1

When resetting the device there’s an option to flash uboot via web interface but I’d like to be able to flash it from the command line, how can I do that?

2

on the bottom of this page, there is info about using command line.

One thing important, this is for GL.iNet6416 only!!!

For AR150, pls change the command to:

tftp 0x81000000 openwrt.bin
erase 0x9f050000 +0x7c0000
cp.b 0x81000000 0x9f050000 0x7c0000
reset

the 0x7c0000 is the size of your firmware, or it must be bigger than the size. You can use $filesize to replace this value, if you don’t see there is an error.

3

is it possible to do it when it’s not booted into console mode? I mean flashing uboot when the router is running normally. is there an ash command to do that?

4

Yes. It is using mtd tools.

https://wiki.openwrt.org/doc/techref/mtd

Not too much experience on this. But you can try it. uboot and art should be locked and it should be safe.