I have released a hardware extension to control the CodeShield board with Scratch 2.0.
You can see a brief video of it in action: http://www.youtube.com/watch?v=vdmDf9VvPUs

and you can download the code at: https://github.com/MrYsLab/CodeShield_Scratch_Extension.

This extension is written in Java using JSON on both the Scratch side and the Arduino/CodeShield side. The code was written so that you can easily adapt it to communicate with any Arduino based project.

Very nice! Thanks for sharing, I will try this out if I can figure it out 0_o lol.

hi i am new i dont know how to use this thing

There is a pretty extensive set of instructions included in the zip file. Please let me know what problems you are having so I can help you get it running.

Apparenlty I added a period to the end of the link. Here is the correct link to github:

https://github.com/MrYsLab/CodeShield_Scratch_Extension

Sorry about any confusion.

Cant you make a RSC and scratchGPIO extention

I don't know what RSC means. Could you please explain. Also, do you mean Raspberry PI when you refer to scratchGPIO or is this something else?

itchy20 wrote:

I don't know what RSC means. Could you please explain. Also, do you mean Raspberry PI when you refer to scratchGPIO or is this something else?

somthing else posted it on the wrong thread see the tread rasberry pi

scratch 2.0 web url: Your text to link here… to get offline no errors to updates
or old version scratch 1.4 Your text to link here… NO UPDATES!!!
Available: Windows, 94, 7, Vista, 8l Mac OSX only for Starter and Ultimate

camodeer wrote:

hi i am new i dont know how to use this thing

Hello, camodeer! This forum is just Scratch connected with a prototyping board. By any chance, does your name involve hunting? Just wondering.

itchy20's new version (Python-based) can be found here: https://github.com/MrYsLab/S2A

itchy20's new version (Python-based) can be found here: https://github.com/MrYsLab/S2A

Oops! Double post.

Hi Itchy20
Love the fact that you've got Scratch 2 talking to Arduinos
However, I just tried loading the S2ajsonclient.ino into a Leonardo and got these errors

S2AjsonClient:26: error: ‘Encoder’ does not name a type
S2AjsonClient.ino: In function ‘char read_char()’:
S2AjsonClient:100: error: ‘encoder’ was not declared in this scope

Do you have any ideas on what might be going wrong

I'm using Arduino IDE version 1.0.5

regards

Simon

Thanks for letting me know about the problem.

Try loading the encoder library at: http://www.pjrc.com/teensy/td_libs_Encoder.html

It contains Encoder.h which is what the sketch is complaining about.

Please let me know if this solves your problem and if it does I will update the documentation with the link.

Sorry about the confusion.

Alan

Ta - do I just stick encoder,h somewhere or do I put the whole folder somewhere
Got it - I put the whole Encoder folder into Libraries

Simon

Right you are. I should have been more explicit.

Is it working now?

yep
Just using it in manual mode by typing commands but I can turn pins off and on just fine now.
I want to explore using it for my ScA for Scratch 1.4 as it would be nice to have a common Arduino client

regards

Simon

Great. I am glad it is working.

I am currently looking at some higher performance alternatives to the JSON client. I have not decided if I want to stick with an ascii interface which allows me to test my circuitry just by using the serial monitor (I started writing a sketch to do this a while ago, but it needs to be completed) or to try figuring out pyfirmata which is a binary protocol and a bear to understand and debug.

Alan

Well - since you'd used JSON I thought I'd better consider changing my PyFirmata based Scratch 1.4 interface so we could be compatible and save teachers from having to re-program their Arduino's depending on whether the internet was working that day or not - or until we have a fully working off-line Scratch 2

And as you say - the Firmata protocol/code is very densely packed and difficult to reverse engineer for non-experts in it

The Pyfirmata library is quite easy to use however.

If you do continue to use JSON, could I suggest not having S4A specfic constants in it like RGB_GREEN 10 so that a common JSON client could exist like Firmata and specific pin mapping takes place outside of the Arduino code

regards
Simon