(ldrPin);
Serial.println(ldrStatus);
}
void setup() {
mySoftwareSerial.begin(9600);
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);
}
else {
photoLoop();
}
myDFPlayer.volume(30); //Set volume value. From 0 to 30
myDFPlayer.play(3); //Play the first mp3
}
void loop() {
//CALL photoLoop in LOOP
photoLoop()
while (!Serial.available()); //wait until a byte was received
analogWrite(9, Serial.read());//output received byte
static unsigned long timer = millis();
if (millis() - timer > 3000) {
timer = millis();
//myDFPlayer.next(); //Play next mp3 every 3 second.
}
// if (myDFPlayer.available()) {
// printDetail(myDFPlayer.readType(), myDFPlayer.read()); //Print the detail message from DFPlayer to handle different errors and states.
// }
}