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+======Headless Setup======
+[[:english#rocview|{{  :viewer.png}}]][[:english|{{  :rocrail-logo-35.png}}]]
+[[:english|Content]] -> [[:english#rocview|Rocview ]] -> [[:rocnet:cam-en|Camera Streaming]]
+  * **[[:rocnet:headless-cam-en|Headless Setup]]**
+  * [[:raspi:install:rpi-install-en|Rocrail graphical install]]
+|< >|
+^  [[https://en.wikipedia.org/wiki/Headless_computer|Wikipedia explains "headless"]]  ^
+ \\
+ \\
+=====SD Card with Pi OS Lite (32bit)=====
+Download the Raspberry Pi Imager:
+  * __**[[https://www.raspberrypi.org/software/|Raspberry Pi Imager]]**__
+{{:rocnet:pi-img-os-0.png?240}}{{:rocnet:pi-img-os-1.png? 240}}{{:rocnet:pi-img-os-2.png? 240}}{{:rocnet:pi-img-os-3.png? 240}}{{:rocnet:pi-img-os-00.png? 240}}\\
+Insert a SD-Card.\\
+Start the "Raspberry Pi Imager" program.\\
+Select:
+  - CHOOSE OS
+  - Pi OS Other
+  - Pi OS Lite (32bit)
+See also __**[[:raspi:install:rpi-install-en#advanced_options|Advanced Options]]**__ for setting up SSH and WiFi.\\
+ \\
+=====Config the Boot Partition=====
+Insert the SD-Card again, after creating of the Image on the SD-Card has finished.\\
+The SD-Card should be visible in the File-Explorer as ''boot''.\\
+ \\
+To make the Zero able to connect to the WiFi, it must get some settings to get this done.\\
+The easiest way is to create a text file locally named as ''wpa_supplicant.conf'' with the following content:
+<code>
+country=DE
+ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
+update_config=1
+network={
+       ssid="<my SSID1>"
+       psk="<my PASSWORD>"
+       key_mgmt=WPA-PSK
+       priority=2
+}
+network={
+       ssid="<my SSID2>"
+       psk="<my PASSWORD>"
+       key_mgmt=WPA-PSK
+       priority=1
+}
+</code>
+Replace the "<my*>" values with the access information of the Access Point.\\
+  * **Note:** //Multiple network definitions may be added. The highest priority will be connected first if available.// \\
+Copy an empty file named ''SSH'', and ''wpa_supplicant.conf'' to ''boot''. (Under Windows mostly drive ''D:'')\\
+to the boot partition of the SD-Card:\\
+{{:rocnet:cam:boot-1.png?400}}{{:rocnet:cam:boot-2.png?400}}\\
+  - Unmount/Eject the SD-Card.
+  - Insert the SD-Card into the slot on the Raspberry Pi.
+  - Power on the Raspberry Pi.
+  - Wait a few minutes to give Raspbian time to resize the file system. (With a connected monitor, on the Mini-HDMI, the progress can be watched.)
+ \\
+=====Raspbian SSH Connect=====
+<code>
+ssh pi@raspberrypi
+</code>
+The standard password is ''raspberry'' \\
+ \\
+=====Raspbian Update=====
+<code>
+sudo apt update
+sudo apt upgrade
+</code>
+ \\
+=====Raspi-Config=====
+<code>
+ssh pi@raspberrypi
+sudo raspi-config
+</code>
+{{:rocnet:cam:conf-1.png?600}}\\
+{{:rocnet:cam:conf-2.png?600}}\\
+{{:rocnet:cam:conf-3.png?600}}\\
+{{:rocnet:cam:conf-4.png?600}}\\
+{{:rocnet:cam:conf-5.png?600}}\\
+{{:rocnet:cam:conf-6.png?600}}\\
+ \\
+=====Python Script=====
+Unzip the {{:rocnet:cam:cam.py.zip|cam.py.zip}}, and copy it to the Raspberry Pi:
+<code>
+scp cam.py pi@raspberrypi:/home/pi
+</code>
+ \\
+=====Install PiCamera=====
+<code>
+ssh pi@raspberrypi
+sudo apt install python3-picamera
+</code>
+ \\
+=====Start Script=====
+<code>
+ssh pi@raspberrypi
+nano startcam.sh
+</code>
+Create the script "/home/pi/startcam.sh" with the following content:
+<code bash>
+#!/bin/sh
+cd /home/pi
+python3 cam.py
+</code>
+Make the script executable:
+<code>
+chmod +x startcam.sh
+</code>
+ \\
+=====Crontab=====
+Add the line "@reboot /home/pi/startcam.sh" to the crontab:
+<code>
+ssh pi@raspberrypi
+crontab -e
+no crontab for pi - using an empty one
+Select an editor.  To change later, run 'select-editor'.
