802.11ac 4x4 standard size mini pcie card is launched

frank-w · October 17, 2020, 10:06am

got a card (thanks to paul) and found a bit of time to insert it into my r2 and make a quick bootup

root@bpi-r2:~# dmesg | grep mt7615
[   11.234552] mt7615e 0000:01:00.0: enabling device (0140 -> 0142)
[   11.308282] mt7615e 0000:01:00.0: HW/SW Version: 0x8a108a10, Build Time: 20180518100604a                                                    
[   11.374026] mt7615e 0000:01:00.0: N9 Firmware Version: _reserved_, Build Time: 20200814163649                                               
[   11.405305] mt7615e 0000:01:00.0: CR4 Firmware Version: _reserved_, Build Time: 20190121161307                                              
root@bpi-r2:~# ip a                                                                                                                            
...
9: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000                                                         
    link/ether 00:0a:52:05:c9:e2 brd ff:ff:ff:ff:ff:ff                                                                                         
root@bpi-r2:~# echo 1 > /sys/kernel/debug/ieee80211/phy0/mt76/dbdc                                                                             
root@bpi-r2:~# ip a                                                                                                                            
...                                                                                 
9: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000                                                         
    link/ether 00:0a:52:05:c9:e2 brd ff:ff:ff:ff:ff:ff                                                                                         
10: wlan1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000                                                        
    link/ether 82:0a:52:05:c9:e2 brd ff:ff:ff:ff:ff:ff

Used firmware from here and copied it to /lib/firmware/mediatek and used 5.9-main

@nagi are the antenna-connectors defined to specific phy? Currently i have only connected wf0 and 2 phy (wlan0+1) can i use hostapd on both devices with 1 antenna (for testing)? Is wlan0 2.4ghz and wlan1 5ghz or reversed? Or can both bands assigned to both phy? How to set ht20 for 2g4 and vht80 for 5g?

nagi · October 26, 2020, 4:00pm

WF0-1 are for phy0, and WF2-3 are for phy1. You can only enable 2.4ghz on phy0, and 5ghz on phy1 simultaneously.

I think you can try to prepare hostapd_phy0.conf and hostapd_phy1.conf, and enable both of them

frank-w · October 26, 2020, 4:35pm

I guess (v)ht is enabled by these options in hostapd-config

hw_mode=a
ieee80211n=1
require_ht=1
ieee80211ac=1
require_vht=1

https://blog.fraggod.net/2017/04/27/wifi-hostapd-configuration-for-80211ac-networks.html

I’m confused why n is enabled for a mode…i guess i need to enable ieee80211n=1 and require_ht=1 on phy0 and require_vht=1 on phy1

moore · November 25, 2020, 12:23am

We are developing standard size mt7915 mPCIe card, and will be launched next month.

furumc · November 27, 2020, 7:37am

Hello moore,

would you mind telling me, is the standard size mt7915 mPCIe card launched yet?

frank-w · November 27, 2020, 4:33pm

Moore wrote lanch is next month…after that i guess it takes some time before start selling (manufacturing enough parts)

graphine · December 17, 2020, 1:59pm

Hi, is this the card you were talking about?

moore · December 18, 2020, 2:03pm

Yes, we can get sample next week and start the test, thanks.

frank-w · December 23, 2020, 1:49pm

i tested dbdc after reboot (anywhere it was stated it does not work and needs a poweroff, did not found the thread) on my r2 with this card (mt7615 standard size).

i can boot 5.10.0-main (see wlan0 only), enable dbdc

echo 1 > /sys/kernel/debug/ieee80211/phy0/mt76/dbdc

see now wlan0 and wlan1. now reboot (no poweroff) to same kernel, did same steps with same result

my 5.10-main is only modified to add the eeprom-file patch…

Edit: found article with reboot-problem with dbdc:

shuky · December 23, 2020, 5:41pm

hm,is this card is 4x4:4 MU MIMO OFDMA ? how so that it is only 2401Mbps, is it combined speed of 2,4 and 5G? thnx can you please explain this: is it SU-MIMO or MU-MIMO? " MU-MIMO configurations of

4 users: 4*1ss
3 users: 2 1ss + 1 2ss or 3*1ss
2 users: 2 2ss or 1 1ss + 1 2ss or 2 1ss"

i " * 4T4R with support of up to 2401Mbps PHY rate

Configurable 4×4/3×3 or 2x2n+2x2ax DBDC"

graphine · December 23, 2020, 5:43pm

I believe @moore can give more details.

moore · December 23, 2020, 11:37pm

Yes, it is mt7915a dualband selectable MU-MIMO card which can work at 4x4 2.4G (1200Mbps) or 4x4 5G(2400Mbps). If you use R64 with one 7915 card, it can become ax3200 router because 7622 has builtin 2.4G 4x4n (800Mbps) + 5G 4x4ax 2400Mbps=3200Mbps.

https://www.acwifi.net/11414.html

For dualband concurrent mode, mt7915d can be configured as 2x2 5G(1200) + 2x2 2.4G(600). It means we can have ax1800 concurrent router by only use 1 pcie slot.

AsiaRF has plan to have such card in the future. (chip is mt7915d with different pcb board)

moore · January 7, 2021, 8:51am

Update progess… Just got sample and under test…

moore · January 14, 2021, 8:08am

Update RvR (Rate vs. Range) test result

graphine · March 30, 2021, 8:30am

I received my card with a metal shield. I was planning on adding radiators to the 2 chips on the board.

Is the shield for cooling purposes or it helps with interference?

moore · March 30, 2021, 12:46pm

It can reduce interference and it is ok to add heatsink on it, thanks.

bjlockie · May 15, 2021, 7:30pm

What about antennas for the wifi chip?

moore · May 16, 2021, 11:20am

Paul_Lai · October 11, 2021, 3:15pm

hi, DBDC is available now.

welcome to try it.

ericwoud · October 12, 2021, 3:51pm

It is only 2T2R, the other MT7915 card is 4T4R… I almost ordered 2 but then I saw it. Hmmmmz

1800Mbps with DBDC vs 2400Mbps without DBDC