Posted: Mon Apr 13, 2015 15:46 Post subject: [SOLVED] Linksys E2500v3 boot loop / Serial Recovery
Hello,
I flashed my E2500 from stock to the dd-wrt.v24-23569_NEWD-2_K2.6_mini-e2500V3.bin after that i upgraded to dd-wrt.v24-25697_NEWD-2_K3.x_mega-e2500.bin.
Those two worked fine, and the router was ok.
After that i deployed my startup-script which creates a openvpn connection and some other stuff.
Since then im stuck in a boot loop.
The router returns 3 pings with ttl=100. So I tried flashing via tftp (from my directly connected ubuntu laptop).
Flashing the E2500 mini image seems to work, atleast i come back to the prompt without an error (using atftp, as discribed in the peacock thread). But the router just gets stuck afterwards. Every ping gets answered but the Webinterface is not reachable. When I reboot the device its again in the boot loop.
If i try to flash the stock firmware (through tftp) it transfers for a while and then quits with the error:
Code:
atftp --option "mode octet" --verbose -p -l 1.bin 192.168.1.1
Option mode = octet
Verbose mode on.
tftp: error received from server <transfer cancelled>
tftp: aborting
(1.bin is the stock firmware, just renamed it).
I also tried to telnet to the router during those first pings, but the connection gets refused.
Is there any option I didn't try? (I tried 30/30/30 several times, after flashing, before flashing etc. without any change of the behaviour)
Thanks alot
Chu [/i]
Last edited by Chu88 on Mon Apr 20, 2015 14:59; edited 2 times in total
I'm trying to do a serial recovery now.
I bought "USB PL2303 RS232 TTL" to connect my E2500v3.
But I am not 100% sure about the pins I have to connect. My multimeter told me the top Pin (most left if you look from the front) is the GND. I assumed the one next to it is N/A and then RX followed by TX. Since that is the order on a E2500v2.
But when i open an Putty Session on COM (COM 3 is the emulated Device) is get no Output. If i hit CTRL+C (like a madman) after turning the Device on also nothing appears / happens.
I Attatched 2 Pictures. There are 4 more connectors near the power switch. Is this the serial interface?
Edit: I found out that i get some output if I ONLY connect the TX-Cable. If i connect GND it stops the output.
Posted: Sat Jan 26, 2019 17:37 Post subject: Wrong pinout
Dude, you just costed me a Cp2102 module!, I know it's on me for trusting some dude on the internet, but you posted your pinout inverted! with pics and everything!
Go open your router, and check again, VCC and GND are inverted, and my Cp2102 went up in smoke!
Do you have any idea how long does it takes me to get a new one in this god forsaken part of the world? up to 3 months!
I guess I´ll just wait, and hope you correct that last pic of yours, for the sake of all the other noobs like me who trusted someone on a forum (no, I did not had a multimeter at hand at the time).
