Question Need help with Arduino code

hi, I’m using an Arduino Uno connected to a CNC shield to control my T3DL motor drivers with SIM tools controlling it, but I can’t get SIM tools to control the motors. I have verified that my wiring is correct by running a test script to turn the motors without SIM tools. so I’m pretty sure it’s an issue on the same tools. and through my research, I’m fairly certain it’s an issue with my code. but I also provided an image of the serial connection settings. I’m using.





// ----------------- Configuration -----------------

const int stepsPerRev = 1000; // microsteps per revolution



// Motor pins (X, Y, Z, A)

const int stepPins[4] = {2, 4, 6, 8}; // STEP pins

const int dirPins[4] = {3, 5, 7, 9}; // DIR pins



int lastPosition[4] = {0, 0, 0, 0}; // Remember last position for each motor



// -------------------- Setup ----------------------

void setup() {

Serial.begin(115200);



for (int i = 0; i < 4; i++) {

pinMode(stepPins, OUTPUT);

pinMode(dirPins, OUTPUT);

digitalWrite(stepPins, LOW);

digitalWrite(dirPins, LOW);

}



Serial.println("System Ready");

}

// -------------------- Main Loop ----------------------

void loop() {

if (Serial.available()) {

String input = Serial.readStringUntil('\n'); // Read full line

input.trim(); // Remove whitespace



if (input.length() == 0) return;



// Example input: 127,127,127,127

int values[4];

parseInput(input, values);



for (int i = 0; i < 4; i++) {

int targetStep = map(values, 0, 255, 0, stepsPerRev); // map to 0–1000

moveMotor(i, lastPosition, targetStep);

lastPosition = targetStep;

}

}

}



// ---------------- Parse Function -----------------

void parseInput(String input, int* values) {

int index = 0;

while (index < 4 && input.length() > 0) {

int commaIndex = input.indexOf(',');

if (commaIndex == -1) {

values[index] = input.toInt();

break;

}

values[index] = input.substring(0, commaIndex).toInt();

input = input.substring(commaIndex + 1);

index++;

}

}



// ---------------- Move Function ------------------

void moveMotor(int motor, int current, int target) {

int stepsToMove = abs(target - current);

bool direction = (target > current);



digitalWrite(dirPins[motor], direction);



for (int i = 0; i < stepsToMove; i++) {

digitalWrite(stepPins[motor], HIGH);

delayMicroseconds(100); // Adjust pulse width

digitalWrite(stepPins[motor], LOW);

delayMicroseconds(100); // Adjust frequency

}

}

It's a little hard to make out, but are those commas or periods in your 'Interface-Output' in the Simtools settings?

There commas