Scratch

abee wrote:

... However it requires two PCs and some skill of network.
Do you have both of them? If so I will tell you how it works.

I think I would be able to do this in C and I have 2 PC's. But isn't it possible to configure the ports, to let it run on one PC? Seems that touch_classroom developed something like this in python:
http://scratch.mit.edu/forums/viewtopic.php?pid=438133#p438133

Thanks a lot abee!

abee wrote:

You need to open the TCP/IP port #42001 for Scratch Mesh.

So now I'm able to snoop for the protocol - or does there exist any descriptions of the application layer protocol?

abee wrote:

Many technical documents for Mindstorms NXT are available.

I saw the NXT iBrick's firmware to be open source. But what's about the NXT sensors itself? They are using analogue or I2C. Or do you think touch_classroom connects to the NXT iBrick instead? Then it would not be a suitable solution for my kids...

abee wrote:

But there are no documents for WeDo.

From link http://thenxtstep.blogspot.com/2009/01/wedo-sensors-and-nxt.html I've learned that the WeDo sensors are all analogue. So one way would be, to use a picoboard to read the values. But then I would need another hardware for all kids! So I search a little bit longer and I've found: http://news.lugnet.com/robotics/rcx/?n=2954:; Though I have no glue of LUA, I've requested the sources already - let's see.

djembii wrote:

I saw the NXT iBrick's firmware to be open source. But what's about the NXT sensors itself? They are using analogue or I2C. Or do you think touch_classroom connects to the NXT iBrick instead? Then it would not be a suitable solution for my kids...

Some of NXT sensor may be possible to use as WeDo sensor. But NXT architecture is very different from WeDo. (NXT is a standalone micro computer. WeDo is a slave unit of PC.) So we should consider NXT and WeDo separately, I think.

From link http://thenxtstep.blogspot.com/2009/01/wedo-sensors-and-nxt.html I've learned that the WeDo sensors are all analogue. So one way would be, to use a picoboard to read the values. But then I would need another hardware for all kids!

Thank you for nice information. I have analyzed WeDo's  PF motor for my device that using Arduino before. (I made this for an elementary school in Japan.)
http://scratch.mit.edu/forums/viewtopic.php?pid=299068#p299068
http://twitpic.com/1zj98k
But I have not done about sensors. This information may make possible to use WeDo sensors for PicoBoard or other devices and vice versa. However it requires some work, as you wrote.

So I search a little bit longer and I've found: http://news.lugnet.com/robotics/rcx/?n=2954:; Though I have no glue of LUA, I've requested the sources already - let's see.

Very interesting! It is good if we get the source code.

Thanks a lot abee!! That rocks!!! The only hitch are the 2 stiffy cables to 2 different computers. But as the Wedo hub is closed with screw, I think I order some of these ultra thin usb extension cables and replace the original cable.

abee wrote:

http://twitpic.com/1zj98k

There I saw you using a kind of connection brick. Where do you got this from?

Good idea! So with one cable you get 2 picoboard connectors... Thanks!

vorburger wrote:

would http://trac.assembla.com/scratchonlinux … eDoLinux.c help you?

Wow. Thank you!

Thank you for sharing the video! How cute the cleaning car! And the presentation by your kid is perfect!

I am planing on buying a Wedo set, but I need to know something first:
Can you use more than one motor at a time,and if so, how many?

bantammenace wrote:

@abee, Thanks for the controllingTwoMotors image. Do you have version for Linux ? If you do would you be able to share it and provide simple installation instructions ? I am a total noob to Linux, robotics and electronics.
I ask because I intend running Scratch on a Raspberry Pi [ ...]

Ditto!  I've managed to get hold of two WeDo kits, and have now found that the reference to "3 hubs" in the Lego spiel does not appear to equate to the RPi and Scratch.  I have downloaded the TwoMotors zip, thanks, and just about managed to crow-bar its contents into the /usr/share/scratch directory - but it does not appear to be that simple .. and beyond a newbie like me!

Either simple instructions on how to add the two motors functionalility to my RPi build, or confirmation that this ability will be added to an imminent Srcth Update, would be gratefully received!

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