I received some RAK811-HF modules with FW version: V3.0.0.14.H.beta1 and bootloader V 3.0.4, but none of them were officially published on RAKwireless download page.
Seems that there are two different RUI servers, one for firmware V3.0.0.14 and up ( http://18.166.76.71 ) and the “old one” for versions before ( http://47.112.137.11 ).
Yes, confusing, I wasn’t aware of this new repro, hopefully it will resolve some issues I’ve been having with RUI dev.
All I can suggest is that after some difficulties uploading firmware, we established that the boot loader needs to match up with the firmware series you are using.
I can’t speak directly for the RAK811, my issue was with the RAK4200:
I had boards with boot loader 3.2.6 but had to downgrade it to 3.2.3 - for which I used an ST-LINK.
No, you are overwriting the firmware with your own, it’s the boot loader you need to match up with the compiler.
At some point we may get told / have instructions for the 3.0.0.14 / 3.0.4 and the new compiler. But for now, using a similar pattern to my RAK4200 issue, I would refresh the boot loader to v3.0.2 from the download section and then use the old compiler.