Installing Armbian on Odroid HC4

[Roger]

Hello,
I just received my new Odroid HC4 and wanted to install Armbian on it.

I downloaded and decided to use the following image:
Armbian_24.2.1_Odroidxu4_jammy_current_6.1.77.img

I used two ways to flash the SD card
- Balnea echter
and also
- sudo dd if=Armbian_24.2.1_Odroidxu4_jammy_current_6.1.77.img of=/dev/mmcblk0

As recommended to bypass the bootloader petitboot I followed the recommended procedure:
**********************************************************************
Bootloader Bypass Method

This is now the preferred method. It is easier, and be performed
without
a display via SSH

Install an SD Card with a fresh Armbian image
Flip device upside down
With a tool, press and hold down the black button.
Continue holding button and plug in power to device
Login to console or SSH and perform follow normal setup procedures
Verify system can access SPI FLASH device and Erase
Reboot

odroidhc4:~:# ls -ltr /dev/mtd*
crw------- 1 root root 90, 0 Nov 6 21:38 /dev/mtd0
brw-rw---- 1 root disk 31, 0 Nov 6 21:38 /dev/mtdblock0
crw------- 1 root root 90, 1 Nov 6 21:38 /dev/mtd0ro
odroidhc4:~:# flash_erase /dev/mtd0 0 0
Erasing 4 Kibyte @ fff000 -- 100 % complete
odroidhc4:~:#
**********************************************************************
I could find the IP which was 192.168.1.80

But I see no open port using nmap even not the port 22, so I can not get into the system to use ssh for removing "petitboot"
Unfortunately I have neither a display nor a keyboard so I can not really see what happens.
I could not find any information on how long the black button must be hold so I tried few second up to more or less a minute with always the same result.
I'm not sure that the system boots from the SD cad when I press the button.

Any help or information what to do ?

[SteeMan]

Shouldn't you be using the odroidhc4 images?