my bluetooth reception is a non stop loop

Hello,

I have a JDY-09 module, an rgb led banner, a relay and an arduino UNO card. my project is to control the colors of the led + a relay by bluetooth from my smartphone. Here is my code:

char color=0; //store the received byte here

//define the RGB pind
int pc=7;
int red = 3;
int green = 5;
int blue = 9;
int pc_state = 0;
int Received=0;
char received;

void setup() {
Serial.begin(9600); //Start the serial comunication for the bluetooth module
pinMode(red, OUTPUT); //Red color pwm pin defined as output
pinMode(green, OUTPUT); //Green color pwm pin defined as output
pinMode(blue, OUTPUT); //Blue color pwm pin defined as output
pinMode(pc,OUTPUT);
//Give first value of the PWM 0, we start with the RGB LEDs off
analogWrite(red,255);
analogWrite(green,255);
analogWrite(blue,255);

}

void loop() {

if(Serial.available()>0){
// read the bluetoot data and store it
color = Serial.read();
char Rec = char(color);
if (Rec !=‘0’)
{
Serial.println(Rec); //This is to visualise the received character on the serial monitor
}
}

/////////////////RELAY////////////////////////////////////////////////////////////////////
if (pc_state == 0 && Received ==‘a’)
{
digitalWrite(pc,HIGH);
pc_state=1;
Received=0;
}
if (pc_state ==1 && Received ==‘a’)
{
digitalWrite(pc,LOW);
pc_state=0;
Received=0;
}
//////////////////////////////

//////////////////////////////

//LEDs off
if (color ==‘n’)
{
analogWrite(red,255);
analogWrite(green,255);
analogWrite(blue,255);
}
//White
if (color ==‘w’)
{
analogWrite(red,0);
analogWrite(green,0);
analogWrite(blue,0);
}
//Red
if (color ==‘r’)
{
analogWrite(red,0);
analogWrite(green,255);
analogWrite(blue,255);
}
//Green
if (color ==‘g’)
{
analogWrite(red,255);
analogWrite(green,0);
analogWrite(blue,255);
}
//Blue
if (color ==‘b’)
{
analogWrite(red,255);
analogWrite(green,255);
analogWrite(blue,0);
}
//Orange
if (color ==‘o’)
{
analogWrite(red,0);
analogWrite(green,98);
analogWrite(blue,255);
}
//Violet
if (color ==‘v’)
{
analogWrite(red,148);
analogWrite(green,255);
analogWrite(blue,107);
}
//Cyan
if (color ==‘c’)
{
analogWrite(red,255);
analogWrite(green,0);
analogWrite(blue,0);
}
//Yellow
if (color ==‘y’)
{
analogWrite(red,0);
analogWrite(green,51);
analogWrite(blue,255);
}

if (color ==‘p’)
{
analogWrite(red,0);
analogWrite(green,255);
analogWrite(blue,20);
}
}

However, my program was working for a while but now at the very moment I send any information to my Bluetooth module, the serial port shows me that it receives these unknown characters very quickly:"⸮" + letters that have nothing to do with it and that makes my program completely buggy. Not finding answers on the internet and being a complete beginner on arduino I allow myself to ask you for your help, I have been struggling on this for more than 2 weeks HELP ME PLEASE
thank you in advance,
:slight_smile: