pi_notes.md

My Raspberry Pi related notes

wpa_supplicant.conf

The wpa_supplicant.conf file is a way to pre-configure WiFi on a Raspi.
Such a file has the advantage that your Raspi will be connected to your WiFi after boot without keyboard interaction.

Follow these steps to setup your wpa_supplicant.conf on a fresh Raspi:

Step 1

Create a boot sd from image or insert an existing one to your main machine before inserting it to the Raspi.

Step 2

Use the lsblk command to identify the boot partition of the sd card.

$ lsblk
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda           8:0    0 465,8G  0 disk 
sdb           8:16   1  14,9G  0 disk 
├─sdb1        8:17   1   256M  0 part /media/heiko/boot
└─sdb2        8:18   1   7,3G  0 part

Step 3

Enter the partition cd /media/heiko/boot and create the conf file touch wpa_supplicant.conf.
Open the file with your editor of choice vim wpa_supplicant.conf.

country=de
update_config=1
ctrl_interface=/var/run/wpa_supplicant

network={
 scan_ssid=1
 ssid="Your_WiFi_Name"
 psk="Your_WiFi_Password"
}

Link to a manual to setup multiple networks in your wpa_supplicant.conf file.

Step 4

Eject the sd card, insert it into the Raspi and boot.
The device should be connected to your WiFi already.

Enable SSH on boot sd

You can enable SSH before booting your Raspi by simply creating an empty file with touch ssh in the same boot partition as in the example above.