Serial.available() problem

[bardoge]

hi as you can see in the code i am trying to print a text in the serial monitor which is "b1/2e" but when try another text which is "c1/2e" i notice a space printed before "c" .
void loop() {
NOTE:i will be reseted to 0 every loop
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if ( Serial.available()!=0)
{
str=Serial.read();
Serial.println(str);
my_data[i]=str;
i++;
if(str=='e')
{
l=1;
}
// Nombre de points
else if(str=='/')
{
coordonnees[i-1]=str;
nbr_slash++;
// Serial.println(nbr_slash);
}
// transformation en decimal
else if(str=='b'){}
else { coordonnees[i-1]=str-'0';}
}
}
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then i tried to check the return of Serial.available() of each individual character
as you can see here even if nothing is going on serial input still Serial.available() returns 1
actually the Serial.available who is causing the space to appear because the array will be shifted by 1 any help why is this happening?
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void loop() {
if ( Serial.available() >0 )
{
Serial.print(Serial.available());
str=Serial.read();
Serial.println(str);
my_data[i]=str;
i++;
if(str=='e')
{
l=1;
}
// Nombre de points
else if(str=='/')
{
coordonnees[i-1]=str;
nbr_slash++;
// Serial.println(nbr_slash);
}
// transformation en decimal
else if(str=='b'){}
else { coordonnees[i-1]=str-'0';}
}
}
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[pmagowan]

Use the edit function to put your code in code tags <|>. Read the post on how to get the most out of this forum which Is the top of every section

[DrDiettrich]

@bardoge

a space printed before "c"

Or a space or newline printed after the "e"?
Do you terminate each input by "Enter"?

[bardoge]

no i entered the full text at once

[b707]

it is not a answer for question "Do you terminate your input by "Enter"?"

[johnwasser]

It works fine for me when I set the Serial Monitor line ending to "No line ending":

b
1
/
2
e
c
1
/
2
e

I had to guess at the variables you didn't declare but it compiles without warnings:

char str;
char my_data[80];
int i = 0;
int nbr_slash = 0;

int l;
int coordonnees[80];

void setup()
{
  Serial.begin(115200);
  delay(200);
}

void loop()
{
  if (Serial.available() != 0)
  {
    str = Serial.read();
    Serial.println(str);
    my_data[i] = str;
    i++;
    if (str == 'e')
    {
      l = 1;
    }
    // Nombre de points
    else if (str == '/')
    {
      coordonnees[i - 1] = str;
      nbr_slash++;
      // Serial.println(nbr_slash);
    }
    // transformation en decimal
    else if (str == 'b')
    {
    }
    else
    {
      coordonnees[i - 1] = str - '0';
    }
  }
}

[bardoge]

when i write "b1/2e" press enter then write "c1/2e"

[UKHeliBob]

Is the extra character on the end of the first entry or the start of the second entry ?

Print ">" before each character and "<" after it and you will be able to tell

What is Line ending set to in the Serial monitor ?

[bardoge]

it works i was setting up the line ending on New line i change it to No line ending .thanks

[bardoge]

thank you all guys for your help