I can't enter U-Boot on this device. I've tried many different configurations (LAN cable connected/disconnected during reset, resetting with the reset button and the WPS button, pressing the reset button until all LAN LEDs turn off or the status LED changes between flashing red and blue) and with different manufacturer's firmware. My computer is set to listen to 192.168.1.1, but I see that the router simply boots into the manufacturer's firmware after a while.
I'd prefer not to connect via UART because if the firmware fails, I can return the device to the seller and get a refund.
maybe an interruption during the manufacturer update will corrupt the software and it will be possible to enter U-Boot?
Is there some manual or guide that says you can access U-Boot in the manner you described?
It sounds like you're purposely trying to void the warranty or brick your device.
Wait for next stable revision before flashing OpenWrt following fix for https://github.com/openwrt/openwrt/issues/21639
No need for uart https://github.com/openwrt/openwrt/commit/ff1419f895247a79e59a0fa63fe47f1583727674
If you damage uboot then uart will not help, just keep cats and dogs away when upgrading.
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