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    AR9280 vs AR9380 and antenna

    Scheduled Pinned Locked Moved Wireless
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    • ?
      Guest
      last edited by

      I use both of those modules and they are OK for use. AR5BXB112 would be a good cheap card. Don't worry about 3xMIMO as you can adjust the antenna settings under Wireless settings. pfSense can detect modules with 3X antenna jacks and you will see an extra antenna setting.

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      • S
        src386
        last edited by

        Ok, thanks.
        The AR9380 was cheaper, I'll buy it.

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        • GruensFroeschliG
          GruensFroeschli
          last edited by

          I drilled a third hole in the case on the side (top part).
          Handle the top carefully if you do this or you will rip off the hirose connector from the pigtail.

          The GUI of pfSense does not offer anything to configure the antenna settings for MIMO devices.
          The way it is done is for older device which are only able to do antenna diversity and not MRC (maximal ratio combining).

          If it were to support MRC, then you couldn't actually configure anything anymore besided how many antennas you want to use.

          We do what we must, because we can.

          Asking questions the smart way: http://www.catb.org/esr/faqs/smart-questions.html

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          • S
            src386
            last edited by

            @GruensFroeschli:

            The GUI of pfSense does not offer anything to configure the antenna settings for MIMO devices.

            Does that mean the bandwith is limited to 150mbps ?

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            • GruensFroeschliG
              GruensFroeschli
              last edited by

              No.
              By default everything is enabled.
              So you will get whatever maximum is possible.
              This might be interesting for you: http://mcsindex.com

              It's just not possible in the GUI to disable/force certain HT stuff.
              Please note that if you have 3 chains and only connect 2 antennas without telling the driver that you only have 2 antennas (which is not possible in the GUI), you will get slightly lower throughput (a few single digit % or so).

              Make sure you connect the antennas in the order of the chains.
              0 for 1 antenna
              0 and 1 for 2 antennas
              0, 1 and 2 for 3 antennas

              You will get a very bad link if you connect them differently.

              We do what we must, because we can.

              Asking questions the smart way: http://www.catb.org/esr/faqs/smart-questions.html

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              • S
                src386
                last edited by

                So I can achieve 300Mbps by connecting 2 antenna in the 0 and 1 connector on the wireless card.
                And if I add a third antenna I can achieve 450Mbps.
                Thank you.

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                • GruensFroeschliG
                  GruensFroeschli
                  last edited by

                  Yes.
                  But please be aware that 300Mbit means you will get a maximum of actually usable traffic of about 220 Mbit.
                  Always assuming you can do MCS15, HT40, SGI.

                  If there are other HT20 APs in the vicinity which operate on your HT40 sidechannel, the AP is not allowed to start HT40 operation and will stay on HT20.

                  We do what we must, because we can.

                  Asking questions the smart way: http://www.catb.org/esr/faqs/smart-questions.html

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                  • ?
                    Guest
                    last edited by

                    @src386:

                    So I can achieve 300Mbps by connecting 2 antenna in the 0 and 1 connector on the wireless card.
                    And if I add a third antenna I can achieve 450Mbps.
                    Thank you.

                    But then better as suggested, drilling a hole in the case and set up a third antenna to the card!
                    Why playing around and doing guesswork where you are able to fix it alone?

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                    • S
                      src386
                      last edited by

                      Hi,
                      I received my AR9380 and 2 antenna kit.
                      It's working but there are two flaws :

                      • I set the wireless interface in channel 100 (5GHz), I can see the SSID from my laptop, but not from my girlfriend's laptop. My guess is : her laptop is 2,4GHz only…

                      • On wireless clients, download is only ~50Mbps while upload is ~200Mbps ! My guess : that wireless card is not designed to act as an access point and offers asymetric bandwith :

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                      • GruensFroeschliG
                        GruensFroeschli
                        last edited by

                        How did you connect the antennas?
                        At which distance did you test this?
                        In what kind of an environment?
                        How did you test download/upload?
                        What kind of txpower do you have on both sides?
                        What system are you using on your laptop?
                        What card?

                        RF links are always reciprocal.
                        Otherwise you have found a way to break the physics and will get a nobel price ;)

                        We do what we must, because we can.

                        Asking questions the smart way: http://www.catb.org/esr/faqs/smart-questions.html

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                        • S
                          src386
                          last edited by

                          @GruensFroeschli:

                          How did you connect the antennas?

                          0 - 1
                          @GruensFroeschli:

                          At which distance did you test this?

                          1m
                          @GruensFroeschli:

                          In what kind of an environment?

                          Indoor.
                          @GruensFroeschli:

                          How did you test download/upload?

