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"Best" SBC as WiFi access point


1llusion

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Hi,

 

I have currently a Raspberry Pi 3B+ running as WiFi access point, hooked up to the router via Ethernet. This allows me to play around and redirect traffic via TOR or whatever I can think of on the Pi. It works quite well, but I actually think the PI is possibly a bit overpowered and too expensive.

 

Can anyone suggest an SBC that can handle the task equally well (stable + good WiFi performance for a handful of clients with connection to 50MBit/s uplink) but is less expensive?

 

I already had a look at the Orange Pi Zero Plus 2, which seems suitable in terms of specs.

 

Thanks,
1llusion

Edited by 1llusion
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all those 1T1R wifi chips on 'cheap' SBCs won't perform that well when they should act as an AP.  I use normal routers, SBCs only when they have to be host for 2-3 ESPs (IoT stuff)..  

I don't think that there's a board in the 'sub 35$ range' which will perform significantly better as an AP (maybe one with an external antenna?). Is the 5GHz performing well in AP mode? 

 

 

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Seriously, you wouldn't get real "AP" performance in this price range. Even AP6356S on those RK3399 boards only perform around 80-100Mbps in AP mode, and the transfer rate drops to a very low value as you connect more clients.

The cheapest Armbian-supported (true) AP with acceptable performance may be an ESPRESSObin with a 2x2 QCA AP card (e.g. QCA9888) attached, it could be around 500-600Mbps, and supporting multiple concurrent clients at an acceptable speed as well. This costs around $50 (ESPRESSObin 1GB) + $50 (Compex WLE650V5-18) = $100

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38 minutes ago, hjc said:

cheapest Armbian-supported (true) AP with acceptable performance

 

I'll add 8814AU USB (USB3 or external powering might be needed) based wifi dongle with AP support here. Its performance is ofc worse than mPCI based Compex, but still, it performs reasonably well. You can't attach external antennas to this particular model (except if you DIY), but it cost only 23USD shipped. http://s.click.aliexpress.com/e/EyrJ6ai (I got mine even for a few USD less than this).

 

I haven't made a proper multiuser test, so I actually don't know how it performs with lots of clients. With a few, for SOHO usage, it works good enough.

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47 minutes ago, Igor said:

 

I'll add 8814AU USB (USB3 or external powering might be needed) based wifi dongle with AP support here. Its performance is ofc worse than mPCI based Compex, but still, it performs reasonably well. You can't attach external antennas to this particular model (except if you DIY), but it cost only 23USD shipped. http://s.click.aliexpress.com/e/EyrJ6ai (I got mine even for a few USD less than this).

 

I haven't made a proper multiuser test, so I actually don't know how it performs with lots of clients. With a few, for SOHO usage, it works good enough.

Interesting dongle. I read that rtl8814AU is capable of 5GHz AP, so it may be suitable for one of my side projects. Could you please share more info about its peak single user performance in a near distance?

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1 hour ago, hjc said:

Interesting dongle. I read that rtl8814AU is capable of 5GHz AP, so it may be suitable for one of my side projects. Could you please share more info about its peak single user performance in a near distance?

 

The main client is a notebook with Intel AC 7265 

wlp58s0   IEEE 802.11  ESSID:"ARMBIAN"  
          Mode:Managed  Frequency:5.2 GHz  Access Point: 40:A5:EF:D7:FC:DF   
          Bit Rate=866.7 Mb/s   Tx-Power=22 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:on
          Link Quality=56/70  Signal level=-54 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:20   Missed beacon:0

 

5m from AP
 

Spoiler

[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec  31.6 MBytes   265 Mbits/sec    0    612 KBytes       
[  4]   1.00-2.00   sec  30.0 MBytes   251 Mbits/sec    0   1022 KBytes       
[  4]   2.00-3.00   sec  29.3 MBytes   246 Mbits/sec    0   1.10 MBytes       
[  4]   3.00-4.00   sec  30.4 MBytes   255 Mbits/sec    0   1.29 MBytes       
[  4]   4.00-5.00   sec  29.7 MBytes   249 Mbits/sec    0   1.36 MBytes       
[  4]   5.00-6.00   sec  30.3 MBytes   255 Mbits/sec    0   1.51 MBytes       
[  4]   6.00-7.00   sec  29.9 MBytes   251 Mbits/sec    0   1.97 MBytes       
[  4]   7.00-8.00   sec  30.0 MBytes   252 Mbits/sec    0   2.07 MBytes       
[  4]   8.00-9.00   sec  28.2 MBytes   236 Mbits/sec    0   2.29 MBytes       
[  4]   9.00-10.00  sec  31.4 MBytes   264 Mbits/sec    0   2.67 MBytes     

 

Running speed test app on my phone (AC wireless) simultaneously.

Spoiler

[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[  4]   0.00-1.00   sec  13.5 MBytes   113 Mbits/sec    0    468 KBytes       
[  4]   1.00-2.00   sec  16.3 MBytes   137 Mbits/sec    0    711 KBytes       
[  4]   2.00-3.00   sec  17.0 MBytes   142 Mbits/sec    0   1.16 MBytes       
[  4]   3.00-4.00   sec  17.5 MBytes   147 Mbits/sec    0   1.61 MBytes       
[  4]   4.00-5.00   sec  16.9 MBytes   142 Mbits/sec    0   1.85 MBytes       
[  4]   5.00-6.00   sec  17.9 MBytes   150 Mbits/sec    0   2.05 MBytes       
[  4]   6.00-7.00   sec  21.6 MBytes   181 Mbits/sec    0   2.58 MBytes       
[  4]   7.00-8.00   sec  29.1 MBytes   244 Mbits/sec    0   2.58 MBytes       
[  4]   8.00-9.00   sec  29.9 MBytes   251 Mbits/sec    0   3.01 MBytes       
[  4]   9.00-10.00  sec  20.9 MBytes   175 Mbits/sec    0   3.01 MBytes  

 

 

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I checked your suggestions and would like to comment: The main purpose of the AP is to share an 50MBit/s internet connection; so I am not really looking for crazy speeds like the 600MBit/s boards you suggested. I do also like the idea of WiFi and Ethernet already being "on board" -- the possibility of an external antenna would be nice, though.

 

So I am open to more suggestions; or maybe someone has experience with the Orange Pi Zero Plus 2.. I've read mixed things about the WiFi performance and general stability..

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On 8/23/2018 at 10:49 AM, Igor said:

I'll add 8814AU USB (USB3 or external powering might be needed) based wifi dongle with AP support here.

the Asus version of it messed up my ubuntu (with 4.4 kernel)... :lol: But well, it was something like 3 times pricier... :rolleyes: at least they delivered a proper USB3 cable to get it away from the computer and it looks like it has 2 antennas.. Does your driver also end in a sluggish ssh connection? Mines is sluggish but a second ssh connection with something like ping running 'to keep it active the whole time' helps.

 

2 hours ago, 1llusion said:

I checked your suggestions and would like to comment: The main purpose of the AP is to share an 50MBit/s internet connection; so I am not really looking for crazy speeds like the 600MBit/s boards you suggested. I do also like the idea of WiFi and Ethernet already being "on board" -- the possibility of an external antenna would be nice, though.

 

The main problem is if your 1T1R wifi chip is able to deal well as soon as multiple clients are connected.. And well, that's probably something you've to test on your own due to the majority will have an AP for that.. 

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4 hours ago, chwe said:

Mines is sluggish but a second ssh connection with something like ping running 'to keep it active the whole time' helps

Well, my Intel 8275 also suffers from these kind of problems (on Debian stretch), and I guess it's related to firmware version and low power control.

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