I have no idea why this is happening but I'll try to explain it as best I can, also sorry if this is a question that's been asked before, I looked around but couldn't really find anything related to what my issue is.
Essentially, I have a simple python program that is supposed to control a servo motor. I'm using pyfirmata for this. Whenever I try to move the servo, though, I get the error serial.serialutil.SerialException: WriteFile failed (PermissionError(13, 'Access is denied.', None, 5)). I've had this is in the past and known its been an issue where the port is already in use, however unplugging the servo motor immediately gets rid of this error. I also hear the windows USB disconnect sound, but I'm not sure if that's relevant.
In short, I get a permission error when my servo motor is plugged in and connected, but if I remove the wire at the D6 pin or remove the VCC pin from the servo motor I get no error. Any thoughts on what's causing this?
This is some example code I tried that still resulted in the error. I've also already tried using a different servo with no luck.
import time
from pyfirmata import Arduino, SERVO
PORT = "COM10"
servoPin = 6
try:
board = Arduino(PORT)
except:
print("Arduino board not plugged in! (Or not accessible on specified port)")
time.sleep(5)
quit()
board.digital[servoPin].mode = SERVO
for i in range (0, 180, 8):
board.digital[servoPin].write(i)
time.sleep(0.1)
Ok, got it working, this is still so weird.
I just bought and tried a different Arduino Nano and everything worked perfectly for whatever reason. The original Nano still works perfectly as long as its not being used with a servo? I have no clue why.
Anyways, if you have this issue, just switch out your Arduino board and everything should work.