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openwrt / mt76

mac80211 driver for MediaTek MT76x0e, MT76x2e, MT7603, MT7615, MT7628 and MT7688
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MT76 for CE? #238

Open jjliuhk opened 5 years ago

jjliuhk commented 5 years ago

I am working on a IOT project which is running on MT7688. It is running openwrt with MT76 driver. I wonder how can I set it to continuous transmission mode, and set different frequency, HT bandwidth, and mode for CE test on MT76 driver?

rettichschnidi commented 5 years ago

We faced the same problem a few weeks ago.

Everything you are asking is supported by the driver, except for the continuous transmission which we substituted by using using iperf3. To simplify the usage for the testers, we created a tool plus some documentation (which is not available online). It worked quite well for us and our MT7688 based device passed the EMC tests a few weeks ago.

rettichschnidi commented 5 years ago

Just in case you are interested in this too: We also passed the Wi-Fi Alliance certification using commit 6203d46fcc4577065209ea0ed9334d89df4f63f7

jjliuhk commented 5 years ago

Thx a lot. It helps so much.

BTW, did you use jtag to debug uboot? I refered to https://github.com/Angelic47/MT7688-OpenOCD/blob/master/debug.cfg but it fails to do "reset halt". I tried different combination on setting for reset but they didn't work.

rettichschnidi commented 5 years ago

@jjliuhk Nope, I never had had to debug U-Boot myself. We hired DENX (Stefan Roese) and he took care of everything we ever wished for. Was awesome, can highly recommend!

CodeFetch commented 5 years ago

@rettichschnidi Where can I find your U-Boot sources?

rettichschnidi commented 5 years ago

Everything we did is upstreamed by now. This should be a good starting point: http://git.denx.de/?p=u-boot.git;a=tree;f=board/gardena/smart-gateway-mt7688;h=25c42abc996573af9dc85251bc5f419072be5a8f;hb=HEAD

jjliuhk commented 5 years ago

@rettichschnidi Where can I find your U-Boot sources?

You may download it by cloning it from github. git clone https://github.com/MediaTek-Labs/linkit-smart-uboot.git

rettichschnidi commented 5 years ago

@jjliuhk The link you posted is based on a very old version of U-Boot (more than 10 yeards old). I suggest strongly to use the mainlined version for the MT7688.

Foeg commented 5 years ago

@rettichschnidi just wanted to contact you wrt your comment on wifi alliance certification. I note that the certification is for MT7688.

Just wondering did you certify at the chip level or did you happen to use the the 'linkit smart 7688' module?

jjliuhk commented 5 years ago

@jjliuhk The link you posted is based on a very old version of U-Boot (more than 10 yeards old). I suggest strongly to use the mainlined version for the MT7688.

Thank you for your advise. I am going to check it out.

CodeFetch commented 5 years ago

@Foeg You should really think twice whether you want/need your devices to be WiFi alliance certified. A certification for a wireless chipset is not possible. The whole system including the OS needs to act compliant to their standards. So far I have not seen a device that was really compliant and not using a reduced feature set. Since reading this article: https://www.smallnetbuilder.com/wireless/wireless-features/31743-bye-bye-40-mhz-mode-in-24-ghz-part-1 I don't care about certification anymore.

Foeg commented 5 years ago

@CodeFetch - you can certify a module and then reuse that module in products without having to recertify each product. Or specifically you can certify a module in a product and then use that certification in other products provided you use the same module etc.

Yes - its a pain, but we need homekit certification and a prerequisite for homekit cert is a wifi alliance cert.

CodeFetch commented 5 years ago

@Foeg Whether a device is compliant is also a question of software. I doubt that you can get a certification for a module/chipset. If you want to reuse the certification neither the hardware nor the WiFi driver part must have been changed. Many devices only get certified, because they restrict the chipset's functions in software. Actually I think that WiFi certification is only a marketing gag, but if you need it, give them some money.

rettichschnidi commented 5 years ago

@Foeg We are not using the linkit smart 7688. We have our own design, including our own, custom PCB antenna (nothing fancy). We did the WiFi-Alliance certification because of Apple HomeKit.

Be aware however: We got certified in 2018. Since the beginning of 2019, more strict rules apply. If you actually run into any problems I recommend to get a contract with @nbd168. My employer did exactly this and we saved a lot of money and time doing so.

rettichschnidi commented 5 years ago

@CodeFetch In our case the certification showed some problems in mt76 running on the mt7688 which we would not have noticed withouth it. Our product got undoubtably improved because of this testing.

Foeg commented 5 years ago

@rettichschnidi - wondering if you can email me on geoff@homeboy.com

rettichschnidi commented 5 years ago

For anyone else doing the Wi-Fi Alliance certification: Their current test suite will report a false false for the Security Validation Test "SVD-5.2.5":

Just to sum up the issue, the tool reports an IV reutilization, but that reutilization occurs AFTER a reassoc, so a new key is used and there is no security problem on using the same IV.

Our test house talked back to the Wi-Fi Alliance which acknowledged the problem and gave us a pass.