Uncategorized Maciej 25 November 2018

Raspberry PI, headless, RSA, Camera Setup

Hello,

In this tutorial I will be showing you how to get started with a Raspberry Pi Zero W, How you can set it up and get your projects up and running.
In this post I will be covering the following topics :-

Run system on Raspberry Pi
Turn on SSH
Configure network
Prepare SSH RSA keys (so you don’t have to provide password each time you are logged in)
Turn on I2C communication
Turn on camera

And all of this without connecting mouse,keyboard or display to our Raspberry Pi

OK we need to have system image so we can deploy it on RPi, I chose “Raspbian Stretch with Desktop” ( because it already has all the things that we will need) we download it from :

https://www.raspberrypi.org/downloads/raspbian/

lets unzip the downloaded file (Use 7zip program, windows archive may corrupt the files )

And lets write image into our SD card

I’ve used “Win32 Disk Imager”

At the left Image file we choose what was unzipped in previous step, at the right we choose SD card itself ( If you don’t have anything in devices combobox turn off program and insert SD card, then turn on Win32 Disk Imager again)

Click Write, after couple minutes we have our SD card almost ready

Firstly we need to turn on ‘ssh’ so we can control Rpi from console

Open SD card directory ( in my case H: ) and place the ssh file here (without any extensions for this tutorial I have used commander, You can do the same in Windows explorer but then you have to remove file extension)

and we have:

As you see there is no extension. There is just single name “ssh”

Ok, now we have to configure network so Rpi will know where and how to connect. We need to create and edit “wpa_supplicant.conf” file, we placed in at the same place as previous ssh file so in main SD card directory

wpa_supplicant.conf content:

country=US
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
ssid="network name"
scan_ssid=1
psk="network password"
key_mgmt=WPA-PSK
}

country=US

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev

update_config=1

network={

ssid="network name"

scan_ssid=1

psk="network password"

key_mgmt=WPA-PSK

}

I’ve assume that your WiFi has WPA-PSK encryption (most popular option)

Ofcourse you have to change networkName and networkPassword ( but you can leave there question marks)

SD card is ready, insert it in the Pi and connect power to it. (remember to connect power cable with USB labeled as PWR IN)

Green diode will blink for a while then it will be solid green indicating successful boot.

Now lets connect our Raspberry P, I’ve used putty

https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html

Lets fill fields in order to mark at printscreen, in Saved Session you can provide any name you want I’ve put raspberry pi 2 because its my second RPi

HostName: pi@raspberrypi.local
port: 22
Saved Session: dowolne

HostName: pi@raspberrypi.local

port: 22

Saved Session: dowolne

Click saved so we will have it next time we turn on putty, and click open

We should see something like that

[spoiler title=’There is an error’ style=’default’ collapse_link=’true’]

lets ping our raspberry pi with cmd (How to run CMD) using address “raspberrypi.local”

ping raspberrypi.local

1	ping raspberrypi.local

if no answer lets try another address

ping raspberry.local

1	ping raspberry.local

if there is still nothing lets check at WIFI router itself if Raspberry Pi is connected and lets take its IP address

ping 192.168.0.25

1	ping 192.168.0.25

proper pings looks like :

[/spoiler]

lets write default password :

raspberry

raspberry

and we got something like:

[spoiler title=’Change password’ style=’default’ collapse_link=’true’]

command

passwd

passwd

[/spoiler]

lets also install mcedit text editor its much simpler then vim or nano

sudo apt install mc

1	sudo apt install mc

I recommend to make RSA keys so you don’t have to provide password each time you connect to RPi

[spoiler title=’Create RSA keys ‘ style=’default’ collapse_link=’true’]

didn’t translate yet in comment ping me up 😉

potrzebujemy puttygen

https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html

klikamy Generate i na szarym tle poruszamy myszka az progress bar sie wypelni. Klikamy nastepnie

Save public key zapisujemy pod nazwa “cokolwiek.pub”

Save private key “cokolwiek.ppk”

dla utrzymania porządku “cokolwiek” w dwóch plikach powinno być takie samo. Pliki zapisujemy w folderze

folder uzytkownika\.ssh\

1	folder uzytkownika\.ssh\

w moim przypadku

c:\Users\Admin\.ssh\

1	c:\Users\Admin\.ssh\

NIE zamykamy na razie okna puttyGen.

wracamy do podłączonego putty:

tworzymy folder .ssh:

mkdir .ssh

1	mkdir .ssh

i tworzymy plik authorized_keys

mcedit .ssh/authorized_keys

1	mcedit .ssh/authorized_keys

kopiujemy publiczny klucz z puttygen:

a w oknie putty wciskajac [Shift+ insert] wklajamy:

dodajemy enter na koncu linii. i wciskamy [F2] na klawiaturze

[Enter] i [F10] zeby wyjsc

sprawdzmy czy sie dobrze wgralo:

cat ~/.ssh/authorized_keys

1	cat ~/.ssh/authorized_keys

restarujemy puttego

w nowym oknie :

wskazuemy plik ktory zapisalismy PuttyGen

wracamy do zapisanych sesji

klikamy save i open

tym razem system nie poprosi nas o hasło 🙂

wygenerowane klucze RSA (pub, ppk) możemy użyć do kolejnych raspberryPi do łączenia z tego komputera. Do kolejnych komputerów generujemy pliki RSA jeszcze raz a w RaspberryPi w authorized_keys wklejamy kolejne publiczne klucze – każdy w nowej linii

[/spoiler]

Lets configure camera I2c

in putty: