MINDSTORM, NXT-G & ISADORA

vanakaru

Start here with some good information about installing it

https://discussions.apple.com/thread/4158314?start=0&tstart=0

Download with Firefox

[MINDSTORMS NXT 2.0](http://en-us.kb.lego.com/ics/support/DLRedirect.asp?fileNum=84974&deptID=5622)

gavspav

I downloaded that .iso from your link vanakaru and it appears to install ok!

I still haven't got isadora>nxt communication to work - but quite close.

A few additions to my earlier post. I didn't connect to the nxt brick using the nxt software but just paired via bluetooth. I used ls /dev/tty.* via terminal to find out which com port i was using. /dev/tty.NXT-DevB for me.

I put this into the diablu settings and in the log window it opens the port and starts running the server.

It tells you the address legosc is listening too. You use the ip address in the udp adress section of the osc transmit actor in the isadora window. And the last 4 digit number is the port number.

Not sure why I am giving this advice as as I said I haven't actually got it to work!

I've connected legosc to the nxt brick and am receiving osc data from Isadora but haven't managed to get the motor to move!

bruper

exciting news gavspav you're getting closer!

gavspav

Even closer now - got it working with the Pure Data sample patch and Isadora looked like it should work but then the batteries dies in the Nxt brick.

Loads of batteries in them things. Send me some more!

bruper

are you in London? I can take you some this w/e from Portugal :)

gavspav

Ok finally I have some batteries and can now confirm that Isadora and LegoOsc DON'T work together!

For some reason either LegoOsc or the NXT brick don't understand the OSC messages that Isadora is spitting out.

The workaround would be to write some little bridging app in Max or PD that converts say midi to OSC that works.

A simple if clumsy solution.

mark

Dear Gavin,

I can assure you that the OSC messages Isadora sends follow the standard. Have you tried turning off type tags? What kind of messages does the NXT brick expect? Is there any documentation on that?

Best Wishes,

Mark

gavspav

Hmm well it could be human error but it really didn't seem like it. Maybe I'll have another look on Monday.

If I turn off type tags then legoOsc doesn't receive/understand the incoming messages.

I had the Pure Data example working and the legoosc java code reports the incoming OSC messages in its log window.

I tried it with Isadora and had identical messages in the legoosc log window but the lego brick didn't respond. I assumed it was something to do with OSC message format as I have had problems with this before (not just with Isadora).

One thing which could potentially be causing problems is that the message is in the format /motorForward 0 i

Could the spaces be causing an issue? Or the fact that I am sending integers?

I'm straw clutching rather than employing logic.

mark

well what exactly comes after the /motorForward part?

/motorForward is a valid OSC address.

But is the rest text? is the actual message "0 i" (less the quotes) ? Or???

Best Wishes,

Mark

bruper

may I send you some good vibes of encouragement not to give up??!! thank you

gavspav

It's /motorForward i n

where i is the number of the motor and n is the speed of the motor.

So, "/motorForward 1 4" would tell motor 1 to turn quite slowly and

"/motorForward 1 127" would tell it to turn alot quicker.

There are no quotes in the message - I just put those in. I've never seen an OSC message like that before normally its /address/ value but this is the way it seems to be with LegoOSC.

The pure data patch sends /MotorForward 1 $1 (where $1 is the value) and it works.

Isadora - I set the transmit address to /MotorForward 1 with the value determined by the value input of course.

Like I said the values received by LegoOsc look identical in the log window, except it don't work.

mark

Is it possible to send the Pure Data patch that outputs the working values. I could analyze them to see how they are different than what Isadora sends.

Best Wishes,

Mark

gavspav

Here we are. 2e4051-nxt.pd.zip