I recently build TL-MR 3420 V3 firmware which was not yet supported by openwrt.
The board is very similar to V2 board but V3 is with new processor Qualcomm Atheros QCA9531.
My V3 Board specifics brief are as follows:
Qualcomm Atheros QCA9531 650MHz
25Q32CS1G 4M
Zentel A3S56D40FTP -G5 32 MiB
I started with TL-MR 3420 V2 profile.
“Target System” ⇒ “Atheros AR7xxx/AR9xxx”
“Target Profile” ⇒ “TP-LINK TL-MR3420 v2”
Build success without showing any error.
Then I tried to build from stock web based firmware upgrade but failed with error 18005 because of TP-Link genuine firmware check hash.
So, I tried with serial/tftp flash method and flashing "lede-ar71xx-generic-tl-mr3420-v2-squashfs-factory.bin" was successful . LEDE is booted checked from serial console.
Error : But when I check from serial console, ifconfig shows only lo interface. No Eth/Wan nor WLAN is up.
Tried ./etc/init.d/network reload and show error.
root@lede:/# /etc/init.d/network reload
Failed to connect to the switch. Use the "list" command to see which switches are available.
[ 56.975151] IPv6: ADDRCONF(NETDEV_UP): br-lan: link is not ready
'radio0' is disabled
'radio0' is disabled
Checked boot log and noticed errors.
[ 0.115999] ar71xx: invalid MDIO id 1
[ 1.414894] ag71xx ag71xx.0: invalid speed specified
[ 1.420074] ag71xx: probe of ag71xx.0 failed with error -22
[ 2.014883] ag71xx ag71xx.1: invalid speed specified
[ 2.020033] ag71xx: probe of ag71xx.1 failed with error -22
Seem Switch/Eth driver is failed to load. How can I add network support for my board. If someone has experience on this series, also let me know.
You can strip PPPoE support, that's a big chunk; also IPv6 if you do not need it.
If you want to strip either PPPoE or IPv6, make sure you deselect the top LuCI entry as well, so you can deselect LuCI's PPPoE support (and I think the same applies to IPv6).
[quote="oakkar7, post:4, topic:855, full:true"]like other 4Mib flash router, space left in overlay/roots_data lefts only 492k[/quote]you should be able to fit packages if you select them with "y" so they are integrated on build time. Build time integration compresses packages, 500k should be enough for luci and usb if integrated like that.
[quote]seem extroot is solution but I want to use 3G dongle for usb.[/quote]There are 3G/4G dongles with a microSD slot, you can do extroot there and be happy.
For example Huawei E3372h.
You can keep 3g/4g dongle tools in the extroot, as even if it does not detect the dongle's modem it will detect the usb storage on it fine, so it will extroot and then detect the modem too.
Finally, tried to manage packages to fit in 4MiB. After removing some packages, custom build firmware worked fine with V-3 hardware.
For those who want to try, I build two versions. One for standalone and another for extroot support. Both versions removed ipv6 and pppoe supports.
This version supports
Luci+bootstrap,
3G, usb, and
ext-4 file system. Like @bobafetthotmail said, this version can detect SD card inside 3G-dongle.
And I added mwan+luci-app-mwan3 for multi-wan support. Tested this also worked (Failed-over worked, load balancing is not tested)
Leaving about 104k space after flashed. Good point is you can still use extroot with this build (with ext-4, no vfat)
By the way, Dear LEDE admin and developers, LEDE aimed for flash at least 8MiB, right!. But the problem is these cheap routers with USB support only have mostly 4MiB. Pls also consider for devices with 4M flash for some transition time.
I like this 3420 router because this one is dead cheap and full featured. Some alternative like 3020 and 703 are also cheap but very small and no feature like eth-switch and little gpio.
So far so good but I would like to have my WN-722N supported so installing kmod-ath9k-htc_3.18.45+2016-01-10-1_ar71xx.ipk at the moment. Fingers crossed that everything works as expected on this lede-ar71xx-generic-tl-mr3420-v3-squashfs-factory.bin (luci-bootstrap-ext4-3g) ... No idea what this sysupgrade is, I am a total noob with openWRT... First contact today
Okay, I'm stuck. Have a couple of these routers running latest firmware: mr3420v3_eu_3_16_9_up_boot(160412).bin
Trying to upload any OpenWRT/LEDE firmware, tried every bin file I've found, but all result in Error 18005. Changed names, etc. Any ideas?
This router (TL-MR3420-V3) has two version ie EN and EU .
And code 18005 is the EU region code, but if you really want to try, I think you can try through serial (USB TO TTL)
To go back to the original mr3420v3 firmware (with stripped boot) is also included for convenience. (same procedure is needed as described here; https://wiki.openwrt.org/toh/tp-link/tl-mr3040 .. I tested it and this works)
@Dave_LB
I am sorry to update that this firmware bricked my brand new MR3420 v3!
The router has the power and LAN lights showing up correctly but no IP, SSH, telnet. I can't even get to fix it with TFTP.
Appreciate any help.
@Dave_LB
Thank you, the good news is I finally got to get back to factory through TFTP.
Emboldened, I am trying each of the builds here, but get a 18005 on all except yours - mine is EU
Thinking of another try with your build... it should work on EU, right?
Well.. I don't know.. I bought mine in the EU, Croatia to be exact.. But there is nowhere a sticker to be found that it's actually an EU model. So I am a bit confused about that. Does yours have it specified on the sticker?
(I actually ordered somebody else to buy this and didn't realize the antenna's on a V3 are designed to be permanent on this version. Wasn't amused with that discovery so I took a little saw to do some slight modification but it's not finished yet due to lack of pigtails...)
Mine looks exactly same, though I bought it in India. But it appears that it is not possible to downgrade or flash with a different firmware once the latest tp-link EU one is applied. I get a 18005 with any firmware now!
The site says:
Notes:
For TL-MR3420(EU)V3.
Your configuration will not be lost after upgrading this new firmware._
3.The EU firmware was specialized for CE certificating and can’t be downgraded to other version, please click here for choosing your region and selecting the most suitable firmware version to upgrade.
. LEDE is booted checked from serial console.