+. /bin/nano        <---- easiest
+. /usr/bin/vim.tiny
+. /bin/ed
+Choose 1-3 [1]:
+</code>
+Close the nano editor with ctrl+x After edit to save the changes.\\
+Check if the changes are saved:
+<code>
+crontab -l
+# Edit this file to introduce tasks to be run by cron.
+#
+# Each task to run has to be defined through a single line
+# indicating with different fields when the task will be run
+# and what command to run for the task
+#
+# To define the time you can provide concrete values for
+# minute (m), hour (h), day of month (dom), month (mon),
+# and day of week (dow) or use '*' in these fields (for 'any').
+#
+# Notice that tasks will be started based on the cron's system
+# daemon's notion of time and timezones.
+#
+# Output of the crontab jobs (including errors) is sent through
+# email to the user the crontab file belongs to (unless redirected).
+#
+# For example, you can run a backup of all your user accounts
+# at 5 a.m every week with:
+# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
+#
+# For more information see the manual pages of crontab(5) and cron(8)
+#
+# m h  dom mon dow   command
+@reboot /home/pi/startcam.sh
+</code>
+Reboot the Raspberry Pi:
+<code>
+sudo reboot
+</code>
+ \\
+=====Boot speed=====
+Check the services which are not needed for the headless setup:
+<code>
+systemd-analyze blame
+</code>
+Google "raspberry zero systemd-analyze blame" to find tips, because this is a bit out of scope to include it in the Wiki.\\
+ \\
+=====Power consumption=====
+====HDMI====
+Running a headless Zero, there's no need to power the display circuitry.\\
+Add the following line in ''/etc/rc.local'' to disable HDMI on boot.
+<code>/usr/bin/tvservice -o</code>
+(-p to re-enable).\\
+Approximately 25mA reduction.\\
+ \\
+=====Special Boot Options=====
+To be able to use pin 27 and 28 as normal I/O, add an extra line in the /boot/config.txt:
+<code>
+force_eeprom_read=0
+</code>
+  * https://www.raspberrypi.org/documentation/configuration/config-txt/boot.md
+ \\
+=====Notes=====
+====SFTP File Transfer====
+WinSCP and FileZilla can be used for transferring files to and from the Raspberry Pi.\\
+For more information see:
+  * https://www.raspberrypi.org/documentation/remote-access/ssh/sftp.md
+====SSH====
+  * The terminal/console commands **ssh** and **scp** are available under Linux, Windows10 and Apple macOS.
+  * If "raspberrypi" cannot be resolved, "Could not resolve hostname raspberrypi", check the router and use the IP address instead: \\ {{:rocnet:cam:fritz.png?400}}
+====Wait for Network at Boot====
+Under specific network conditions, the following system option (sudo raspi-conf) must be activated, if the WIOpi or CAM does not start at boot:
+  * **1** System Options
+    * **S6** Network at Boot ((Select wait for network connection on boot))
+ \\
+====Disable screen saver====
+In case of a connected display, none headless, without user interaction.\\
+Edit the lightdm configuration:
+<code>$ sudo nano /etc/lightdm/lightdm.conf</code>
+find this section, and add the extra options:
+<code>
+[Seat:*]
+xserver-command=X -s 0 -dpms
+</code>