802.11ac 4x4 standard size mini pcie card is launched

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

Paul_Lai · October 13, 2021, 3:17am

This card is with 4T4R RF outputs in circuit too. Due to 2.4GHz and 5GHz can be combined in one RF outpupt. So 1x2.4GHz and 1x5GHz are combined to 1x(dual bands). Total are 2x(dual bands) outputs. Thanks for your asking!

Paul_Lai · October 14, 2021, 10:10am

DeadMeat · October 22, 2021, 3:41am

Just got one - going to test it.

alga_kbk · December 7, 2021, 5:41am

Hi Does this WIFI module support simultaneous AP & STA mode same time, be master and client at the same time.

frank-w · December 7, 2021, 7:15am

If you mean mesh point: yes

ericwoud · December 7, 2021, 10:57am

If you can do this

# iw dev wlan0 interface add wlan0_sta type managed addr 12:34:56:78:ab:cd  
# iw dev wlan0 interface add wlan0_ap  type managed addr 12:34:56:78:ab:ce

You can tell by:

iw list

Check: valid interface combinations:

See: https://wiki.archlinux.org/title/Software_access_point#L10

But sadly I do not own this card, so you need to find someone who can try this