Since commit 0b62fe5e OpenWrt can be installed using the EVA/Adam2 bootloader. Within the same HW revision 5 of the FRITZ!Box 3370 different NAND flash chips are used and the correct image has to be chosen. Please read the detailed commit message before trying an install.

Micron MT29F1G08ABADA NAND flash chip on AVM FRITZ!Box WLAN 3370

add picture of Hynix HY27UF081G2M NAND chip.

→ Install OpenWrt

First let's have a quick view at the Flash Layout with the stock firmware and after OpenWrt has been installed. When you later want to understand, what mtd/sysupgrade do, have a second look here:

• http://wiki.ip-phone-forum.de/software:ds-mod:development:flash#flash_partitionierung

Overview

→ EVA FTP install/recovery

Once a serial console has been established (see Serial for further details):

1. set your IP to 192.168.178.x (subnet 255.255.255.0)
2. power on FRITZ!Box
3. interrupt boot pressing a key
4. establish an FTP connection to 192.168.178.1
5. issue the following FTP commands:

ftp> quote USER adam2
ftp> quote PASS adam2
ftp> binary
ftp> debug
ftp> passive
ftp> quote SETENV linux_fs_start 0
ftp> quote MEDIA FLSH
ftp> put /path/to/openwrt-lantiq-xrx200-avm_fritz3370-rev2-micron-squashfs-eva-kernel.bin mtd1
ftp> put /path/to/openwrt-lantiq-xrx200-avm_fritz3370-rev2-micron-squashfs-eva-filesystem.bin mtd0

→ generic.sysupgrade

• Browse to http://192.168.1.1/cgi-bin/luci/mini/system/upgrade/ LuCI Upgrade URL
• Upload image file for sysupgrade to LuCI
• Wait for reboot

If you don't have a GUI (LuCI) available, you can alternatively upgrade via the command line. There are two command line methods for upgrading:

• sysupgrade
• mtd

Note: It is important that you put the firmware image into the ramdisk (/tmp) before you start flashing.

• Login as root via SSH on 192.168.1.1, then enter the following commands:

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

If sysupgrade does not support this router, use mtd.

• Login as root via SSH on 192.168.1.1, then enter the following commands:

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

→ generic.debrick

→ failsafe_and_factory_reset

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

Front:
Insert photo of front of the casing

Back:
Insert photo of back of the casing

Note: This will void your warranty!

Instructions found on BoxMatrix

• Remove the 2 rubber stands close to the wallmount holes, they hide 2 of the screws
• Open the 4 Torx 8 screws
• Lift the casing top carefully

Main PCB
Insert photo of PCB

→ port.serial general information about the serial port, serial port cable, etc.
→ https://www.zebradem.com/wiki/index.php?title=Serielle_Konsole for information specific to Fritz!Boxes

How to connect to the Serial Port of this specific device:

Seen from the rear of the device, the most right of the 4 holes is square cut while the others are round.

Insert photo of PCB with markings

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

How to connect to JTAG interface, and how to reflash the device with JTAG tools

How to connect to the JTAG Port of this specific device:

FriXtender - http://frixtender.de/

• Free DSP Compiler Available http://open.neurostechnology.com/node/1020
• AVM Wiki (de) http://www.wehavemorefun.de/fritzbox/Main_Page

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