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Foscam NVR FN7104W-B4 firmware dump

Discussion in 'Microcontrollers, Programming and IoT' started by kennyvn, Sep 17, 2021.

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  1. kennyvn


    Sep 17, 2021
    Hi all

    I'm having some firmware issues with my Foscam FN7104W-B4 NVR. It used to work flawless until it suffered from a power outage.
    Now it is stuck in a bootloop.
    When connecting to the device with uart i discovered the problem is a corrupt part in memory. It is unable to extract the rootfs.sqfs part of the firmware.
    I extracted it to my computer and it is realy corrupt. Unfortunately i am unable to extract this part from the latest firmware update and i can't use this firmare update file as is because it is packet for updating a working system.
    Is there anyone out there who can extract the firmware from a working device so i can program it to mine or is anyone able to extract the right part from the new firmware upgrade file?

    Any information is much appreciated

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