EDUP AX1800 installation: erase firmware

The Web UI Installation method prescribes:

  1. Apply update by uploading initramfs-factory.bin to the web UI.
  2. Erase firmware partition. # mtd erase firmware
  3. Apply squashfs-sysupgrade.bin in OpenWrt LuCI.

What is expected with the 2nd step? I actually ran the command and bricked the device: the web interface (LuCI) was gone in an instant, I could still ssh in but any operation returned I/O error and could not flash a firmware image...
Is a cheap device and put it in the trash bin, but... is the installation instruction valid?

What was the file name you uploaded?

not sure what you mean
I have successfully flashed the firmware: 1st step above. I will share the name of the .bin file I flashed when I get home. I downloaded it from https://openwrt.org/toh/sim/simax1800t

I went for 2nd step and bricked the device: that is the issue at hand

mtd ccommand has to be written without hashmark.

the mtd command was executed successfully and erase something... more like the entire system
This is why I am asking what is expected with this command
I have ordered another device and I will flash again the firmware (step 1). I will junp straight to step 3, skipping step 2
I was wondering whether you might know whether that might cause any issue (skipping step 2)

PS Later today I will post the file names of the files I plan on flashing

as mentioned, after executing the mtd command, the web interface could not be acceased: LuCI was gone
Still managed to ssh in
Tried uploding the firmware file to flash again.
scp failed with code 27.
I managed to download the firmware with wget which was still working
Tried flashing the firmware and got I/O errors: nothing worked
Frustrated, I rebooted the device: never started again
Finally put it in the trash bin

I am getting another one soon. I am just wondering what if I skip step 2

This is firmware I flashed: openwrt-23.05.4-ramips-mt7621-sim_simax1800t-initramfs-factory.bin

I did not get to the point of flashing: openwrt-23.05.4-ramips-mt7621-sim_simax1800t-squashfs-sysupgrade.bin

This is where I got the files from:

As much as you typed you skipped it already ( or really dont know whether you did it )

Just be more careful and accurate.

not sure what you mean by "you skipped it already"

Are you saying you reflashed factory after SSH and wget after you were already running OpenWrt (albeit with a borked LuCI)?

Or that you used the sysupgrade file?

In detail, what did you do (we can't guess)?

Let me try be as clear as possible:
I followed the step 1 and 2 indicated at https://openwrt.org/toh/sim/simax1800t, Web UI Installation method
That is, I flashed openwrt-23.05.4-ramips-mt7621-sim_simax1800t-initramfs-factory.bin
Rebooted, all worked just fine
ssh in the router as root and executed
mtd erase firmware
LuCI, the web interface was gone: inaccessible
It was clear the device is not working as it should
I tried flashing again to restore functionality, from the cli
Nothing worked. scp was failing with error code 27. I managed transfering openwrt-23.05.4-ramips-mt7621-sim_simax1800t-initramfs-factory.bin on the router with wget. I tried flashing but got I/O error
I power off and on the router and finally put it in the trash bin

Is that clearer?

never managsd to get to step 3 to flash openwrt-23.05.4-ramips-mt7621-sim_simax1800t-squashfs-sysupgrade.bin

Not really, but from your posts I assume:

  • the device booted into OpenWrt
  • the mtd command seemed to cause LuCI to stop working
  • you SSHed into the OpenWrt device, and then...what (to be clear, at the pont, you coulda try to download the sysupgrade file to /tmp and ran the sysupgrade command to flash)?

...you say you flashed something again?

  • What (since you say it wasn't the sysupgrade file)?
  • How did you do this flashing from the command line?
  • you SSHed into the OpenWrt device, and then...what (to be clear, at the pont, you coulda try to download the sysupgrade file to /tmp and ran the sysupgrade command to flash)?*

As I followed a Web UI installation method, I was expecting to continue to step #3 from the Web UI. Which was not available after executing mtd erase firmware
Is it an unreasonable expectation?

Starting with the WebUI installation method, I tried retoring the web UI by flashing again openwrt-23.05.4-ramips-mt7621-sim_simax1800t-initramfs-factory.bin
Which failed

...you say you flashed something again?
I did not manage to flash anything again
further command failed with I/O error messages
I tried
mtd -r write /tmp/temp/openwrt-23.05.4-ramips-mt7621-sim_simax1800t-initramfs-factory.bin firmware
failed with I/O error

See this (quite understated) warning message: https://openwrt.org/toh/sim/simax1800t#flash_layout

Perhaps another user can assist, maybe @frollic knows- he's edited the Wiki recently.

Wjom do i believe after 2x commented-out mtd erase command was "run"

Imma be honest, the Wiki is vague and cryptic here. Are you saying that some unposted procedure is necessary to install on an EDUP device - instead of mtd erase?