Hi @Gingernut,
thanks for posting this. So do I get you right, you think it is the driver quality and not
a power source problem ? Power supply just delivers 1Amp at 12V. May be I'll try
another power supply and test again tonight just to be sure.
In case it was the software, may be the drivers included in the orginal firmware (which is an OpenWRT based thing) could be taken into an OpenWRT built, just to check if they run better.
3 Likes
There are posts that show how to include the OEM closed source wireless drivers but it's not a straight forward process.
I would suggest to repeat the iperf3 tests using the bidir command.
edit: You could also try playing around with interrupts as suggested here: https://github.com/openwrt/mt76/issues/391#issuecomment-615452348
# Set ethernet on CPU 2 (live core)
echo 4 >/proc/irq/22/smp_affinity
# Move mt76x2e 5GHz radio to CPU 1
echo 2 >/proc/irq/25/smp_affinity
6 Likes
Hi @Gingernut,
did not find the time yesterday. Going into iPerf3 it seems there are some specialities between Win- and Linux-Versions.
Windows Version does not seem to have '--bidir' option. I can just use '-R' = reverse.
Letting an iPerf Server run on the Router and let it send to the Client via Ethernet I get
[ 5] 0.00-10.04 sec 933 MBytes 779 Mbits/sec 0 sender
In non Reverse Mode over Ethernet (Laptop as Client and Router as Server)
[ 5] 0.00-10.05 sec 246 MBytes 205 Mbits/sec
Doing it the other way ... (Router is client and Laptop is Server)
[ 5] 0.00-10.01 sec 1.06 GBytes 911 Mbits/sec 62 sender
[ 5] 0.00-10.01 sec 1.06 GBytes 911 Mbits/sec receiver
In reverse mode
[ 5] 0.00-10.00 sec 251 MBytes 211 Mbits/sec sender
[ 5] 0.00-10.00 sec 251 MBytes 210 Mbits/sec receiver
Could be some funny wrong Windows Firewall Setting or the Router as 'Server' is slow.
With Wifi I just get a bad link channel today with 400MBit/s. It still shows the drop in link-speed down to 270MBit/s. In Reverse or normal client Mode and the Laptop being the server I get
[ 5] 0.00-10.00 sec 247 MBytes 207 Mbits/sec sender
[ 5] 0.00-10.00 sec 247 MBytes 207 Mbits/sec receiver
In the opposite setup
[ 4] 0.00-10.00 sec 270 MBytes 227 Mbits/sec sender
[ 4] 0.00-10.00 sec 270 MBytes 227 Mbits/sec receiver
1 Like
Thx for testing.
You should run iperf3 on the end systems and not on the router it self.
iperf 3.7 should have the -bidir function both on Windows and Linux builds afaik.
Pre-compiled iperf 3.7 for Windows:
1 Like
root@OpenWrt:~# iperf3 -c 172.28.10.203 -t 30 bidir
Connecting to host 172.28.10.203, port 5201
[ 5] local 172.28.10.76 port 42592 connected to 172.28.10.203 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 79.4 MBytes 663 Mbits/sec 0 215 KBytes
[ 5] 1.00-2.00 sec 73.8 MBytes 620 Mbits/sec 0 277 KBytes
[ 5] 2.00-3.01 sec 112 MBytes 939 Mbits/sec 0 475 KBytes
[ 5] 3.01-4.00 sec 111 MBytes 937 Mbits/sec 0 551 KBytes
[ 5] 4.00-5.01 sec 110 MBytes 918 Mbits/sec 0 642 KBytes
[ 5] 5.01-6.00 sec 111 MBytes 939 Mbits/sec 0 680 KBytes
[ 5] 6.00-7.01 sec 112 MBytes 938 Mbits/sec 0 714 KBytes
[ 5] 7.01-8.00 sec 111 MBytes 940 Mbits/sec 0 714 KBytes
[ 5] 8.00-9.01 sec 112 MBytes 938 Mbits/sec 0 714 KBytes
root@OpenWrt:~# iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 172.28.10.203, port 56652
[ 5] local 172.28.10.76 port 5201 connected to 172.28.10.203 port 56654
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 27.3 MBytes 229 Mbits/sec
[ 5] 1.00-2.00 sec 24.8 MBytes 208 Mbits/sec
[ 5] 2.00-3.00 sec 23.6 MBytes 198 Mbits/sec
[ 5] 3.00-4.00 sec 31.8 MBytes 266 Mbits/sec
[ 5] 4.00-5.00 sec 23.2 MBytes 195 Mbits/sec
[ 5] 5.00-6.00 sec 32.3 MBytes 271 Mbits/sec
[ 5] 6.00-7.00 sec 32.4 MBytes 272 Mbits/sec
[ 5] 7.00-8.00 sec 23.3 MBytes 195 Mbits/sec
[ 5] 8.00-9.00 sec 25.6 MBytes 215 Mbits/sec
[ 5] 9.00-10.00 sec 24.4 MBytes 205 Mbits/sec
[ 5] 10.00-11.00 sec 25.1 MBytes 211 Mbits/sec
[ 5] 10.00-11.00 sec 25.1 MBytes 211 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-11.00 sec 298 MBytes 227 Mbits/sec
iperf3: the client has terminated
These are my results from router (172.28.10.76) and to router with the previous snapshot. I will now upgrade to the latest version from yesterday
2 Likes
Okay... doing an 'iperf3 -c 192.168.1.1 -t 30 --bidir' from End System to Router I get
[ 5][TX-C] 0.00-30.00 sec 374 MBytes 105 Mbits/sec sender
[ 5][TX-C] 0.00-30.07 sec 374 MBytes 104 Mbits/sec receiver
[ 7][RX-C] 0.00-30.00 sec 598 MBytes 167 Mbits/sec 0 sender
[ 7][RX-C] 0.00-30.07 sec 597 MBytes 167 Mbits/sec receiver
including the drop from 400MBit/s link rate down to 300MBit/s when transferring something.
