Hacking the Silvercrest (Lidl/Tuya) Smart Home Gateway

So, As I guess, now I must make a dump of firmware to be able to replace root password. How can I do that?

P.S.
Found some docs here. But still need assistance.
https://openwrt.org/docs/techref/bootloader/realtek

P.P.S. Not sure is it useful

Besides the functions of the gateway networking SDK, the extended functions are as follows:

  • There are a large number of Zigbee sub-devices on the market, and Tuya Zigbee gateway cannot be compatible with Zigbee sub-devices of all manufacturers. Extended functions allow you to integrate third-party Zigbee sub-devices that are not compatible with the Tuya ecosystem.
  • Extended functions allow you to develop multi-protocol convergence gateways, such as Zigbee + 443, Zigbee + Z-Wave, and other multi-protocol combinations, and connect non-Zigbee protocol sub-devices to Tuya Cloud.
  • Extended functions allow you to develop multi-functional gateways to connect to peripherals such as night lights, siren alarms, and achieve multiple smart scenarios with sensors.