Comments on: Arduino Serial Servo Control

By: lawrence

lawrence — Fri, 12 Feb 2010 09:32:14 +0000

i opened the serial monitor of arduino and i pressed the arrow keys and spacebar.it is not response at all….wht happen to my arduino?what i need to build this are only the arduino platform and the whole setup right?? am i missing sths ??sths i need to build this but i didnt know…thanks :)

By: Khalid Khattak

Khalid Khattak — Fri, 11 Dec 2009 12:24:18 +0000

Can You help me in this topic at arduino forum http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1260432183

By: Andrew Rosenblum

Andrew Rosenblum — Fri, 24 Oct 2008 01:48:04 +0000

This was way cool!

I used the servo motor in the article with an Arduino starter kit from AdaFruit.com. I was surprised how easy it was to get it all working.

I was thinking of making a bot with wheels (stepper motor, not really sure how servos fit in) and IR sensor. The software would avoid objects and make some kind of map. It would be nice to connect wirelessly, too.

By: Brian

Brian — Sat, 15 Dec 2007 02:30:13 +0000

Here's another cool little Python script I came up with that's a little more interesting to watch than the previous one. Hopefully it's well-documented enough to let you figure out what it does. Try it out!!

#!/usr/bin/env python

#
# Hello Arduino!
# serial-servo-roxxor.py
# to be used with Arduino NewSerialServo sketch
#

import serial
import time

# open usb serial connection to arduino
ser = serial.Serial('/dev/ttyUSB0', 9600)
print "\nUSB serial port open: ", ser.portstr

# center the servo to start
ser.write(" ")
print "Centering...\n"
time.sleep(1)

# compute total length of sequence, in seconds
sec = 0

# perform 9 iterations, 10deg increments
i = 9
while i >= 1:

    units = i + 1    # units to pulse servo
    deg   = i * 10   # degrees moved L/R of center
    wait  = i * 0.1  # variable wait time - large deflections need more time

    print "Left", deg, "deg"
    for x in range(1,units):
        # move servo x units counterclock
        ser.write(",")
    # wait
    time.sleep(wait)
    #increment time counter
    sec += wait

    # center servo and wait
    ser.write(" ")
    print "Center"
    time.sleep(wait)
    #increment time counter
    sec += wait

    print "Right", deg, "deg"
    for x in range(1,units):
        # move servo x units clockwise
        ser.write(".")
    # wait
    time.sleep(wait)
    #increment time counter
    sec += wait

    # center servo and wait
    ser.write(" ")
    print "Center\n"
    time.sleep(wait)
    #increment time counter
    sec += wait

    i -= 1

# close the connection
ser.close()
print "\nPort closed.  Sequence complete in", sec, "seconds.\n"

By: Brian

Brian — Wed, 12 Dec 2007 01:36:42 +0000

Some exciting new developments are happening here. After reading Tinkerlog's super-cool "Arduino XMAS Hitcounter," I knew I had to learn how to get Python to talk to Arduino. As it turns out, Python's pySerial module is not part of the standard library, so I had to get it from Sourceforge. Installation was a one-command affair.

My Python "Hello Arduino" is reproduced below, and it's designed to provide the ASCII characters expected by the Arduino sketch NewSerialServo, printed above. WHERE can I go from HERE?!?!

#!/usr/bin/env python

#
# Hello Arduino!
# serial-servo.py
# to be used with Arduino NewSerialServo sketch
#

import serial
import time

# open usb serial connection to arduino
ser = serial.Serial('/dev/ttyUSB0', 9600)
print "USB port: ", ser.portstr

i = 5

while i > 0:
    # center servo and wait 1 sec
    ser.write(" ")
    print "Center"
    time.sleep(1)
    # move servo 90deg counterclock, wait
    ser.write(",,,,,,,,,")
    print "90 L"
    time.sleep(1)
    # center servo and wait 1 sec
    ser.write(" ")
    print "Center"
    time.sleep(1)
    # move servo 90deg clockwise, wait
    ser.write(".........")
    print "90 R"
    time.sleep(1)
    i = i - 1

# close the connection
ser.close()
print "Sequence complete."