Hi @arne_f
Thank you very much for your kind reply. I did not use the IPFire supplied u-boot as I am not aware and in fact I am totally new to IPFire and also the SBC world. I actually followed a post from IPFire:
to do the IPFire install to the NanoPi-R1. But the board came in with the eMMC corrupted so I have to erase the eMMC content and use the FriendlyWRT eflasher to reinstall the eMMC and also copied the u-boot (very old 201x version) u-boot-sunxi-with-spl.bin.
Can you advise where can I download the IPFire supplied u-boot?
I am attaching the photos (top and bottom) for your reference. It printed FRIENDLY ELEC v1.0 1809 so is this the first very old version?
I actually followed the post just mentioned and also bought the same Serial-TTL to USB-Cable but I could not get it work so I eventually open the box and use the internal port 3-pin and got the terminal working. So my question on this is does that I mean I have to always use the internal pin in the future (since I want to take it with me when I travel/work in public places).
Thanks a lot for your kind attention. (I already read a lot of your posts before I join this forum today). Thanks heaps!