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by knute
Sat Sep 14, 2019 9:10 pm
Forum: Troubleshooting
Topic: Clock?
Replies: 1
Views: 88

Clock?

Has anybody noticed that it takes a long time for the clock to set with Buster? From the time the desktop is up, it takes my 3B+ and 4 between 1:00 and 1:20 to set. I also noticed something else interesting, the Pi remembers when it was shut down and when it comes back it has that time until it upda...
by knute
Sat Sep 14, 2019 8:32 pm
Forum: General discussion
Topic: Locked topic question?
Replies: 4
Views: 181

Re: Locked topic question?

Thanks very much for the reply and the unlocking. I posted a follow up and you can lock it again if you wish.

Thanks,

knute...
by knute
Sat Sep 14, 2019 8:29 pm
Forum: Troubleshooting
Topic: Java GUI to set static IP parameters in Jessie
Replies: 2
Views: 593

Re: Java GUI to set static IP parameters in Jessie

New code for Buster at http://knutejohnson.com/pi. The old code only worked on Jessie and that is now ancient history.
by knute
Sat Sep 14, 2019 8:27 pm
Forum: Java
Topic: Change static IP from app
Replies: 4
Views: 91

Re: Change static IP from app

I wrote a Java application for changing the IP settings. You are free to steal as much of that as is helpful. The program is IPConfig. http://knutejohnson.com/pi
by knute
Sat Sep 14, 2019 7:55 pm
Forum: General discussion
Topic: Locked topic question?
Replies: 4
Views: 181

Locked topic question?

Two years ago I made a post that nobody was interested at the time but a few days ago somebody was. But before I could respond the thread was locked and since there is no way that I know of to send a note to the locker I couldn't request it be unlocked. And maybe it can't be I don't know. I follow m...
by knute
Wed Sep 04, 2019 3:11 pm
Forum: Beginners
Topic: Filezilla Server, Raspberry Pi 4
Replies: 4
Views: 156

Re: Filezilla Server, Raspberry Pi 4

I think filezilla only makes a server for Windows. Raspbian comes with SFTP already installed. If you want a plain Jane FTP server both ftpd and vsftp are available in the repository. I've used vsftp extensively on Linux servers and on my Pis. It is easy enough to configure and is fast too.
by knute
Sat Aug 24, 2019 10:51 pm
Forum: Troubleshooting
Topic: Another Autostart Thread... (Sorry)
Replies: 2
Views: 110

Re: Another Autostart Thread... (Sorry)

I would be curious to know how you run a GUI application without a desktop?

Did you compile it yourself or did you find a compiled file somewhere?

As to starting it, run it as a systemd service.
by knute
Sat Aug 17, 2019 7:37 pm
Forum: Python
Topic: Old-school GUI - Possible? (Beware, silly purpose)
Replies: 25
Views: 3555

Re: Old-school GUI - Possible? (Beware, silly purpose)

And an example of setting up your menu with buttons. You will see right away why I used the labels in the original but it does work. import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Buttons extends JFrame { private Color mBlue = new Color(0x3e86ca); private Color mGreen...
by knute
Sat Aug 17, 2019 7:01 pm
Forum: Python
Topic: Old-school GUI - Possible? (Beware, silly purpose)
Replies: 25
Views: 3555

Re: Old-school GUI - Possible? (Beware, silly purpose)

One way to swap out panels with a button: import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Panels extends JFrame { private final Panel1 panel1; private final Panel2 panel2; public Panels() { super("Panels"); setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); setPreferre...
by knute
Sat Aug 17, 2019 6:37 pm
Forum: Python
Topic: Old-school GUI - Possible? (Beware, silly purpose)
Replies: 25
Views: 3555

Re: Old-school GUI - Possible? (Beware, silly purpose)

Okay might need a bit more help... :lol: So, code is running fine, currently looking at on the PC just to have a better workspace - using Eclipse. Again, never used JAVA, but some things are clear to me, like the button actions and the buttons used: class TabAction extends AbstractAction { public v...
by knute
Tue Aug 13, 2019 9:38 pm
Forum: Python
Topic: Old-school GUI - Possible? (Beware, silly purpose)
Replies: 25
Views: 3555

Re: Old-school GUI - Possible? (Beware, silly purpose)

That little piece of code, creates the image and responds to keystrokes as you wanted. There (currently) is no other code. If you have Java 11 you can just run it from the command line with: java McCarty.java. If you are running Java 8 you will need to compile it and then run it. javac McCarty.java ...
by knute
Mon Aug 12, 2019 6:45 pm
Forum: Python
Topic: Old-school GUI - Possible? (Beware, silly purpose)
Replies: 25
Views: 3555

Re: Old-school GUI - Possible? (Beware, silly purpose)

Spaziba wrote:
Mon Aug 12, 2019 6:01 pm

Oh my, that is also awesome! Down and dirty for the win.
Guess it's time to learn JAVA - well at least learn enough to make this.
It was kind of fun to play with. Let me know if you want some help with it. pi at knutejohnson dot com
by knute
Sun Aug 11, 2019 3:50 pm
Forum: Python
Topic: Old-school GUI - Possible? (Beware, silly purpose)
Replies: 25
Views: 3555

