The information here will usually just refer to raspberry pi information
Your raspberry pi may decide to change it's i.p address if it crashes or for what ever reason. you can prevent this happening and all the hassle that it causes ( especially if you are running your raspberry 'headless' ) by assigning it a static i.p address - below won't work on new Book worm OS
Open
sudo nano /etc/dhcpcd.conf
then change ip address..static...to what u want
interface eth0 - for a ethernet cable
static ip_address=192.168.0.10/24
static routers=192.168.0.1
static domain_name_servers=192.168.0.1
interface wlan0 - for wi-fi
static ip_address=192.168.1.200/24
static routers=192.168.1.1
static domain_name_servers=192.168.1.1
re-boot device
Headless operation
Look at these notes to point you in the right direction
If you use a tv screen as your raspberry monitor, maybe you cannot hear the sound, so a good fix is below
sudo nano /boot/config.txt
Go to the end of the file and type in these 3 lines
#Always force HDMI output and enable HDMI sound
hdmi_force_hotplug=1
hdmi_drive=2
Save these
changes by pressing ctrl+o
Exit by pressing ctrl + x
Can't delete a file, even thou you are the owner
sudo rm
-r ( File name )
USB sticks
Trying to copy a large file to a usb stick and it keeps saying there is insufficient room on the stick when you know that there is ?
i.e file is 5 g/byte - usb stick capacity is 30 g/byte
You could check to see if the disk is formatted to ' fat32 ' - if it is re format it and select the ' nfts ' option and try copying the file across again
Messed your taskbar up ?
sudo rm -r ~/.config/lxpanel
sudo
reboot
Forgotton if you installed 32 bit or 64 bit
operating system - here's how to check
uname -m
if response is aarch64 then its 64 bit
if response is armv7l then its 32 bit
or just type
getconf long_bit
response will be 32 or 64
Bear in mind 64 bit raspberry will
only install on raspberry pi3 and above
Problems updating / upgrading os
If you run sudo apt-get update and
it says Repository 'http://raspbian.raspberrypi.org/raspbian
buster InRelease' changed its 'Suite' value from
'testing' to 'stable'
running the below will fix the problem
sudo apt-get update --allow-releaseinfo-change
Then run update/upgrade commands
again and it will work
Problems playing DVD's on a raspberry pi
If you have a problem with some commercially made dvd's not playing correctly
you could try the below which instAlls
'libdvcss" it worked for me, but only
on 32 bit it won't work on 64 bit
wget http://www.videolan.org/pub/libdvdcss/1.2.12/libdvdcss-1.2.12.tar.bz2
bunzip2 libdvdcss-1.2.12.tar.bz2
tar -xvf libdvdcss-1.2.12.tar
cd
libdvdcss-1.2.12
./configure
make
sudo
make install
sudo
cp /usr/local/lib/libdvdcss*
/lib
Check the below site
https://raspi.tv/2012/watch-encrypted-dvd-on-raspberry-pi-by-streaming-to-omxplayer
What's on your raspberry network ?
sudo apt-get install -y nmap
To run the program type at the command line
sudo nmap -sn 192.168.x.xx/24
Replace x xx
with your ip address
https://snapcraft.io/install/nmap/raspbian
To
ping the remote raspberry pi
ping 192.168.x.xx
Problem with the terminal
emulator ?
click above link
Checking which version of software your raspberry pi is running
sudo cat /etc/os-release
Remote Desktop
sudo apt-get install putty / sudo apt-get install xrdp
or the best option
Black dot following mouse cursor when using VNC ?
Have you got an annoying
black dot above your mouse pointer when using VNC
To remove it - on the Raspberry pi you are using VNC on to view a remote
Raspberry Pi on your network
Open VNC VIEWER
file - preferences - expert - in the 'filter box ' type ' cursor'
where it says 'DotWhenNocursor' Change it to False
'UseLocalCursor@ Change it to false
Measuring temperature of pi by just typing 'temp'
nano /home/pi/.bash_aliases
alias temp='/usr/bin/vcgencmd measure_temp'
then type 'temp' to read temp
Installing remmina
sudo apt-get install remmina
Mouse slow or erratic
sudo nano /boot/cmdline.txt
Add the following to the line of text
usbhid.mousepoll=8
change '8' to whatever works best
You could also try putting the mouse wi-fi dongle on a USB extention cable ( 5 or 6 inches ) and moving it way from the internal Raspberry wi-fi circuitry
That dongle is most likely not faulty
If you have a dongle you thought was for 1090mhz but it never seems to pick up signals at this frequency, check to see if it says 'Fitipower FC0012' (maybe FC0013) with a reported gain of 19.2 if so then there is not a problem with the dongle, it's the fitipower chip which is the 'problem' - this type of dongle will not tune to 1090mhz, the maximum usable frequency is around 950 mhz.The good news is it will be ok for acars and the vdl2 programs (131/136 mhz )
Using a usb web camera with a raspberry pi
the first thing to do is to read the below web pages which explain very simply how to go about things
https://www.raspberrypi.org/documentation/usage/webcams/
https://www.raspberrypi.org/documentation/linux/usage/cron.md
you will need to install
sudo apt-get install fswebcam
to take an image its
fswebcam -r 1280x720 --no-banner image 1.jpg
YOU CAN SPECIFY A FOLDER TO HOLD THE IMAGES AND WRITE A SCRIPT TO MAKE IT EASIER TO RUN - SEE THE TOP WEB SITE FOR INFORMATION ON HOW TO DO THAT
to automatically take an image every ten minutes
you can edit 'cron' < crontab -e >
then insert < */10 * * * * /home/pi/webcam/webcam.sh 2>&1 > which is specifying a folder called <webcam> in the pi directory
Using a usb web cam as a surveilance camera
sudo apt-get install guvcview
Raspberry pi camera
Using the raspberry pi camera for surveilance
https://gndtovcc.home.blog/2020/04/15/video-streaming-with-raspberry-pi-camera/
Above will not work for Raspberry 'Bookworm' the below however will will work
OSOSOYOO Web Camera Module for Raspberry pi board
You can disable the red L.E.D on the camera – which can be a distraction if you are using the camera as a security device or monitoring wild life – check the following link out
https://www.raspberrypi-spy.co.uk/2013/05/how-to-disable-the-red-led-on-the-pi-camera-module/
Audio sounds scratchy ?
https://www.vuepilot.com/support/article/fixing-raspberry-pi-audio-issues/
Operating from France
On holiday and want to operate from France ?
For a stay of less than three months there are no special formalities, please look at the below link
If you are wanting to operating for more than three months i.e perhaps because you are a foreigner but a resident of France then you will want to apply using this form
Make sure you submit the latest form i.e Feb 2020 at the time of writing this
Do not forget to obtain your HAREC document from your licensing authority ( Ofcom if you are British ) it's needed for your application to progress smoothly