AVM FRITZ!WLAN Repeater 1750E

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→ Install OpenWrt (generic explanation)

Initial installation is done via FTP. You will need the following components to get started:

• A computer with ftp command line utility and Ethernet port.
• 1–2 Ethernet cable/s
• (recommended) Ethernet switch
• OpenWrt firmware image, e.g. openwrt-21.02.0-rc1-ath79-generic-avm_fritz1750e-squashfs-sysupgrade.bin

Please read through all steps before beginning the process and make sure you understand the procedure.

1. Connect your computer and the repeater to the Ethernet switch
   • If you have no switch at your disposal you can try a direct connection. It might be tricky though to persuade your computer into assigning the IP address in time to establish the FTP connection within the available time frame.
2. Configure your computer with a static IP address in the 192.168.178.0/24 subnet, e.g. 192.168.178.10
3. Plug the repeater into the power outlet and continue as soon as you see LEDs glowing on the device.
4. Connect to the repeater using the ftp command with its IP address 192.168.178.1.
   • On Debian (and many other Linux distributions) you can e.g. use ftp -pnvd 192.168.178.1. This will automatically activate debug and passive modes.
5. Execute the following commands within the FTP session:
   • Replace openwrt-21.02.0-rc1-ath79-generic-avm_fritz1750e-squashfs-sysupgrade.bin with the path to your upgrade image.
   • Make sure your OpenWrt image is in your working directory or, e.g., use the absolute path.

quote USER adam2
quote PASS adam2
binary
debug
passive
quote MEDIA FLSH
put openwrt-21.02.0-rc1-ath79-generic-avm_fritz1750e-squashfs-sysupgrade.bin mtd1

After you read 226 Transfer complete you can disconnect the repeater from the power outlet.

→ generic.flashing.tftp

→ generic.sysupgrade

cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
sysupgrade /tmp/xxx.abc

cd /tmp
wget http://downloads.openwrt.org/snapshots/trunk/XXX/xxx.abc
mtd write /tmp/xxx.abc linux && reboot

This section explains how to restore original OEM firmware if the device is flashed with OpenWRT or the firmware is bricked.

You will need the following items:

• A computer with Wine (wine32) installed (tested w/ version 4.0) and an Ethernet port.
• Ethernet cable
• AVM recovery utility (Download), e.g. FRITZ.Repeater_1750E-07.21-recover.exe

The following steps are necessary to restore your repeater:

1. Prepare your NetworkManager with a static Ethernet connection
   • Use a static IP address in the 192.168.178.0/24 subnet, e.g. 192.168.178.10
2. Keep the repeater off the power socket and connect the Ethernet cable with your computer
3. Run the recovery utility, e.g. by executing wine FRITZ.Repeater_1750E-07.21-recover.exe
4. Click “weiter” until a window pops up
5. Select your Ethernet adapter in the pop-up window (“übernehmen”) and continue with “ok”
6. The utility will now wait for the repeater to become available
7. Connect the repeater to the power outlet and as soon as possible select the prepared static IP profile with NetworkManager
   • The utility should log the process of deleting this and flashing that
   • After some minutes the repeater is restored and you can close the utility
   • (If the connection fails you can use an Ethernet switch as described in the OpenWrt install procedure above to get a steady connection)
8. The repeater can be unplugged from the power outlet and will boot OEM Fritz!OS next time it is connected

→ generic.debrick

Use the OpenWRT FTP install process or OEM Restore described above to restore the repeater if the firmware is bricked.

→ failsafe_and_factory_reset

→ Basic configuration After flashing, proceed with this.
Set up your Internet connection, configure wireless, configure USB port, etc.

→ hardware.button on howto use and configure the hardware button(s). Here, we merely name the buttons, so we can use them in the above Howto.

Front:

Back:

Bottom:

Backside label:

Note: This will void your warranty!

Main PCB:
Insert photo of PCB

→ port.serial general information about the serial port, serial port cable, etc.

How to connect to the Serial Port of this specific device:
Insert photo of PCB with markings for serial port

→ port.jtag general information about the JTAG port, JTAG cable, etc.

How to connect to the JTAG Port of this specific device:
Insert photo of PCB with markings for JTAG port

→ bootloader

None so far.

Space for additional notes, links to forum threads or other resources.

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