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calibrate example for Servo #49
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bb23457
callibrate example for Servo
noob-master147 6001753
calibrate example for servo
noob-master147 4b31d2e
changes requested
noob-master147 a928daa
bug fix for serial monitor
noob-master147 e69088d
Auto Format implement
noob-master147 8819502
bug fix for both Newline and carriage return
noob-master147 be98aac
suggestions considered
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Original file line number | Diff line number | Diff line change |
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/* Calibrate | ||
This code allows you to calibrate your servo motor using the serial monitor | ||
Enter the angle in the serial monitor | ||
by Divyansh Khandelwal <github.com/noob-master147> | ||
This example code is in the public domain. | ||
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modified 24th March 2020 | ||
by Divyansh Khandelwal | ||
*/ | ||
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#include <Servo.h> | ||
Servo myservo; // create servo object to control a servo | ||
int input; // variable to read the value from the Serial Monitor | ||
int servoPin = 11; // the Arduino pin the servo is attached to | ||
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void setup() { | ||
myservo.attach(servoPin); // attaches the servo on servoPin to the servo object | ||
Serial.begin(9600); | ||
Serial.println("Enter The Angle from 0 to 180"); | ||
} | ||
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void loop() { | ||
if (Serial.available() > 0) { | ||
input = Serial.parseInt(); // reads the value from Serial | ||
delay(25); | ||
while (Serial.available()) { // remove the line endings | ||
Serial.read(); | ||
} | ||
myservo.write(input); // sets the servo position | ||
delay (25); | ||
Serial.print("Servo set to "); | ||
Serial.print(input); | ||
Serial.println(" degree"); | ||
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} | ||
} |
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With the line ending menu of Serial Monitor set to anything other than "No line ending", there is an issue. For example, if I enter 42 in the Serial Monitor input field, I get this output:
"Newline" is the default setting of this menu, so it's likely many users will encounter this problem.
The easiest solution would be to document the required line ending setting. Of course, many users won't read the directions, so they will still have the problem.
There is also the issue of the 1 s delay before the input takes effect. Not a huge issue, but it doesn't provide a very responsive feeling to the interface.
I explained the cause and described the fix for these issues here: #44 (comment)
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ok ill look into your suggestions
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@per1234 should I mention in the document to use no line ending or should I try improvising code to work for newline?
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The issue still occurs with the line ending menu set to "Both NL & CR".DONEThe reason is because serial communication is relatively slow.
Serial.parseInt()
returns as soon as it encounters a non-digit. So whenSerial.parseInt()
returns the NL has already been received, but the CR has not. The "remove the line endings" code you added removes the NL, thenSerial.available()
returns 0 so thewhile
loop exits. On the next time through theloop
function the CR is in the receive buffer, soSerial.parseInt()
returns 0 (because that's what it does when it doesn't encounter any digits).The solution is to add a short delay before the "remove the line endings" code to allow the CR to be received, as I demonstrated in #44 (comment).