Serial Communication MATLAB (Simulink) and Arduino (English)

This video explains how to establish a serial communication between Arduino and Simulink in MATLAB.

[nomannosher]

union BtoF
{
byte b[16];
float fval;
} u;

const int buffer_size = 16;
byte buf[buffer_size];
float myVal;
void setup()
{
Serial.begin(115200, SERIAL_8N1);


}

void loop() {
// put your main code here, to run repeatedly:
if (Serial.available() > 0)
{
myVal = readFromMatlab();
delay(0.1);
writeToMatlab(myVal+5);

}
}

float readFromMatlab()
{
int reln = Serial.readBytesUntil("\r\n", buf, buffer_size);
for (int i=0; i<buffer_size; i++)
{
u.b[i] = buf[i];
}
float output = u.fval;
return output;
}

void writeToMatlab (float number)
{
byte *b = (byte *) &number;
Serial.write(b, 4);
Serial.write(13);
Serial.write(10);
}

[osamaahmad]

There is a considerable delay between the sent and received number. What might be the cause for this delay? Is it possible to utilize this technique (after some tweaking for optimization) for real time hardware in loop applications?

[montrypunt]

Hello, how do I receive multiple data from Arduino -> Simulink and display these values?

[ashalraheem]

this is a lot better than hardware support package for arduino and esp

[poovarasanganesan]

hi can you please share the Arduino code in the description as well?

[EricBasset]

Hello Ismaeil, I have a error when I write your program and I don't know why. Have you got an idea ?
I write this : int reln = Serial.readBytesUntil("\r\n", buf, buffer_size);
The error is this : no matching function for call to 'readBytesUntil(const char [3], byte&, const int&)'

[rramirezx]

Excelente Video Ismaiel Ahmed, muy buena explicación y espero mas videos de Arduino Simulink, saludos.

[marvinwright_]

Thank you for uploading this video, I get an error for int reln = Serial.readBytesUntil("\r\n", buf, buffer_size);

"exit status 1

invalid conversion from 'const char*' to 'char' [-fpermissive]"

Do you have any advice? Many thanks

[notaplant]

Using this communication method does not require the Arduino support package, right ?

[TheEduardoafd]

Excelent video, thank you! It worked fine for me but wheneve i run it using the Scope as a sink i get a varying value between the expected value and 0, which i expect is the value considered by Simulink when no communication occurs, is there a way to filter those values?

[AbdullahAAlwan]

Hello. I have PV system connected with grid real solar panel I was Simulink to get maximum power point tracking MMPT by using Grey wolf algorithm. I want use the algorithm in arduino in order to injected it in MMPT to get maximum power.
Can you help me how to convert the algorithm to Arduino code?

[arabiccoderscamp]

hello sir, sir please tell me can i use matlab and arduino simulator without having a physical arduino card

[pouryarashidi]

Hi
how can i add this block in my R2020b matlab?

[rabbitonthemoon]

I use "auto(VariableStepDiscrete)" same as you but it return error "The block 'Serial Send' cannot be assigned a continuous sample time"
When I try to fix-step it not error but recieve data not update. How to solve?