What are the commands to run and rotate a servo and what pins can I use for it?
Servo test code. Have you read the servo information on the main arduino site?
// zoomkat 12-25-13 serial servo test
// type servo position 0 to 180 in serial monitor
// or for writeMicroseconds, use a value like 1500
// Send an a to attach servo or d to detach servo
// for IDE 1.0.5 and later
// Powering a servo from the arduino usually *DOES NOT WORK*.
#include <Servo.h>
String readString; //String captured from serial port
Servo myservo; // create servo object to control a servo
int n; //value to write to servo
void setup() {
Serial.begin(9600);
myservo.writeMicroseconds(1500); //set initial servo position if desired
myservo.attach(7, 500, 2500); //the pin for the servo control, and range if desired
Serial.println("servo all-in-one test code 12-25-13"); // so I can keep track of what is loaded
Serial.println();
}
void loop() {
while (Serial.available()) {
char c = Serial.read(); //gets one byte from serial buffer
readString += c; //makes the string readString
delay(2); //slow looping to allow buffer to fill with next character
}
if (readString.length() >0) {
Serial.println(readString); //so you can see the captured string
// attach or detach servo if desired
if (readString == "d") {
while (digitalRead(7)) {} //delay loop until pin 7 is low
myservo.detach(); //detach servo
Serial.println("servo detached");
goto bailout; //jump over writing to servo
}
if (readString == "a") {
myservo.attach(7); //reattach servo to pin 7
Serial.println("servo attached");
goto bailout;
}
n = readString.toInt(); //convert readString into a number
// auto select appropriate value
if(n >= 500)
{
Serial.print("writing Microseconds: ");
Serial.println(n);
myservo.writeMicroseconds(n);
}
else
{
Serial.print("writing Angle: ");
Serial.println(n);
myservo.write(n);
}
bailout: //reenter code loop
Serial.print("Last servo command position: ");
Serial.println(myservo.read());
Serial.println();
readString=""; //empty for next input
}
}
The commands: Servo - Arduino Reference
That page also covers how many servos you can run (12 on an UNO) and what pins you can use (any digital I/O pins).
You will need to provide roughly 1 Amp of 4-6V DC power per servo. This is more than you can get from the +5V pin of an Arduino UNO so expect to use a separate power source for the servos.
can a servo rotate 360°
Hi,
I think before we go any further.
What is your electronics, programming, arduino, hardware experience?
What do you want to do with the servo, and with what controller?
Tom...... 
Well, look what Google gives me! https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=360+degree+servo&tbm=shop
Isaac96:
Well, look what Google gives me! https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=360+degree+servo&tbm=shop
Gives me "Server not found".
can a servo rotate 360°
Sail winch servos can rotate more than the typical 180 deg. of the standard RC servos. A "360 deg. servo" usually refers to a servo modified for continuous rotation and which cannot be commanded to a specific position.
johnwasser:
expect to use a separate power source for the servos.
Connected as shown attached.....
johnwasser:
you can use (any digital I/O pins).
Which includes the analog pins used as digital pins... I tested that a while ago.
Hi,
JimboZA you have tarted up your servo diagram. (its lost all its character)
Tom.....
TomGeorge:
Hi,
JimboZA you have tarted up your servo diagram. (its lost all its character)Tom.....
Ah crap, that's actually an older one in Eagle, I normally post the ExpressSCH one...