unable to receive data in arduino from matlab

I have tried to send integer from matlab to arduino

my matlab code is

clc;
clear all;
close all;
s=serial('COM4','BAUDRATE',9600);
fopen(s);
fprintf(s,'%i',1);
fclose(s);

and my arduino code is

void setup()
{
    Serial.begin(9600);
    }
void loop()
{
    if(Serial.available()>0)
    {
        int b=Serial.read();
        if(v==1)
        {
            Serial.println(v);
            }
        else
            {
                Serial.println(v);
                }
        }
    
    }
   

After uploading it to arduino uno and clicking on serial monitor i am not getting any output. its just blank

Is there any mistake in my code or my connectivity process??

[Walter Roberson]

Your arduino code does not define the v that it tests and prints.

Also what is the difference between the two branches, if v is 1 or not?

[Sravani Vanama]

sorry its int v not b....

and i have just tried this code to check whether my arduino is receiving any data or not

But always Serial.available()=0

My arduino is not able to receive any data

[Walter Roberson]

You are sending '1' and a line terminator. You are reading a byte at a time. The byte corresponding to '1' has numeric value 49. The line terminator is byte value 10 or 13.

[Sravani Vanama]

I am new to matlab. I am not able to understand what u have said.

Can you please tell me lines where code should be modified clearly??

I have even tried this way......then i am getting 'none' printed infinite times in serial monitor

void setup()
{
    Serial.begin(9600);
    }
void loop()
{
    if(Serial.available()>0)
    {
        int v=Serial.read();
        Serial.println(v);
        }
    else
        
    Serial.println("none")
    }

which means Serail.available() is not greater than 0.

[Walter Roberson]

s=serial('COM4','BAUDRATE',9600);
fopen(s);
fwrite(s, uint8(1));
fclose(s);