[I am afk now]
2 Likes
Hi @galotzas
may be I am doing something wrong but shouldn't you use '--bidir' instead ?
Then you should get another output like this?
[ ID][Role] Interval Transfer Bitrate Retr
[ 5][RX-S] 0.00-30.07 sec 444 MBytes 124 Mbits/sec receiver
[ 8][TX-S] 0.00-30.07 sec 506 MBytes 141 Mbits/sec 120 sender
Hey @makku71. Yes, you are absolutely right. I forgot to put the --
These are my new results
root@OpenWrt:~# iperf3 -c 172.28.10.203 -t 30 --bidir
Connecting to host 172.28.10.203, port 5201
[ 5] local 172.28.10.76 port 42604 connected to 172.28.10.203 port 5201
[ 7] local 172.28.10.76 port 42606 connected to 172.28.10.203 port 5201
[ ID][Role] Interval Transfer Bitrate Retr Cwnd
[ 5][TX-C] 0.00-1.00 sec 55.6 MBytes 467 Mbits/sec 0 551 KBytes
[ 7][RX-C] 0.00-1.00 sec 7.14 MBytes 59.8 Mbits/sec
[ 5][TX-C] 1.00-2.00 sec 18.2 MBytes 153 Mbits/sec 0 551 KBytes
[ 7][RX-C] 1.00-2.00 sec 22.1 MBytes 186 Mbits/sec
[ 5][TX-C] 2.00-3.00 sec 23.7 MBytes 199 Mbits/sec 0 609 KBytes
[ 7][RX-C] 2.00-3.00 sec 22.1 MBytes 185 Mbits/sec
[ 5][TX-C] 3.00-4.00 sec 23.3 MBytes 195 Mbits/sec 0 609 KBytes
[ 7][RX-C] 3.00-4.00 sec 22.2 MBytes 185 Mbits/sec
[ 5][TX-C] 4.00-5.00 sec 21.3 MBytes 179 Mbits/sec 30 434 KBytes
[ 7][RX-C] 4.00-5.00 sec 22.7 MBytes 190 Mbits/sec
[ 5][TX-C] 5.00-6.00 sec 14.1 MBytes 119 Mbits/sec 0 436 KBytes
[ 7][RX-C] 5.00-6.00 sec 22.1 MBytes 186 Mbits/sec
[ 5][TX-C] 6.00-7.00 sec 32.3 MBytes 270 Mbits/sec 0 543 KBytes
[ 7][RX-C] 6.00-7.00 sec 27.6 MBytes 231 Mbits/sec
^C[ 5][TX-C] 7.00-7.75 sec 22.9 MBytes 256 Mbits/sec 0 570 KBytes
[ 7][RX-C] 7.00-7.75 sec 21.4 MBytes 239 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID][Role] Interval Transfer Bitrate Retr
[ 5][TX-C] 0.00-7.75 sec 211 MBytes 229 Mbits/sec 30 sender
[ 5][TX-C] 0.00-7.75 sec 0.00 Bytes 0.00 bits/sec receiver
[ 7][RX-C] 0.00-7.75 sec 0.00 Bytes 0.00 bits/sec sender
[ 7][RX-C] 0.00-7.75 sec 167 MBytes 181 Mbits/sec receiver
iperf3: interrupt - the client has terminated
root@OpenWrt:~# iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 172.28.10.203, port 57140
[ 5] local 172.28.10.76 port 5201 connected to 172.28.10.203 port 57142
[ 8] local 172.28.10.76 port 5201 connected to 172.28.10.203 port 57144
[ ID][Role] Interval Transfer Bitrate Retr Cwnd
[ 5][RX-S] 0.00-1.00 sec 15.8 MBytes 132 Mbits/sec
[ 8][TX-S] 0.00-1.00 sec 43.5 MBytes 364 Mbits/sec 0 542 KBytes
[ 5][RX-S] 1.00-2.00 sec 27.5 MBytes 231 Mbits/sec
[ 8][TX-S] 1.00-2.00 sec 31.0 MBytes 260 Mbits/sec 0 573 KBytes
[ 5][RX-S] 2.00-3.00 sec 26.9 MBytes 226 Mbits/sec
[ 8][TX-S] 2.00-3.00 sec 32.2 MBytes 270 Mbits/sec 0 631 KBytes
[ 5][RX-S] 3.00-4.00 sec 23.4 MBytes 196 Mbits/sec
[ 8][TX-S] 3.00-4.00 sec 23.9 MBytes 201 Mbits/sec 0 631 KBytes
[ 5][RX-S] 4.00-5.00 sec 24.0 MBytes 201 Mbits/sec
[ 8][TX-S] 4.00-5.00 sec 21.6 MBytes 181 Mbits/sec 18 441 KBytes
[ 5][RX-S] 5.00-6.00 sec 25.8 MBytes 216 Mbits/sec
[ 8][TX-S] 5.00-6.00 sec 22.0 MBytes 184 Mbits/sec 0 477 KBytes
[ 5][RX-S] 6.00-7.00 sec 24.2 MBytes 203 Mbits/sec
[ 8][TX-S] 6.00-7.00 sec 19.9 MBytes 167 Mbits/sec 0 510 KBytes
[ 5][RX-S] 7.00-8.00 sec 25.8 MBytes 217 Mbits/sec
[ 8][TX-S] 7.00-8.00 sec 27.3 MBytes 229 Mbits/sec 0 583 KBytes
[ 5][RX-S] 7.00-8.00 sec 25.8 MBytes 217 Mbits/sec
