All pins reserved by Arduino servo

clc
clear

triggerPin = 'D2';
echoPin = 'D3';
servoPin = 'D4';
port = 'COM5';
board = 'Nano3';
ledWhite = 'D9';
ledGreen = 'D10';
ledRed = 'D11';
k = 1;



a = arduino(port,board,'Libraries',{'Servo','Ultrasonic'});

configurePin(a,servoPin,'DigitalOutput')
configurePin(a,ledWhite,'DigitalOutput')
configurePin(a,ledRed,'DigitalOutput')
configurePin(a,servoPin,'Servo')

s = servo(a, servoPin, 'MinPulseDuration', 700*10^-6, 'MaxPulseDuration', 2300*10^-6);

Hello everyone,

In the above code snippet, I cannot run all the LED pins because they are all reserved by servo. I have tried configure pin method but this does not work. Could someone please help? Am running MATLAB 2021b.

Error:

"Nano3 Pin D9 is reserved by Servo. To release the resource, clear all variables holding onto this resource."

(Same error for all three pins)

[Walter Roberson]

https://www.arduino.cc/reference/en/libraries/servo/ says that pins 9 and 10 are reserved, except 11 and 12 instead for Mega

[William Zhang]

Thank you very much! For those students that are wondering by this post in the future, here's all I did:

[Notice how all these pins are repositioned appropriately this time]::

triggerPin = 'D2';
echoPin = 'D3';
servoPin = 'D9';
port = 'COM5';
board = 'Nano3';
ledWhite = 'D5';
ledGreen = 'D6';
ledRed = 'D11';

Answer 1

[William Zhang]

Heyo everyone, the issue has been resolved thanks to the amazing commentor, Walter Roberson (see comment section).

Here the pins are made new and appropriate to correct pins, where only 9 and 10 are used by servo::

triggerPin = 'D2';
echoPin = 'D3';
servoPin = 'D9';
port = 'COM5';
board = 'Nano3';
ledWhite = 'D5';
ledGreen = 'D6';
ledRed = 'D11';