                          Online tool.
                          @GruensFroeschli:

                          What kind of txpower do you have on both sides?

                          There is no such option in pfsense, not for my card anyway.
                          @GruensFroeschli:

                          What system are you using on your laptop?

                          Manjaro.
                          @GruensFroeschli:

                          What card?

                          In the laptop ? I have to check that. But the problem is not located here.
                          @GruensFroeschli:

                          RF links are always reciprocal.
                          Otherwise you have found a way to break the physics and will get a nobel price ;)

                          I think that AR9380 is designed to be used in a laptop, where download is most important that upload. So it's probably designed that way.
                          When used has an acces point, that asymetric design is visible.

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                          • GruensFroeschliG
                            GruensFroeschli
                            last edited by

                            Believe me when i say that the 9380 is definitively not made for use in a laptop.
                            We make industrial access-points at our company and are using this chip.

                            Don't use an online tool to test throughput.
                            You need two PCs.
                            One on each side of the link.
                            Use iperf or similar to test throughput.
                            Ideally UDP to see how the link behaves.

                            The card in your laptop makes a huge difference.
                            How many chains does it have?
                            What are the settings on it? Does it work in HT40?
                            Since you are using Linux.
                            look at the output of "iw wlan0 station dump" when you are connected.
                            You will get lots of information.
                            similar to this:

                            root@RM2-TRE1:/# iw wlan0 station dump
                            Station 00:14:5a:02:30:98 (on wlan0)
                                    inactive time:  6280 ms
                                    rx bytes:      1330
                                    rx packets:    35
                                    tx bytes:      652
                                    tx packets:    4
                                    tx retries:    0
                                    tx failed:      0
                                    signal:        -72 [-72] dBm
                                    signal avg:    -72 [-72] dBm
                                    RSSI avg:      23  (assumed noise: -95)
                                    tx bitrate:    4.5 MBit/s
                                    rx bitrate:    4.5 MBit/s
                                    expected throughput:    0.347Mbps
                                    authorized:    yes
                                    authenticated:  yes
                                    preamble:      short
                                    WMM/WME:        yes
                                    MFP:            no
                                    TDLS peer:      no

                            (you might get less info, this is from a hacked driver/iw with some debug output added)
                            Please ignore the tx bitrate part. It only shows what the driver would like to send, not what it actually sends.
                            The interesting part is the rx bitrate.
                            It show what the last frame received was.
                            If you do throughput tests, look at what this is.

                            1m might be too close.
                            If you want to have multiple spatial streams you need enough reflections in the environment.
                            When the two endpoints are too close it can be that the cards are not able to find two transfer function for the space which are different enough for two streams.
                            You will see this in the rx bitrate of the iw output.
                            MCS0-MCS7 are a single stream. MCS8-MCS15 are two streams. MCS16 to MCS23 are three streams.

                            We do what we must, because we can.

                            Asking questions the smart way: http://www.catb.org/esr/faqs/smart-questions.html

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                            • ?
                              Guest
                              last edited by

                              I think that AR9380 is designed to be used in a laptop, where download is most important that upload. So it's probably designed that way.

                              This AR9380 is mostly soldered on industrial leading WiFi cards for gaining really high throughput and 3 x 3 MINO
                              so it could be that the power of this card would not be able to get out because of the usage in an Laptop.

                              Together with a MikroTik RB800 it will be a really great working WLAN AP.

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                              • S
                                src386
                                last edited by

                                No the problem is not with the online test tool. I can reproduce this anytime and when I use RJ45 or ISP' router the download is more important.
                                Unfortunately I still cannot have a 2.4G and 5G access point, so it's game over for me. I don't want to buy another card and drill holes and having millions antenna, I will have to find something else.

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                                • ?
                                  Guest
                                  last edited by

                                  Unfortunately I still cannot have a 2.4G and 5G access point, so it's game over for me. I don't want to buy another card and drill holes and having millions antenna, I will have to find something else.

                                  It come all to your budget! If you are willing to buy on or two lazy consumer router(s) and then flashing them
                                  with DD-WRT or OpenWRT, you will be only spending something around $30 - $60, but then they are VLAN
                                  capable and sorted with so many features like you will never need, but even also sorted with the actual bands
                                  likes a/b/c/g/n or ac. This would not be the real things to connect a router as a WLAN AP in my eyes.

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                                  • S
                                    src386
                                    last edited by

                                    That was the other option, but I'm not fond of those ARM things…

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                                    • S
                                      src386
                                      last edited by

                                      You may be right, I can reproduce this problem (upload more important than download) with my ISP's wifi.
                                      So it seems the problem is related to my netbook. That's weird. I should try with another Linux distribution, even with Windows.

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