Manufacturers

Argon40

website: https://www.argon40.com/en-gb

Libre Computer

Odroid

website: https://www.hardkernel.com/

forum: http://forum.odroid.com/

Xu-4

wiki: https://wiki.odroid.com/odroid-xu4/odroid-xu4

manual: https://magazine.odroid.com/wp-content/uploads/odroid-xu4-user-manual.pdf

Power: 5V 4A 5.5x2.5 jack Serial: Speed: 115200; 8N1; Xon/Xoff

Pine64

website: https://www.pine64.org/

Rock64

website:https://www.pine64.org/devices/single-board-computers/rock64/

wiki: https://wiki.pine64.org/wiki/ROCK64

Quartz64

SoQuartz

Radxa

Raspberry

SB Components

Soerkris

StarFive

Turris

Website: https://www.turris.com/

Git: https://gitlab.nic.cz/turris

Forum: https://forum.turris.cz/

Mox

about: https://www.turris.com/en/mox/overview/

GPIO pinout: https://docs.turris.cz/hw/mox/hw/#gpio-pin-header

1.8v signalling

U-Boot on SPI

Waveshare