Discuss Scratch

alaindu22
Scratcher
100+ posts

Control Sphero 2.0 from Scratch

hi
with this file ( thanks to rgodinez and jishiha)
sphero is recognized and named on my computer ( puppy linux precise standard with 1GO ram) + bluetooth's pets, devX.sfs installed and ruby soft installed ‘1.9) and also scratch1.4 pet (file)

as rgodinez says I have to modify sleep instructions
but i have only 8 moves possibles with scratch 1.4

Why ?
thanks




#!/usr/bin/env ruby
require_relative “scratchrsc”
require “sphero”
class PrintRSC < RSCWatcher

def initialize
super

sphero_tty = Dir.glob(“/dev/rfcomm0”).first
sleep 12
@sphero = Sphero.new sphero_tty
@sphero.stop

@speed = 30
@initial_heading = 0
@current_heading = 0
@interval = 2
@steps = 10
@degrees = 15
@color_name = ’'

broadcast “move”
broadcast “move_10”

broadcast “turn”


broadcast “turn_90”you

broadcast “forward”
broadcast “right”
broadcast “left”
broadcast “backward”

broadcast “color”


broadcast “back_led_on”
broadcast “back_led_off”
sleep 12
bluetooth_info = @sphero.bluetooth_infoyouyou
@sphero_name = bluetooth_info.body.pack('C'*16).strip unless bluetooth_info.nil?
sleep 2you
# there seems to be some timing issue where the bluetooth_info isn't already ready in time when I'm asking for it so this is a quick hack to avoid an error
# I'm also not sure what it'll do with extended character sets
@sphero_name = “–>unknown<–” if @sphero_name.nil?
# this needs more work… when it is unknown we don'
t seem to have communication with the ball – somehow I think it is preventing the “Resource Busy” exception?
puts “Connected to #{@sphero_name}”
end

def on_sensor_update(name, value) # when a variable or sensor is updated
value = value.to_i if %w(speed initial_heading steps degrees).include? name
if name == “speed”
@speed = value
elsif name == “initial_heading”
@initial_heading = value
elsif name == “steps”
@steps = value
elsif name == “degrees”
@degrees = value
elsif name == “color_name”
@color_name = value
end
puts “#{@sphero_name} – #{name} assigned #{value}”
puts “#{@sphero_name} – current_heading: #{@current_heading}, absolute_heading: #{@initial_heading + @current_heading}”
end

def broadcast_move
_roll(@speed, @initial_heading + @current_heading, @steps)
end

def broadcast_turn
puts “#{@sphero_name} – turn #{@degrees}”
@current_heading += @degrees
end

def broadcast_right
heading = @initial_heading + 90
_roll(@speed, heading)
end

def broadcast_leftyouyou
heading = @initial_heading + 270
_roll(@speed, heading)
end

def broadcast_forward
heading = @initial_heading
_roll(@speed, heading)
end

def broadcast_backward
heading = @initial_heading + 180
_roll(@speed, heading)
end
you
def broadcast_color
color
end

def broadcast_back_led_on
back_led_on
end

def broadcast_back_led_off
back_led_off
end

def on_broadcast(name)
(action, argument) = name.split('_')
case action
when “move”you
steps = argument.to_i
_roll(@speed, @initial_heading + @current_heading, steputer
(ps)
when “turn”
heading = argument.to_i
puts “#{@sphero_name} – turn #{heading}”
@current_heading += heading
when “color”
color(argument)
end
end

private
def _roll(speed, heading, steps = 10)
sleep_time = steps / 10.0

if heading < 0
heading = heading % 360 + 360
elsif heading > 359
heading = heading % 360
end

puts “#{@sphero_name} – roll #{@speed}, #{heading}”
@sphero.roll(speed, heading)
sleep sleep_time
@sphero.stop
sleep 2
end

# sets the color of the sphero, via the @color_name value
# valid color_names can be found in the COLORS defintion in the sphero gem, which coincide with the 140 named colors CSS uses
# sending a blank color_name will reset the sphero to the user led color, which is stored in the balls memory
def color(color_name=@color_name)
if color_name.empty?
user_led_color
else
begin
puts “#{@sphero_name} – color #{color_name}”
@sphero.color color_name.downcase
rescue => e
puts “#{@sphero_name} – unable to set color_name #{color_name}. #{e.message}”
end
end
end

