Raspberry Pi Forums

knute

I've got 5 Pis running here, internet access is all through the same gateway but when I run apt update and apt full-upgrade two of them pulled in a new kernel today and the other three didn't. The two with the new kernel have 4.14.62 #1134 and the other three have 4.14.52 #1123. They are a mixed bag...

knute

You can use the server Pi's IP address. If for example your Pi has an IP of 192.168.1.2, on your desktop (on the same network) put 192.168.1.2 in the address line of your browser and it should display your web page. You can try that on your Pi as well.

knute

The DHTxx series use a simple checksum rather than a CRC. For a reliable reader try http://abyz.me.uk/rpi/pigpio/examples.html#pdif2_DHTXXD Thanks Joan, I looked at your code and I and have written a C program using the pigpio library that works pretty well too. I used Java for the program I'm work...

knute

I would suggest repeatedly reading the sensor value at a 2-second interval and discarding any IO errors. The returned data word is protected by a CRC so this practically guarantees that any read result that does not have an IO error is the value the sensor reported. So I've been reading the file ev...

knute

When I first tried using the dht11 overlay a while back, I had some difficulty getting it to work with a DHT22. I needed to set up some temperature sensors and so thought I would try again and it appears to work OK now with a DHT22. I am having one issue and that is what I think are conflicts with t...

knute

I've run stock apache web servers under linux for years without any problems and pis running apache for a couple of years. Keep your OS and your apache up to date and you should be just fine. Be careful with any CGI scripts that you write.

knute

HelloItsME1212 wrote: ↑
Sun Aug 05, 2018 8:04 pm
What it happens is thath if i use public key, it request me password after phassprase, and if i try to login with plantext password, it dosnt let me to log in, it says its incorrect.

Then take the passphrase off of the key.

knute

If you haven't programmed in any language before, you will probably end up buying several books before you get proficient in python. But really, the way to learn is to read a little in your programming book and write a lot of programs. Writing programs is where you learn how to apply the structure a...

knute

Well thanks, I never would have figured that out on my own!

knute

That doesn't work either but the bit about removing wolframe-engine is interesting. [email protected]:~ $ sudo apt-mark hold oracle-java7-jdk oracle-java7-jdk set on hold. [email protected]:~ $ sudo apt purge oracle-java8-jdk Reading package lists... Done Building dependency tree Reading state inf...

knute

It still wants to install Java 7. [email protected]:~ $ sudo apt purge java-common oracle-java8-jdk Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: oracle-java7-jdk The following packages will be REMOVED: ...

knute

If I do apt purge oracle-java8-jdk it wants to install java7. I just want to remove all of the installed java so I can install the latest version from a file. [email protected]:~ $ sudo apt purge oracle-java8-jdk Reading package lists... Done Building dependency tree Reading state information... Do...

knute

There are a lot of reasons why FTP can be stymied but I've not seen it report an authentication issue. Can you post a screen shot of your FileZilla? Does your Pi have a firewall? Are you using active or passive FTP? Is your computer with the FileZilla windows or linux?

knute

ok so im also on the FB group and have come up with some suggestions and problems.. its not going to be easily viable to do what i was thinking due to processor, memory limitations etc espically if its recorded as a raw file (WAV) where that could be a very huge file! You could use some compression...

knute

Crontab has its own arcane entry format so you would need to have 4 separate entries for the time of day you wish to start with, so 4 lines like this:" * 6 * * * reboot" repeated 4 times around the 24 hr. clock. If you are happy with 0,6,12 and 18 hours then you can put in one entry: 0 */6 * * * yo...

knute

.shtml should work unless you missed something. It doesn't require the XBitHack on statement to work.

knute

1. sudo a2enmod include 2. add the following to your config file in /etc/apache2/sites-available/000-default.conf (you might have changed this file's name) <Directory /var/www/html> Options +Includes AddType text/html .shtml AddOutputFilter INCLUDES .shtml XBitHack on </Directory> 3. sudo apachectl ...

knute

A typical .conf file contains: <VirtualHost blahblah.com> DocumentRoot /mnt/data1/public/Sites/html/blahblah Servername localhost ServerAlias www.blahblah.com <VirtualHost> Any comments/suggestions/help would be greatly appreciated. Try <VirtualHost *:80> and ServerName blahblah.com

knute

Thanks a lot for the apt response. Also,is there a feasibility to start storing panoramic images in the memory of the raspberry pi and scan it continuously to compare successive panoramic image frames,to detect changes if any?? Take a look at my MotionDetection program that I wrote in Java for an e...

knute

Im trying to develop a program that would display a camera feed, then take a picture after 3 seconds then buffer that to the same panel. the command im using is "raspistill -w 200 -h 200 -q 100 -t 5" Im still learning about the camera commands and java, Would this work for the command above and how...

knute

See this post: viewtopic.php?f=63&t=208781

knute

Anybody know why my .desktop file doesn't create a terminal? It runs the Java program just fine though. [Desktop Entry] Name=test Type=Application Exec=java -jar test.jar Terminal=true Hidden=false Here is the test.java program if you want to try it: import java.awt.*; import javax.swing.*; public c...

knute

The @reboot scheme isn't going to work either because the X11 desktop isn't running when cron tries to start the program, hence the headless errors. Probably the simplest method to run a program like this is to use a Desktop file in your autostart directory. In the /home/pi/.config/autostart directo...

knute

You do know that headless and GUI are mutually exclusive?

knute

Do you want to find the most popular pixel color or do you want the average color of your image? I'm not a python programmer but I can tell you how I would go about it and maybe then you can program it. 1) Create an array of integers for the color values of each pixel. 2) Create a hashmap that uses ...

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