Why serial plotter is looking like this? How to resolve?

[Walter Roberson]

Please post a link to matlab function you are using. Mathworks does not supply any serial plotter. There are a few serial plotters in the file exchange, but they do not look like that.

[Technical]

int analogPin = A3; 
int Rawval ;  // variable to store the value read
int Scaleval ;
int RELAY_pin = 10;    // Relay is connected to pin D10
void setup()
{
  Serial.begin(9600);           //  setup serial
  pinMode(RELAY_pin, OUTPUT);
}

void loop()
{
  int Rawval = analogRead(analogPin);
  Serial.print("Rawvalue from Analog input  =");
  Serial.print(Rawval);
  // For 3V3 input to read 100%, 3V3 of 5V ref 
  // = (3.3 / 5) * 1023 = 675
  Scaleval = map(Rawval, 0, 675, 0, 20);
  Serial.print("   Scaled Value =");
  Serial.println(Scaleval);

[Technical]

How to visualize the data using this code?

[Walter Roberson]

That is not matlab code and does not do any plotting. You asked about a specific serial data plotting routine, but to answer that question we need to know which MATLAB-based plotting routine you are using.

Answer 1

[Walter Roberson]

After you have created a serialport object and configured it appropriate,

s = readline(PORT);
values = sscanf(S, 'Rawvalue from Analog input  =%f   Scaled Value =%f');
rawvalue = values(1);
scaledvalue = values(2);

After that you could plot the appropriate value, such as by using animatedline and addpoints