YT-260 Pan/Tilt hack

arduino_pan_tilt.ino

const byte numChars = 32;
char receivedChars[numChars];   // an array to store the received data

boolean newData = false;

int dataNumber = 0;             // new for this version

void setup() {
    pinMode(5, OUTPUT);
    pinMode(4, OUTPUT);
    pinMode(0, OUTPUT);
    pinMode(2, OUTPUT);
    
    Serial.begin(115200);
    Serial.println("<Pan/Tilt Controller>");
    Serial.println("Ready!");
}

void loop() {
    recvWithEndMarker();
    showNewNumber();
}

void recvWithEndMarker() {
    static byte ndx = 0;
    char endMarker = '\n';
    char rc;
   
    if (Serial.available() > 0) {
        rc = Serial.read();

        if (rc != endMarker) {
            receivedChars[ndx] = rc;
            ndx++;
            if (ndx >= numChars) {
                ndx = numChars - 1;
            }
        }
        else {
            receivedChars[ndx] = '\0'; // terminate the string
            ndx = 0;
            newData = true;
        }
    }
}

void showNewNumber() {
    if (newData == true) {
        dataNumber = 0;
        dataNumber = atoi(receivedChars);   
        
        if (dataNumber == 1) {
          Serial.println("Received stop command");
          analogWrite(5, 0);
          analogWrite(4, 0);
          exit;       
        }
        else if (dataNumber == 2) {
          Serial.println("Received rotate left command");
          analogWrite(4, 1023);
          digitalWrite(2, LOW);
          delay(300);
          analogWrite(4, 0);
        }
        else if (dataNumber == 3) {
          Serial.println("Received rotate right command");
          analogWrite(4, 1023);
          digitalWrite(2, HIGH);
          delay(300);
          analogWrite(4,0);
        }
        else if (dataNumber == 4) {
          Serial.println("Received tilt back command");
          analogWrite(5, 1023);
          digitalWrite(0, HIGH);
          delay(300);
          analogWrite(5,0);
        }
        else if (dataNumber == 5) {
          Serial.println("Received tilt forward command");
          analogWrite(5, 1023);
          digitalWrite(0, LOW);
          delay(300);
          analogWrite(5,0);
        }
        newData = false;
    }
}

Yep, that's the way I would do it now. I found this one not long after fully committing to the hardware-hacking approach: https://hackaday.io/project/175096-hacking-yt-500-pan-tilt-head-radio-remote/details