Arduino sketch to test servos or brushless motor controllers

ppm_serial.ino

/* Sweep
 by BARRAGAN <http://barraganstudio.com>
 This example code is in the public domain.

 modified 8 Nov 2013
 by Scott Fitzgerald
 http://www.arduino.cc/en/Tutorial/Sweep
*/

#include <Servo.h>

Servo myservo;  // create servo object to control a servo
// twelve servo objects can be created on most boards

int pos = 0;    // variable to store the servo position

// 12 is the maximum length of a decimal representation of a 32-bit integer,
// including space for a leading minus sign and terminating null byte
byte intBuffer[12];
String intData = "";
int delimiter = (int) '\n';

void setup() {
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object
  Serial.begin(9600);
  Serial.println("Hello");
}

void loop() {
  while (Serial.available()) {
    int ch = Serial.read();
    Serial.println(ch);
    if (ch == -1) {
        // Handle error
    }
    else if (ch == delimiter) {
      // Copy read data into a char array for use by atoi
      // Include room for the null terminator
      int intLength = intData.length() + 1;
      intData.toCharArray(intBuffer, intLength);
  
      // Reinitialize intData for use next time around the loop
      intData = "";
  
      // Convert ASCII-encoded integer to an int
      pos = atoi(intBuffer);
      Serial.print("Got: ");
      Serial.println(pos);
      break;
    }
    else {
      intData += (char) ch;
    }
  }


    myservo.writeMicroseconds(pos);
}