Re: Old-school GUI - Possible? (Beware, silly purpose)

This is a perfect job for Java. Graphics are easy and so is the logic. This is down and dirty with no attempt to streamline. import java.awt.*; import java.awt.event.*; import java.util.*; import javax.swing.*; public class McCarty extends JFrame { public McCarty() { setLayout(new GridBagLayout()); ...
by knute
Thu Aug 08, 2019 8:01 pm
Forum: C/C++
Topic: Clock_nanosleep issues
Replies: 4
Views: 2055

Re: Clock_nanosleep issues

joan wrote:
Thu Aug 08, 2019 8:43 am
We don't need your existing code. We need the smallest program you can create which exhibits the problem. Additionally the act of preparing such a program may point you to a bug in your code.
From the wayback machine a SSCCE. http://www.sscce.org/

Thank you Andrew Thompson.
by knute
Tue Aug 06, 2019 10:42 pm
Forum: Java
Topic: Install Java7 on Raspian buster
Replies: 10
Views: 2790

Re: Install Java7 on Raspian buster

When you attempt to run it under Java 8 what errors are you getting? Java 7 is so far beyond end of life that without going back to a much older version of Raspbian you probably aren't going to get it to run and then you are going to run into problems getting the old version of Raspbian to run on yo...
by knute
Sun Aug 04, 2019 5:22 pm
Forum: Troubleshooting
Topic: crontab update
Replies: 16
Views: 831

Re: crontab update

Yes I know via crontab -e and then 0 16 * * * sudo apt-get update && sudo apt-get upgrade, && sudo reboot but it doesn't work If apt-get upgrade stops and asks for input it isn't going to get any and will hang right there forever. One of the easiest ways to know that cron has done a job for you is ...
by knute
Sat Aug 03, 2019 8:04 pm
Forum: Java
Topic: Install Java7 on Raspian buster
Replies: 10
Views: 2790

Re: Install Java7 on Raspian buster

tomcat 8 and 9 are available for Buster. Java 11 is the standard on Buster. Can you not run tomcat with Java 11? Java 8, 9, and 10 are also available for Buster.
by knute
Sat Aug 03, 2019 7:57 pm
Forum: Java
Topic: If else help
Replies: 16
Views: 3561

Re: If else help

Download the docs, they are very helpful. An show us your code! java.lang.String boolean equalsIgnoreCase​(String anotherString) Compares this String to another String, ignoring case considerations. String toLowerCase() Converts all of the characters in this String to lower case using the rules of t...
by knute
Thu Aug 01, 2019 5:09 pm
Forum: Beginners
Topic: Restarting after a shut down w/o pulling the power cord?
Replies: 5
Views: 225

Re: Restarting after a shut down w/o pulling the power cord?

Momentarily ground GPIO pin BCM 3.
by knute
Sun Jul 28, 2019 7:34 pm
Forum: Troubleshooting
Topic: Java code into android app
Replies: 4
Views: 128

Re: Java code into android app

Take a look at this. I haven't had time to try it but I think it is exactly what you are looking for.

https://gluonhq.com/products/mobile/javafxports/
by knute
Sat Jul 27, 2019 9:13 pm
Forum: Beginners
Topic: Microphone audio input to hdmi output
Replies: 7
Views: 213

Re: Microphone audio input to hdmi output

Well with usb microphones, I can only find either bulky expensive ones, or small ones like this: https://www.amazon.com/Tanbin-Computer-Microphone-Smallest-Recording/dp/B06XVMP7FF/ref=sr_1_5?keywords=small+usb+microphone&qid=1564154470&s=gateway&sr=8-5 I need it to be small, but these kinds ^^ seem...
by knute
Fri Jul 26, 2019 3:11 pm
Forum: Beginners
Topic: Microphone audio input to hdmi output
Replies: 7
Views: 213

Re: Microphone audio input to hdmi output

A simple USB microphone won't work?
by knute
Fri Jul 26, 2019 3:08 pm
Forum: Troubleshooting
Topic: pigpio?
Replies: 2
Views: 134

Re: pigpio?

Thanks Joan!
by knute
Thu Jul 25, 2019 10:08 pm
Forum: Troubleshooting
Topic: pigpio?
Replies: 2
Views: 134

pigpio?

Is it possible to run two programs using the pigpio libraries at the same time? I'm getting an error that leads me to think that isn't possible.

2019-07-25 17:05:21 initInitialise: Can't lock /var/run/pigpio.pid

Thanks!
by knute
Tue Jul 23, 2019 3:46 pm
Forum: Beginners
Topic: Raspberry Pi 3 Temperature sensor setup
Replies: 3
Views: 136

Re: Raspberry Pi 3 Temperature sensor setup

Go to my website and look at the first article: http://pi.585ranch.com/, it has a picture on how to wire the DHTxx parts. It also has a description of how to use the dtoverlay to get the temperature and humidity data from a DHTxx part and some simple programs to do that.

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