hello all,
I am using openwrt buildroot chaos calmer branch for my xiaomi miwifi mini router.The wifi performance was really poor so I googled around and added the following line lines to XIAOMI MIWIFI MINI.dts file

pinctrl {
        state_default: pinctrl0 {
            gpio {
                ralink,group = "i2c", "rgmii1";
                ralink,function = "gpio";
            };
            pa {
                ralink,group = "pa";
                ralink,function = "pa";
            };
        };
    };

the pa section is what I added.That improved the performance of 2.4G a lot.But I am not getting  as much performance as a stock miwifi mini.is this a driver issue/bug? Do I need some separate driver? Really appreciate ur help

Thanks in advance

i can't understand wtf is going on with openwrt? first patch that added support for this router already had pa, then it disappeared from tree until Andrei sent it again to mailing list https://lists.openwrt.org/pipermail/ope … 5571.html. of course it wasn't included in time for CC final because someone thinks it won't work. so how it's possible OP ends up with a .dts file missing pa functionality?

while pa improved tx performance we still miss lna for rx performance.

Unfortunately, you are wright. However, I suspect, it is still missing because of "how to do it ?"

I would like to use this router in some production environment, but because of this issue, and
- no CE-cert
- arkward install of openwrt
no real perspective. May be, the source sells so many of these devices in China, no need to care about increasing sales :-)

exactly, Xiaomi is an A grade chinese brand and №1 in smartphone sells in China (№3 in the world with sells only in China, India, Malasya and Singapore). They have no reason to have any business with USA and Europe, while they have growing ~3 billion customers market.

(Last edited by stas2z on 20 Dec 2015, 14:42)

yes, that is the problem, MT7620 datasheet has no GPIOs listed for LNA. but i wonder what is the situation with other mt7620a routers? also a question is if the device use integrated or external LNA.

same goes for 5G MT7612E chip but at least there are known PA GPIOs, still looks like no one knows how to enable them.

When PA wasnt enabled, wifi was literally horrible...signal strength dropped to 3/5 bars in wifi strength indicator icon in the ubuntu UI while the router was sitting just beside the laptop.
Then after enabling the PA,signal strength increased dramatically.For getting an idea of signal strength,I used Wifi analyzer app in a galaxy Note 2.when around 2/3 feet away from the router,signal level stays at around -45dBm where with stock firmware it stays at -35dBm on average.Although sometimes the signal strength with openwrt goes at a higher level than that with stock firmware but that doesnt happen most of the time.I can guess from these results that this router can be a beast if wifi strength can be set properly.
I tried the rt2860v2 driver but ran into driver conflict issues(perhaps with rt2x00lib).

(Last edited by hrshovon on 20 Dec 2015, 16:22)

true. it can also do a lot more than 20dBm txpower on 2.4

https://github.com/wuqiong/rt2860v2-for-openwrt-mt7620
anyone tried this driver?

Hello all,
I wanted to know if 2x2 HT40 mode works on miwifi mini openwrt.Now um no expert on networking stuffs so dont know how to check that.
Thanks