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IP Camera - Ambarella A5s: How to access bootloader

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  • IP Camera - Ambarella A5s: How to access bootloader

    Hello,

    I got a Smart Home IP Camera with an Ambarella A5s SoC on the PCB. I already found an UART interface with shows during startup a linux boot log. The first output is the first line of a linux boot process. I now want to access the bootloader to change the linux boot commandline.

    I tried (with not success):
    - Pressing ENTER during reboot and also possible other keys like ESC, F1 ...
    - Shorting RX/TX
    to access the bootloader AmBoot (i guess that one is - not output from AmBoot during startup).

    Are there other ways of accessing the bootloader of an Ambarella A5s SoC?

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