Search found 28 matches

by AlanG
Mon Mar 30, 2015 10:13 pm
Forum: EV3 Software
Topic: 0.9.0 Problem with NXTUltrasonicSensor ?
Replies: 19
Views: 3061

Re: 0.9.0 Problem with NXTUltrasonicSensor ?

Right now, my only EV3 is running my previously-mentioned "everything but the ultrasonic sensor" test, which is monitored continually by "ev3control". Occasionally, I run WinSCP, so that I can take a quick look at the GPS log on the SD card. As of this moment, that test has run f...
by AlanG
Mon Mar 30, 2015 8:21 pm
Forum: EV3 Software
Topic: 0.9.0 Problem with NXTUltrasonicSensor ?
Replies: 19
Views: 3061

Re: 0.9.0 Problem with NXTUltrasonicSensor ?

The only network activity that was occurring was your "EV3control" program that was showing me a "console" display of the EV3's screen. The tricolor lamp is an "NXTColorSensor" object. It blinks 1 of the 3 LEDs about every 2 seconds, to indicate motors enabled/disabled ...
by AlanG
Mon Mar 30, 2015 4:44 pm
Forum: EV3 Software
Topic: 0.9.0 Problem with NXTUltrasonicSensor ?
Replies: 19
Views: 3061

Re: 0.9.0 Problem with NXTUltrasonicSensor ?

Early this morning, I ran my EV3 program with the GPS turned off, so that the ultrasonic sensor, the USB-connected WiFi, the 2 motors, and a tricolor lamp were the only peripherals connected to the EV3. (The lamp is a status indicator that blinks about once every 2 seconds.) I also changed the progr...
by AlanG
Sun Mar 29, 2015 8:31 pm
Forum: EV3 Software
Topic: 0.9.0 Problem with NXTUltrasonicSensor ?
Replies: 19
Views: 3061

Re: 0.9.0 Problem with NXTUltrasonicSensor ?

I never though that, while using 0.8.1, "ignorance was bliss", with respect to I2CExceptions, or that the absence of reported exceptions is, by itself, any indicator of stability. Rather, the exceptions and instability that I'm seeing now make me wonder whether you changed the timing of lo...
by AlanG
Sun Mar 29, 2015 6:33 pm
Forum: EV3 Software
Topic: 0.9.0 Problem with NXTUltrasonicSensor ?
Replies: 19
Views: 3061

Re: 0.9.0 Problem with NXTUltrasonicSensor ?

Sorry, I clumsily misspoke in my previous email: 1 bad "read" in every 3221 attempts, at 10 attempts per second, means 1 bad "read" every 322.1 seconds, or 5.4 MINUTES! If, after a bad "read", my robot is 0.1 second later in detecting an obstacle, it can still shut off ...
by AlanG
Sat Mar 28, 2015 11:58 pm
Forum: EV3 Software
Topic: 0.9.0 Problem with NXTUltrasonicSensor ?
Replies: 19
Views: 3061

Re: 0.9.0 Problem with NXTUltrasonicSensor ?

I got some results this morning that are hard to interpret, and it might take me some time to come up with a test program for you - because I may be dealing with "glitchy" hardware: my EV3, or its USB-connected Netgear WiFi, or its Bluetooth-connected GPS. According to logged data from the...
by AlanG
Fri Mar 27, 2015 11:07 pm
Forum: EV3 Software
Topic: 0.9.0 Problem with NXTUltrasonicSensor ?
Replies: 19
Views: 3061

Re: 0.9.0 Problem with NXTUltrasonicSensor ?

While waiting for your response, I decided to wrap a try-catch block around the "getData" call, specifically for the I2CException. I use the "catch" to write the exception's name and a timestamp onto System.err. Then, the 10-Hz thread is allowed to proceed as it normally would. E...
by AlanG
Fri Mar 27, 2015 6:40 pm
Forum: EV3 Software
Topic: 0.9.0 Problem with NXTUltrasonicSensor ?
Replies: 19
Views: 3061

0.9.0 Problem with NXTUltrasonicSensor ?

I've got some code that ran perfectly well for days at a time under 0.8.1, but it now fails randomly every time I run it under 0.9.0, just minutes after program startup. I initialize an NXTUltrasonicSensor this way: private int ultrasonicSamples = 1;//~25 ms is required to read all 8 samples; read t...
by AlanG
Wed Mar 25, 2015 6:58 pm
Forum: EV3 Software
Topic: Java 8 support
Replies: 19
Views: 11167

Re: Java 8 not yet supported

gloomyandy, I've been keeping up with Oracle's web page that covers the Java SE Embedded downloads: http://www.oracle.com/technetwork/java/embedded/embedded-se/downloads/javase-embedded-downloads-2209751.html Most recently, I have downloaded the latest Java 7 SE Embedded release (update 75) that's t...
by AlanG
Fri Dec 26, 2014 7:51 pm
Forum: EV3 Hardware
Topic: New WiFi Adapters linked to old drivers?
Replies: 4
Views: 1377

Re: New WiFi Adapters linked to old drivers?

That sounds odd. Are you sure that you followed the steps described? The modprobe for 8192cu should I think have resulted in the 8192cu directory being created. What happened when you ran modprobe? modprobe succeeded in adding 8192cu to the list displayed by lsmod. But the "echo" command ...
by AlanG
Fri Dec 26, 2014 4:54 pm
Forum: EV3 Hardware
Topic: New WiFi Adapters linked to old drivers?
Replies: 4
Views: 1377

New WiFi Adapters linked to old drivers?

I wonder whether it is possible for the leJOS team to set up the accompanying Linux kernel so that the /sys virtual file system will allow adding new vendor and product IDs to an existing USB driver, as described in: http://www.ha19.no/usb/ . I have tried doing what's described on the above web page...
by AlanG
Wed Nov 26, 2014 9:30 pm
Forum: EV3 Hardware
Topic: Edimax EW-7811UN not working on EV3
Replies: 29
Views: 4524

Re: Edimax EW-7811UN not working on EV3

To be honest I'm not sure that what you are doing is a good idea, but anyway, when leJOS is installed it uses the following command: rm /lib/modules/*/modules.dep to remove the existing module files, this should result in the files being recreated on the next boot. If the files do not get regenerat...
by AlanG
Wed Nov 26, 2014 7:04 pm
Forum: EV3 Hardware
Topic: Edimax EW-7811UN not working on EV3
Replies: 29
Views: 4524

Re: Edimax EW-7811UN not working on EV3

Sorry, can't really help very much. Debugging these sorts of things remotely is not easy. All I can offer are a few tips and to say that a lot of other people have this device working with no problems.... I assume you have WiFi AP that are visible in your location? If so have you done anything like...
by AlanG
Mon Aug 18, 2014 9:30 pm
Forum: EV3 Software
Topic: What's next after 0.8.1 beta?
Replies: 13
Views: 2763

Re: What's next after 0.8.1 beta?

Lawrie, Thanks to you and gloomyandy for your prompt responses. I have just emailed you a zip file, per your instructions. As to the Bluetooth serial code, I'm certain that a full implementation of the Bluetooth Serial Port Protocol ("SPP") is your fastest path to compatibility with all cu...
by AlanG
Mon Aug 18, 2014 7:09 pm
Forum: EV3 Software
Topic: Submitting code revisions to the leJOS Team
Replies: 1
Views: 562

Submitting code revisions to the leJOS Team

I received the following as part of a response from gloomyandy on Thursday, 14 August: "As to the GPS code, I'm not sure if/when this will be addressed. I suspect it will not be a high priority item as not many of the current dev team have GPS devices and our past experience has been that thy a...

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