Installing on Fritz Box 7530

Installing and Using OpenWrt
1

Hello everyone,

I have been trying to flash my Fritz Box 7530 according to the official guide, but somewhere between transferring FRITZ7530.bin via tftp and copying U-boot and sysupgrade using scp I get stuck.

I set up tftp usding tftp-server on fedora, set the IP address of my pc, eva_ramboot.py gave the expected output and Wireshark shows FRITZ7530.bin getting transferred.

I've read, that at this point the power led is supposed to flash a few times and as soon as it is on continuously, OpenWRT should be booted into ram. But on my router it never starts flashing, it stays on all the time.
It also asks for FRITZ7530.bin repeatedly, that doesn't feel right?

Thanks for any help

2

Where have you read this? I can't find it in the linked guide.

Could you maybe post the complete error message(s)?

3

I misremembered, it was in another guide, but I did use the official one until I ran into this problem. The important part translated to english:

Now change the computer's IP address to 192.168.1.70 with a subnet mask of 255.255.255.0. Optionally, launch Wireshark, unplug the LAN cable, plug it back in, and check whether TFTP packets are being successfully exchanged via Wireshark. If successful, the Fritzbox’s power LED will flash again and then remain lit. OpenWRT should now be in RAM. Next, use scp to load the u-boot-fritz7530.bin and avm_fritzbox-7530-squashfs-sysupgrade.bin flash files onto the Fritzbox:[...]

Of course. I'm not sure how to format this, I hope it's readable.

Source Destination Protocol Length Info
AVMAudiovisu_bd:11:92 Broadcast ARP 60 Who has 192.168.1.70? Tell 192.168.1.1
BizlinkTechn_ae:5e:bf AVMAudiovisu_bd:11:92 ARP 42 192.168.1.70 is at 0c:37:96:ae:5e:bf
192.168.1.1 192.168.1.70 TFTP 87 Read Request, File: FRITZ7530.bin, Transfer type: octet, timeout=5, blksize=1468
192.168.1.70 192.168.1.1 TFTP 67 Option Acknowledgement, timeout=5, blksize=1468
192.168.1.1 192.168.1.70 UDP 60 3281 → 51292 Len=4
192.168.1.70 192.168.1.1 TFTP 1514 Data Packet, Block: 1

[...]

Source Destination Protocol Length Info
192.168.1.70 192.168.1.1 TFTP 1256 Data Packet, Block: 6132 (last)
192.168.1.1 192.168.1.70 UDP 60 3281 → 51292 Len=4

After a few seconds it repeats and never stops. I've had it running for ~10 minutes.

4

A possibility (not saying that's what it is for sure) is that your device might have too many bad blocks marked on the flash. When that happens there's basically nothing you can do only the original firmware works and flashes on.

Is this brand new or did you buy it used ?

5

Which files did you use?
The ones linked in the german article or the ones linked in the official OpenWrt guide?
Because the prior ones may be much too old...

6

sometimes changing ethernet adapters or the tftp server can help

e.g if you have a usb ethernet adapter lying around try connecting to the 7530 directly that way

you can try using dnsmasq for the tftp server, it's pretty easy to get going and that's usually what I use