====== Raspberry Pi ======
{{:public:openlab:raspi.jpg?nolink&400|}}

[[https://www.raspberrypi.org/products/raspberry-pi-3-model-b-plus/]]
===== Prior to boot =====
OS?
  * NOOBS
  * Raspbian
  * Probabbly any other Linux with ARM support

Provide enough power (undervoltage causes instability).

Connect HDMI - if applicable (no cable present at boot will by default disable video output).

Connect peripheals?

edit/create in /boot
  * enable ssh? - create empty file "ssh")
  * preconfigure Wi-Fi? file wpa_supplicant.conf

Example:
<code>
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=CZ

network={
    ssid="YOURSSID"
    psk="YOURPASSWORD"
    scan_ssid=1
}
</code>
  * System configuration "config" file 
    * force HDMI out
    * many other system options

===== First boot =====
User: pi Password: raspberry

  * Change default password?
  * Connect to internet?
  * apt update & upgrade
  * raspi-config
  * 

===== Programming =====
Python recomended, any language should be feasible though.
Many libraries available (as usual with python https://xkcd.com/353/)
  * https://pythonhosted.org/sense-hat/
  * https://gpiozero.readthedocs.io/en/stable/
  * 

===== Ad-hoc networking =====

example of /etc/network/interfaces

<code>
auto wlan0
iface wlan0 inet static
    address {{ wlan_ip }}
    netmask 255.255.255.0
    wireless-channel 48
    wireless-essid crocs-raspi-net
    wireless-txpower 1
    wireless-mode ad-hoc

</code>

===== Games =====
  * https://github.com/AndrewCRichards/TetriPiSense
  * https://github.com/martinohanlon/AstroPiSnake
  * many others