Apparently I don't have to retire my #odroidc1. After message from @kuleszdl I looked a bit more and searched Archlinuxarm once again and found a #odroidc1 5.7.2 kernel. http://linux-meson.com/doku.php has more info. With the connected serialToUSB converter I could fix 2 issues. The device tree could not be loaded → "cp /boot/dtbs/meson8b-odroidc1.dtb /boot/dtbs/meson8b_odroidc.dtb" and in /boot/boot.ini → "setenv condev "console=ttyAML0,115200n8 earlycon"
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