Performing Serial Recovery of Dynalink Router

#OpenWrt #Brick #Serial #Recovery
Let’s talk about the Cords
Set 1: (What I used & didn’t know worked until I used the second set & had the same issue
USB Serial Cord (Came with instructions for drivers & diagram of cord)
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USB Cord you can take the white clip from:
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Ste 2: (What I used on my second try, used in this video, more hassle with the wires then the first set, but worked)
USB Device with wires for serial connection to router
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REALLY IMPORTANT TOOL NEEDED: Thin metal clip, like ones used to pop out the SIM card trays in phones
Software needed: Putty www.chiark.gre...
Step 1: Take apart your router, it’s easy (4 screws at bottom, slide out inner case, pop black plastic holding antennas to white inner casing so you can get to all 4 motherboard screws, your done.
Step 2: DOWNLOAD the Kernel (.itb file for recovery), & the Factory image (.ubi file for installing openwrt on the router)
Link to Firmware Selector on Dynalink: firmware-selec...
Step 3: IMPORTANT with a FAT32 USB Device, copy the .itb file to it (Name it “Recovery.itb” like we did), & then plug the USB device AND Ethernet cord to router. This will save you A LOT of trouble later as slight movements can dislodge the serial cords once connected to router. Ethernet is connected from computer to router.
Step 4: Prep your cord for connection to router, if your using USB device we used in this video, Follow that part of my video showing me using metal clip taking plastic off cord example for you
Step 5: At this point, router should have recovery USB device with .itb file, the ethernet cord, & the power cord for the router plugged into router, but NOT the wall. This is so once you are ready, you just need to plug the wall outlet to power source without moving router. Now connect USB serial device to computer first, this will start the device’s installation for drivers which windows should automatically find. While that is going on, now connect serial wires to router, I strongly recommend having the RXD pin or middle wire keeping it’s plastic case attached to it to help you guide the two outer wires to prongs. YOU MAY HAVE TO JIGGLE WIRES A BIT BEFORE the PC get’s communication properly from router, but you won’t know until you open putty & turn router on.
Step 6: In putty, connect to proper COM serial, you should get a black terminal with NO input yet. Now finally, plug wall outlet for router’s power source in, router should be coming on & you should almost instantly within 3 seconds of plugging in router, start seeing output generated in putty. If router’s light comes on AND YOU DO NOT see any output whatsoever, jiggle cords a little bit (like the TX cord) until you see either garbled output on PUTTY, or clear text. Either is fine as the router will not continuously output info, so only feedback you will see is garbled text from the physical connections being made to pins on router’s mother board sometimes. YOU WILL BE spending sometime with this so be patient, jiggle a little, unplug power source, plug it back in, & check to see if you get output. Took me 10 minutes until it worked.
Step 7: Once you have clear output (Yay!), this is where YOU MUST PAY ATTENTION:
a. If output gets stuck at “S - Core 0 Frequency, 1651 MHz”, count to 21 seconds, & then begin typing the following SLOWLY so you do it right:
a. Type: "setenv console_unlock 1" & then press Enter
b. Then Type "saveenv" & then press Enter
c. The console should now be visible, showing what you are typing. IF THIS DOESN’T WORK, unplug router, & start over again counting to 21 seconds, it took me 3 tries before I got it right.
b. If your output goes straight to terminal output . . . you lucky dog.
Step 8: Now that you have the console, execute the following commands:
usb start
fatload usb 0:0 0x44000000 Recovery.itb
bootm
You should now see the router restarting, but booting into the OpenWrt firmware, you are now about to install OpenWrt.
Step 9: Execute the following installation commands, but pay attention to the output:
a. SCP the ubi file (Factory image) to the router
command when your in the folder on your computer: scp Recovery.ubi root@192.168.1.1:/tmp/
b. cat /proc/mtd
Make sure mtd18 & mtd 20 have the rootfs & rootfs_1 respectively, if not DO NOT CONTINUE
c. ubiformat /dev/mtd18 -y -f /tmp/Recovery.ubi
*IF you get a detach error for mtd18, execute this: ubidetach -m 18
d. ubiformat /dev/mtd20 -y -f /tmp/Recovery.ubi
e. ************************
f. IMPORTANT: Guys, I am sorry, youtube has a 5,000 character limit, go to my original installation video for Dynalink: • Installing Openwrt on ...
Look for Step 13 in the description, you JUST completed it, just follow the rest of the instructions form there & you should be good.
Step 10: Your Done

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