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Communication with Arduino MEGA and Firmata, can't read from above pin 13

[1 Reply]
- 30-Dec-2011 08:51 AM
- Forum: Integration and Hardware
Hi,

I'm working on an installation with 16 buttons and 16 leds. I set it up with an arduino Mega. Now I try to communicate with firmata. I tried first with Firmata Test, and this works well, I can read from all digital Inputs.

But if I try it in my own script, I can't read from my digital pins. I've found some posts about a problem of the Firmata to read the digital pins above 13.

I can send output to all my pins, but not read from them.

Has this been solved somehow? Has anyone a solution for this? Or an idea what to do?

Thank you for your help!

Strange error in a for loop...

[4 Replies]
- 30-Sep-2010 08:58 AM
- Forum: Programming Questions
Hi,

I have a nice little server app running. But from time to time, it crashes, for no visible reason.

here is the error Processing tells me (or console when I exported the app:

Exception in thread "Animation Thread" java.lang.ArrayIndexOutOfBoundsException:1

at server_app.writeToArray(server_app.java:108)

at server_app.draw(server_app.java:97)

at processing.core.PApplet.handleDraw(PApplet.java:1606)

at processing.core.PApplet.run(PApplet.java:1503)

at java.lang.Thread.run(Thread.java:637

Ok, here is my line 108, which looks like it makes problems:

   for(int j = 0; j <signals; j++) {

   setDmxChannel(3,200);

   setDmxChannel(1,pos_arr);

   }

  }

(first line is 108)

So, anyone has an Idea what is happening, or how I could prevent that? Or someone can write me an AppleScript, that if this error is happening, it restarts the computer?

Thanks for you help!

Greetings

Nicolas

try& catch Server Connection with Processing

[1 Reply]
- 31-Aug-2010 08:48 AM
- Forum: Programming Questions
Hi,

I'm working on an Processing project, where I send data via the network to another Processing running machine. The problem is, when the second (server) machine isnt running, the first machine (client) crashes, because he cant connect to the server.

As far as I know, I need to do a try & catch. So if he can't connect to the server, he waits a bit, tries it again...

I never done something like this before, and as far as I searched for it here, I haven't found a valuable solution.

So, anyone can help me on this topic?

I'm using the Network library, and I try to connect to the server like this:

c = new Client(this, "192.168.10.22", 12345);

Thanks for any help!

Greetings

Nicolas

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