See if this helps:

const int analogInPin = A0; //LDR PIN const int digitalOutPin = 13; // LED PIN int outputValue;

int sensorValue = 0; //

byte Buton1; //LDR button byte Buton2; //Blutooth button

void setup() { Serial.begin(9600); }

void loop() { while (Serial.available() > 0) { char inChar = Serial.read(); if (inChar == 'l' || inChar == 'L') { Buton1 = Serial.parseInt(); Buton1 = constrain(Buton1,0,1); }
else if (inChar == 'b' || inChar == 'B') { Buton2 = Serial.parseInt(); Buton2 = constrain(Buton2,0,1); }
else { Serial.println("invalid input"); while (Serial.available() > 0) Serial.read(); } Serial.print("Buton1 = "); Serial.println(Buton1); Serial.print("Buton2 = "); Serial.println(Buton2); Serial.println();
} }

See if this helps:

const int analogInPin = A0; //LDR PIN
const int digitalOutPin = 13; // LED PIN
int outputValue;

int sensorValue = 0; //

byte Buton1; //LDR button
byte Buton2; //Blutooth button


void setup() {
  Serial.begin(9600);
}

void loop() {
  while (Serial.available() > 0) {
    char inChar = Serial.read();
    if (inChar == 'l' || inChar == 'L')
    {
      Buton1 = Serial.parseInt();
      Buton1 = constrain(Buton1,0,1);
    }  
    else if (inChar == 'b' || inChar == 'B')
    {
      Buton2 = Serial.parseInt();
      Buton2 = constrain(Buton2,0,1);
    }  
    else
    {
      Serial.println("invalid input");
      while (Serial.available() > 0)
        Serial.read();
    }
    Serial.print("Buton1 = ");
    Serial.println(Buton1);
    Serial.print("Buton2 = ");
    Serial.println(Buton2);
    Serial.println();    
  }
}