Posted: Fri Feb 07, 2020 23:14 Post subject: Re: Unsuccessful Trendnet TEW-811DRU AC1200 upgrade
aps_ddwrt wrote:
It powers up showing normal LED lights
-power light
-5G light
-2.4G light
-4 ports will light up when plugged/unplugged
Sometimes can see a quick port flash once or twice when pinging it but not the normal port activity flashing LED
I tried using the reset button and powering off/on - no joy
The router does have a USB port and was hoping I could use that to downgrade the firmware
on bootup somehow? but haven't found any info about using the usb port for this.
No, USB ports have no use for recovery. Just need a LAN port; TFTP should work fine. Or does this model have a bootloader recovery mode (it's usually to hold the WPS button at powerup for a bit)? Looks like the default CFE IP is 192.168.10.1. _________________ #NAT/SFE/CTF: limited speed w/ DD#Repeater issues#DD-WRT info: FAQ, Builds, Types, Modes, Changes, Demo#
OPNsense x64 5050e ITX|DD: DIR-810L, 2*EA6900@1GHz, R6300v1, RT-N66U@663, WNDR4000@533, E1500@353,
WRT54G{Lv1.1,Sv6}@250|FreshTomato: F7D8302@532|OpenWRT: F9K1119v1, RT-ACRH13, R6220, WNDR3700v4
The serial flash chip is a Macronix MX25L6406E. I have experience pin shorting recovery with my Netgear WNR3500v2 which uses a similar Macronix chip. The pins that needs to be shorted are:
5 SI/SIO0
6 SCLK
The hassle is the serial chip is on the backside of the PCB, so it needs to be completely disassembled and removed from the case to be shorted. After shorting, the router responds to ping at 192.168.10.1 and there's also a TRENDnet Emergency miniWeb Server at http://192.168.10.1/. Use that web page to upload the original Trendnet firmware. tftp might be possible. Didn't test.
I saw this post a couple pages back on page 4 by SleepyBumand hoping someone can explain about "shorting the pins" to bring back the Emergency Web Server?
Does this mean short the 2 pins together before powering on the router and leave them shorted together? Or just shorting them together temporarily after booting?
Posted: Tue Mar 10, 2020 17:34 Post subject: Re: Anyone know the most current stable build is for this ro
captdave wrote:
Currently running DD-WRT v3.0-r31825 mini (04/06/17)
I am hoping to use OpenVPN but the build I have doesn't seem to have OpenVPN settings available
I don't think you'll find OpenVPN with only 8MB flash, but the latest build is only ~5.47 MB (5734420 bytes), so maybe entware on jffs (or with a USB drive and manual configuration) would work.
That said, it seems there hasn't been an 811DRU report since 36330, but the latest builds have generally been good. _________________ #NAT/SFE/CTF: limited speed w/ DD#Repeater issues#DD-WRT info: FAQ, Builds, Types, Modes, Changes, Demo#
OPNsense x64 5050e ITX|DD: DIR-810L, 2*EA6900@1GHz, R6300v1, RT-N66U@663, WNDR4000@533, E1500@353,
WRT54G{Lv1.1,Sv6}@250|FreshTomato: F7D8302@532|OpenWRT: F9K1119v1, RT-ACRH13, R6220, WNDR3700v4
So what is the currently recommended version of DD-WRT to install on this router? I just went through a whole ordeal because I installed one from the Router Database (I didn't even know about this forum before and assumed the official website was a good source).
Was only able to recover after shorting the pins and getting the emergency web server, through which I could flash the default firmware.
Posted: Sun Sep 20, 2020 2:35 Post subject: issue after flashing to latest release
Hello All,
I flashed my tew 811dru v1 router using build 40559. After doing the flash my router now behaves as a dumb layer 2 switch. I do not get any layer 3 functionality or wi fi connectivity. I tried various default IP addresses and to no avail I cannot get to the admin page or ping it with the various default gateways I configured. I did not reset to factory default after flashing, hope that did not brick it. Although I can say its not bricked as it is functioning at the layer 2 level. I tried to use another router with layer 3 working to see what its ARP table picks up. Unfortunately I do not see the router's MAC address at all. I am assuming the router is just acting as a layer 2 pass through switch. I know this is a lot to digest but if anyone here has a way to fix this I would gr8tly appreciate it.
Posted: Sun Sep 20, 2020 22:41 Post subject: issue after flashing to latest release
OK only problem is I cannot access the device anymore after flashing. Not sure if device has old IP or a default one. I cannot tell either as there is no dhcp being done. does anyone one know of this happening after flashing. By this I mean having device become layer 2 dum switch, rather than router?
I had the same problem about two months ago when the previous post was written. Like others, I flashed the 40559 build and it bricked my trendnet 811 router. I then put it away as I wanted to try one more time to check it for life before tossing it in the trash. Today, I was able to get a ping response back from it on the web recovery ip of 192.168.10.1. I am not sure what I did or if it was a combination of two things:
First, I removed the board from the box and shorted the two pins shown in this thread several pages back.
Second, and most importantly, I got an immediate ping response back when I started pressing the reset and WPS buttons together, individually, short pushes, long pushes, etc. It was my last ditch effort to make it work before the trash can. I had nothing to lose so I was just trying to wake the thing up and get some life out of it.
It worked, and I tftp(ed) the original stock firmware onto the router. I am now back where I started and can read more on just which dd-wrt version I should try, or stay with stock.
This was a cheap router I purchased almost 6 years ago as a backup and has been sitting in a cabinet unopened until recently. I learned some things by bringing this thing back to life, and it was fun.