[ 8][TX-S] 7.00-8.00 sec 27.3 MBytes 229 Mbits/sec 0 583 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID][Role] Interval Transfer Bitrate Retr
[ 5][RX-S] 0.00-8.00 sec 203 MBytes 212 Mbits/sec receiver
[ 8][TX-S] 0.00-8.00 sec 232 MBytes 244 Mbits/sec 18 sender
iperf3: the client has terminated
2 Likes
Uff, looks like I made the same mistake when testing 
3 Likes
i debrick it with method described here: power off router, hold reset, power on, look at dhcp receiver, change ip, and send 'test.bin' by tftp server.
May be 'test.bin' firmware was reject because its not for 3gv2 as you say. So thats why i got openwrt back...
But i can now connect to my router via luci, via ssh, but before it even ssh did not work. I mean i couldn't connect to any port.
Also can you write quick guide how to made stock firmware in my case? I'm not good at this stuff 
1 Like
This looks interesting!
Use google translate... That's what i did.
@ferogot @wimpie007 it's not possible to use these scripts when your router not running official firmware! owners of R3GV2 be aware before you flash openwrt you need to create a full backup from flash chip. then change the bootloader of your router after you change bootloader you can install any firmware you want and it is possible going back to stock firmware.
Also here is the updated scripts :
what's new:
5.start_download_openwrt.bat==> script will download latest snapshot into firmwares folder.
9.start_restore_backup.bat ==> rewrites the entire flash from data / backup.bin, including the bootloader and special sections.
older version with detailed guide is here:
5 Likes
Thanks Zorro!
does the start_create_backup.bat makes a correct/complete backup of the nand?
If i make a backup with it, and i fu&* up later on, i can restore it with the start_restore_backup.bat? (of course after the TFTP/bootp restore method to get on the official chinese firmware)
Is that tested?
Thanks for the great work!
1 Like
Used this to flash openwrt on my mi router 4a gigabit edition.So far so good.No problems faced.Just replaced the sysupgrade official firmware with the openwrt firmware renaming the file sysupgrade and followed the rest process......Easiest way till now.For me at least
1 Like
anyone knows what is the status of the snapshots for this device?
I have 2 new devices laying around, waiting for the right moment to be installed
1 Like
Yeah, i don't know wich version to flash either:)
choices... choices...
1 Like
Hi @rubee,
just to clarify:
-
Do I get you right you updated a Mi Router 4A Gigabit from
Stock Firmware 2.X.Y to OpenWRT Snapshot by "just" renaming
the OpenWRT into sysupgrade.bin or did you ... -
... use Zorros manual how to do it, two post before yours ?
1 Like
it worked for me i successfully restored my backup.bin the process takes 10-15 minutes...
does the start_create_backup.bat makes a correct/complete backup of the nand?
yes, it will create a full backup from flash chip including your router mac address...
2 Likes
how to flash openwrt with the latest scripts :
1-download openwrt put it in "firmwares" folder
2-run 0.start_main.bat enter the password of your router
3-finally run" 5.start_write_OS.bat" choose the firmware you want to flash it and be patient process will take 7-10 minutes
2 Likes