From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Greear Date: Fri, 22 Nov 2013 06:40:04 -0800 Subject: [ath9k-devel] AP Limitation because of ATH9K_HTC_MAX_STA In-Reply-To: <528F30B2.6000805@rempel-privat.de> References: <51DA79B6.8030702@djardin.de> <528D063F.5050008@candelatech.com> <528F30B2.6000805@rempel-privat.de> Message-ID: <528F6CC4.5080404@candelatech.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ath9k-devel@lists.ath9k.org On 11/22/2013 02:23 AM, Oleksij Rempel wrote: > Am 20.11.2013 20:01, schrieb Gustavo Azambuja: >> Ben, thanks for you reply. >> I need to convert my rPi into a AP (is not an option a "real" AP) to >> get at less 30 stations. You know some way to get a list of >> devices/drivers can support this? > > It's all about USB, RAM and power. > If you use usb to communicate with wireless hardware, then your first > problem is usb - it is too slow! Some times it is too slow even for one > connection. This is why we have usb wifi adapters with internal cpu, ram > and firmware (micro operation system). If you wont to add more > connections you will need more ram and may be more cpu power. This will > need more power from usb, which is limited to 500mA. > In this case, just take some AP, connect it over ethernet and you will > get same result. The RAM is certainly an issue, but just adding more stations should not have much CPU impact as the total throughput is unlikely to increase as more stations are added. Changing software to make better use of RAM is also unlikely to increase power usage, though adding more RAM to the hardware might. Out of curiosity, does anyone know how much RAM is on those adapters? Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com