I am attempting to control servos using the Maestro Servo Controller (https://www.pololu.com/product/1350), with Python run on a raspberry pi. However I am getting an error when I run the script below.
- Script :
import maestro
servo = maestro.Controller()
servo.setAccel(0,4) #set servo 0 acceleration to 4
servo.setTarget(0,6000) #set servo to move to center position
servo.close
- Error :
File "test1.py", line 3, in <module>
servo = maestro.Controller()
File "/home/pi/Maestro/maestro.py", line 33, in _init_
self.usb = serial.Serial(ttyStr)
File "/home/pi/.local/lib/python2.7/site-packages/serial/serialutil.py", line 240, in _init_
self.open()
File "/home/pi/.local/lib/python2.7/site-packages/serial/serialposix.py", line 268, in open
raise SerialException(msg.errno, "could not open port {}: {}".format(self._port, msg))
serial.serialutil.SerialException: [Errno 2] could not open port /dev/ttyACM0: [Errno 2] No such file or directory: '/dev/ttyACM0'
Here are the details of my setup and what I have done
3) I have followed tutorial : https://www.youtube.com/watch?v=6EGSsxPzXO0&t=864s
4) Using Raspberry pi 3 B
5) Micro Maestro 6-Channel USB Servo Controller
6) Python 2.7.13
7) Installed pyserial
8) I have disabled the serial login shell & the serial interface has been enabled (as is shown here : https://youtu.be/6EGSsxPzXO0?t=11m56s)
9) I have run “dmesg | grep tty” command with the following response :
[ 0.001207] console [tty1] enabled
[ 1.067317] 3f201000.serial: ttyAMA0 at MMIO 0x3f201000 (irq = 87, base_baud = 0) is a PL011 rev2
Any suggestions on a fix would be appreciated.
Let me know if any additional information is required.
Cheers
Steve
