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====== 2.1.2 Setup Operating System onto the Orange Pi 3 LTS ======

===== Foreword =====

The //Orange Pi 3 LTS// hardware looks to be an interesting and //available// Single Board Computer (SBC). See [[http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/details/orange-pi-3-LTS.html|http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/details/orange-pi-3-LTS.html]] for the hardware details.

[ i ordered from [[https://de.aliexpress.com/store/group/OPI-3-LTS-8GB-EMMC/1553371_30000000040035.html|https://de.aliexpress.com/store/group/OPI-3-LTS-8GB-EMMC/1553371_30000000040035.html]] with a plastic case for 50 EUR - including delivery in April 2022 ]


==== Not working builtin components ====

Be aware, that following things are **NOT** working with Linux:

  * Headphone Audio
  * MIC recording
  * TV-OUT
  * Mali GPU
  * Video codec

The info about that can be found - sort of hidden - in the [[http://www.orangepi.org/html/hardWare/computerAndMicrocontrollers/service-and-support/Orange-pi-3-LTS.html|User Manual]] in chapter 3.2 ''Linux4.9 kernel driver adaptation situation'' of the file ''OrangePi_3_LTS_H6_User manual_v1.0.pdf''. I realized that, when starting setup of Linux. \\ 
Happily, none of these are necessary for the FMLIST-Scanner.


==== Wiring ====

Wiring (ATX-buttons, LEDs or Piezo-buzzer) is tested meanwhile - but with **not so good** results:


== Output / LEDs ==

Using [[https://github.com/orangepi-xunlong/wiringOP|https://github.com/orangepi-xunlong/wiringOP]] can set output pins, e.g. LEDs. This does work.


== Tone output / Piezo buzzer ==

Ideally, this is done utilizing hardware PWM support - to save CPU interrupts.
But i could not find any GPIO pin, capable of hardware PWM.
Software/emulated PWM for the buzzer might work - haven't tested so far.


== Input / ATX-knobs ==

Sensing/reading GPIO input with internal pull-up/down resistors doesn't work with the WiringOP library.
This, ATX-button won't give correct state - without external resistors. See [[https://kalitut.com/raspberrypi-gpio-pull-up-pull-down-resistor/|https://kalitut.com/raspberrypi-gpio-pull-up-pull-down-resistor/]], how external resistor would need to be wired. I didn't try for now.

Upload of result - by pressing the button - won't work. \\ 
But, shutdown and reboot can be performed with the builtin //power switch//.

== Resume ==

Happily, at least for static (non-mobile) use, you won't need any of LEDs, buzzer or ATX-knobs.\\ 
Buzzer and LEDs are nice to see/hear some progress, but you can go mobile without .. and check progress through an internet connection over phone/tablet and WiFi.

==== Temperature ====

I would recommend some heatsinks for the CPU - as temperature does
temporarily rise over 80°C. \\ 
Ideally, i'd also suggest a CPU fan, but
couldn't find a suitable housing.


===== Download the image =====

Orange Pi does provide an //Ubuntu Image// for the //Orange Pi 3 LTS// , labeled ''updated: 2021-12-27'' at [[http://www.orangepi.org/downloadresources/|http://www.orangepi.org/downloadresources/]].

There is also a //Debian Image// ; but i did only try the Ubuntu one.

Following the //Ubuntu// download link to Google Drive, choose \\ 
''Orangepi3-lts_2.1.6_ubuntu_focal_server_linux5.10.75.7z'' \\ 
(as i did), cause the scanner doesn't need a desktop. 


===== Write to micro-SD card =====

Please follow the instructions in chapter 2 ''Instructions to use the development board'' of the user manual  to write the image to a micro-SD card.


===== First boot from micro-SD card =====

You should be able to boot and login with one of following user accounts as described in the user manual

^ User     ^ Password ^
| root     | orangepi |
| orangepi | orangepi |

i strongly recommend to change the default passwords!

Default hostname is ''orangepi3-lts''.

You should be able to connect with
<code>
ssh orangepi@orangepi3-lts
</code>

===== Flash image to eMMC =====

Follow the user manual chapter //3.33// to flash the image to the builtin ''eMMC'', to allow using the micro-SD card slot for writing scanner results. That is with the command

<code>
nand-sata-install
</code>

I would recommend to select ''f2fs'', the flash friendly filesystem, as target filesystem.

When finished, you should be able to boot without inserted //micro-SD card//.


===== System Update & Configuration =====

Please continue with [[fmlist_scanner:prepare_exisiting_linux_or_preinstalled_pi|2.2 Setup on a pre-installed Pi or PC]]