Short circuit to enter UART mode on Arcadyan ARV7519RW22-A-LT (Orange Livebox 2.1)

Installing and Using OpenWrt
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I hard bricked my Livebox 2.1 Arcadyan ARV7519RW22-A-LT (read below to know how, but not essential to solve this topic) and I am about to attempt entering uart mode by following:

That page says:
- boot_sel2 is at R148. Short circuit activates CFG 05 mode. (SPI flash boot).
- boot_sel0 is at R155. Short circuit boot_sel2 and boot_sel0 enters CFG 04 UART mode.

I think it means to short circuit twice simultaneously but separately, one between the two pins at R148 and another between the two pins at R155, because otherwise it would be needed to specify which of the two pins at R148 need to be shorted with which of the two pins at R155, but it would be nice to get a confirmation, as I am a bit scared of f***** up again.

Thanks

How I bricked the router:
I followed the instructions at https://openwrt.org/toh/arcadyan/arv7519rw22 but I got stuck at sending u-boot.bin via zmodem. It just kept giving error: file not found.
Aware that sending anything other that the correct file would hard brick the device I tried to cancel the operation. Ctrl+c, Ctrl+d did not work, so I turned off the router. I connected via serial again to verify that nothing had been changed. However for some reason unbeknown to me now the router is not booting at all, no light turns on, and terminal just outputs ROM VER: 1.0.5 CFG 01� repeatedly.
First hardbrick ever after many years flashing phones and routers.

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That means leave the short in place at R148 and also short the two pins of R155.
File not found error is local on your PC the terminal program can't open the file.

1 Like
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Thanks.
How is R148 already shorted?. If it is, shouldn't Picocom output be CFG 05 instead of CFG 01?

When I (shittily) short 155 the terminal does not output anything. But by shorting I mean pressing a 2cm wire copper tip against the two pads, so not sure if that's the problem. If I release it and open a new terminal "ROM VER: 1.0.5 CFG 01�" comes back.
I guess I will end up soldering a switch between the pads to be sure.

I made a screencast of my attempts with zmodem. The file existed on the linux computer, and I tested different paths.
https://www.mediafire.com/file/mufumtb0rool38c/uboot-zmodem.webm/file