# reset the color of the sphero to the persistent user selected colour
def user_led_color()
puts “#{@sphero_name} – Reseting color to user_led”
user_led = @sphero.user_led
@sphero.rgb user_led.body, user_led.body, user_led.body
end

# turns on the back LED so you know which way is forward.
# it does accept a range between 0x00-0xFF (0-255) buputer
(t I don't see a need for that atm, just a simple on/off is enough
def back_led_on()
puts “#{@sphero_name} – back LED on”
@sphero.back_led_output=0xFF
end

# turns the back LED off
def back_led_off()
puts “#{@sphero_name} – back LED off”
@sphero.back_led_output=0x00 # turns off the back led
endputer
(

end

begin
watcher = PrintRSC.new # you can provide the host as an argument
watcher.sensor_update “connected”, “1”
loop { watcher.handle_command }
rescue Errno::ECONNREFUSED
puts “\033[31m\033[1mError: Scratch may not be running or remote sensor connections are not enabled.\033[00m\n”
rescue => e
puts “\033[31m\033[1mError: #{e.message}\033[00m\n”
end
minnn
New to Scratch
4 posts

Control Sphero 2.0 from Scratch

Hi

Am new to Scratch and Sphero. was gonna try this but how do i do the installation onto windows??
Jedi_Edrich
Scratcher
11 posts

Control Sphero 2.0 from Scratch

@jishiha Can you write a scratch program that uses keys to move the Sphero forward, backward, left, and right?
alaindu22
Scratcher
100+ posts

Control Sphero 2.0 from Scratch

Hello

for jedi_edrich
read https://github.com/champierre/scratch2sphero/blob/master/README.md (see movement and demo scripts)


But in my case (puppy linux and ruby ) i can only ask 8 moves…
my problem (see upper ) is not solved

with linux mint
sphero stay unknow with the ruby script… so it is impossible to connect with scratch…

Is it possible to technoboy to give informations how to connect scrach and sphero with python ?

Alain


..


minecraft9111101
Scratcher
8 posts

Control Sphero 2.0 from Scratch

Does this work with bluetooth adapters?
technoboy10
Scratcher
1000+ posts

Control Sphero 2.0 from Scratch

@alaindu22 I used the sphero library for python. Unfortunately, it's not the easiest to deal with.
There's a (slightly outdated) blockext extension for the sphero at http://github.com/blockext/sphero which works with both Scratch and Snap!.

I also made a quick Node JS sphero + scratch demo a little while back; I can get the source code for that if anybody wants it.

trans rights are human rights
alaindu22
Scratcher
100+ posts

Control Sphero 2.0 from Scratch

@ technoboy10 thanks for your answer…
can you post your Node JS sphero + scratch demo or give a link to get it ?

is it a demo for scratch 1.4 or scratch 2.0 ?

thanks you again
Alain
technoboy10
Scratcher
1000+ posts

Control Sphero 2.0 from Scratch

alaindu22 wrote:

@ technoboy10 thanks for your answer…
can you post your Node JS sphero + scratch demo or give a link to get it ?

is it a demo for scratch 1.4 or scratch 2.0 ?

thanks you again
Alain
My demo is for Scratch 2.0 offline editor. I'll upload the demo to github sometime today.

trans rights are human rights
technoboy10
Scratcher
1000+ posts

Control Sphero 2.0 from Scratch

http://github.com/technoboy10/scratch2sphero

Download the demo and install Node JS, run
npm install
in the directory, and then run scratch2sphero.js . Enjoy!

trans rights are human rights
alaindu22
Scratcher
100+ posts

Control Sphero 2.0 from Scratch

thanks for the file

What computer is used for this ? (mac Os , linux or windows )
do you think that it is possible to use it with all theese systems ?

Alain

Last edited by alaindu22 (July 29, 2014 11:53:49)

technoboy10
Scratcher
1000+ posts

Control Sphero 2.0 from Scratch

alaindu22 wrote:

thanks for the file

What computer is used for this ? (mac Os , linux or windows )
do you think that it is possible to use it with all theese systems ?

Alain
Node JS is fairly cross-platform, so probably all three.

trans rights are human rights
2014alannah
Scratcher
1 post

Control Sphero 2.0 from Scratch

that's nice
alaindu22
Scratcher
100+ posts

Control Sphero 2.0 from Scratch


I have tried with 2bot , kensington bluetooth dongle described by scraxe, and the scraxe file on picaxe website ( sphero_template.sb2)

I have success with scratch 2.0 on windows xp, vista, windows7, ubuntu, linux mint, puppy linux with this good bluetooth dongle
but with other bluetooth syteme the results are not so good.
thanks to scraxe for s2bot and the good pdf help file on picaxe website.

very simple to use with children 8 years old
they use the sphero_template.sb2 to program a lot of moves of the sphero and they enjoy …

Thanks again

Alain
Dankuk
Scratcher
77 posts

Control Sphero 2.0 from Scratch

cool [everyone v]

Enter my project competition and have a chance to win awesome prizes!
But be quick! The end date is 23/12/16!
Dankuk
Scratcher
77 posts

Control Sphero 2.0 from Scratch

<cool again>

Enter my project competition and have a chance to win awesome prizes!
But be quick! The end date is 23/12/16!
Dankuk
Scratcher
77 posts

Control Sphero 2.0 from Scratch

<distance to [ v]>

Enter my project competition and have a chance to win awesome prizes!
But be quick! The end date is 23/12/16!
alaindu22
Scratcher
100+ posts

Control Sphero 2.0 from Scratch

Hello

If you are interested in sphero and use it in schools with scratch I can send my scratch project…(it is not shared on scratch website because it uses experimental extensions )
It uses S2bot and sphero_template.sb2 evolution ( Many Thanks to Scraxe )

See these videos ( french language )


start ( 8min 50s ) boot detection , bluetooth calibration and tests
https://www.youtube.com/watch?v=GcBFBqBf-k8

video create a programm to move sphero 14 secondes
https://www.youtube.com/watch?v=vMqE6tEZToc

next video complicate the programm
https://www.youtube.com/watch?v=2NGA0VOzaZg


next video How to run scratch and sphero on a distant computer with internet and skype and teamviewer
https://www.youtube.com/watch?v=lSjQJ1_R19Q 9min 39sec


see also on scratch web site
http://scratch.mit.edu/projects/31450954/
calibration and starting

Alain
conanh
New to Scratch
1 post

Control Sphero 2.0 from Scratch

I got this installed on Windows 8 using Cygwin.

I had to install these packages: ruby, diffutils, rubygems,, ruby-pkg-config, texinfo, make, coreutils, gcc-core , , and git (if you want to obtain the scratch2sphero stuff via git).

Then I followed the instructions here: https://github.com/champierre/scratch2sphero

whew.

Now when I run scratch and scratch2sphero.rb, it looks like things are working, but my Sphero doesn't move. Here's the output:

$ ./scratch2sphero.rb
initialize
Connected to –>unknown<–
–>unknown<– – steps assigned 10
–>unknown<– – current_heading: 0, absolute_heading: 0
broadcast “back_led_on”
–>unknown<– – back LED on
broadcast “move”
–>unknown<– – roll 20, 0

So, the program is picking up the outputs from Scratch, but it doesn't look like it's passing them on.

Any suggestions? Thanks!




alaindu22
Scratcher
100+ posts

Control Sphero 2.0 from Scratch

Hello
a new video on youtube

http://youtu.be/Sta_YCi028I

Now with the new sphero's firmware it is impossible to have moves until obstacle.
the sphero move only 2 seconds with sphero_template.sb2

But with speed parameters and repeat command all is possible…
sorry for conanh but I no tips for ruby and i work with windows vista or puppy linux

Alain
card100
Scratcher
1000+ posts

Control Sphero 2.0 from Scratch

I don't seem to be able to connect to the computer.
The mac claims she is connected but it doesn't follow the program when I run it.
scratch2sphero says this when I run it:
can't write to sphero!
can't write to sphero!
connected –>unknown<–
I do have a sphero original if that matters…
This is what I did:

set [ time on] to [1]
when [ space] key pressed
broadcast [ back_led_on]
wait (time on) secs
broadcast [ back_led_off]
say [done] for (2) secs

Last edited by card100 (April 26, 2015 13:46:49)


-card100



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