WR740N 20MHz channel limitation - 150 Mbps wifi missing

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cbaldan
DD-WRT User


Joined: 10 Sep 2010
Posts: 62
Location: Campinas, Brazil

PostPosted: Mon Jul 27, 2015 22:01    Post subject: WR740N 20MHz channel limitation - 150 Mbps wifi missing Reply with quote
I just flashed a WR740N v4.26 with 07-09-2015-r27506, but the wifi is limited to 72.2 MB/s.

According to the wiki, it happens due to lack of support to 40 MHz channel by DD-wrt.
http://www.dd-wrt.com/wiki/index.php/TP-LINK_TL-WR740N

Is this being tracked? Any possibility to have it implemented in the future?

Thanks.


Last edited by cbaldan on Tue Jul 28, 2015 3:18; edited 1 time in total
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tatsuya46
DD-WRT Guru


Joined: 03 Jan 2010
Posts: 3430
Location: Winnipeg, Canada

PostPosted: Mon Jul 27, 2015 22:29    Post subject: Reply with quote
look again, closer this time

wide ht40 (20+20mhz) not full (20mhz)..

_________________
LATEST FIRMWARE(S) || Qualcomm Atheros Wi-Fi Settings || Qualcomm Atheros Repeating

[QUALCOMM ATHEROS] TL-WDR4900 v1.3 --> DD-WRT v3.0-r27543 (07/27/15) std (private test)
[QUALCOMM ATHEROS] DIR-862L A1 --------> DD-WRT v3.0-r27543 (07/27/15) std (private test)
[QUALCOMM ATHEROS] WNDR4300 v1 ------> DD-WRT v3.0-r27543 (07/27/15) std (private test)
▲ ACTIVE / INACTIVE ▼
[QUALCOMM ATHEROS] WNDR3700 v1 ------> DD-WRT v3.0-r27506 (07/09/15) std
[QUALCOMM ATHEROS] DIR-825 B1 ---------> DD-WRT v3.0-r27506 (07/09/15) std

BrainSlayer wrote:
we just do it since we do not like any restrictions enforced by stupid cocaine snorting managers
cbaldan
DD-WRT User


Joined: 10 Sep 2010
Posts: 62
Location: Campinas, Brazil

PostPosted: Tue Jul 28, 2015 3:14    Post subject: Reply with quote
tatsuya46, can you advise me on this?

I tried both configs that are 40 MHz related available on the Wireless >> Basic Settings >> Channel Width dropdown:

* Dynamic (20/40 MHz)
* Wide HT40 (20+20 MHz)

But the Wireless Rate remains on 72.2 MB/s



Am I missing something on the configuration?
The router is being used as a Client AP, but the wifi performance is not being enough to my intent.



Regards,
Cleber.
Jack82
DD-WRT User


Joined: 26 Jan 2015
Posts: 55

PostPosted: Tue Jul 28, 2015 4:12    Post subject: Reply with quote
Use NG-Mixed. N-Only is broken on 2.4 GHz.
Also, Wide HT40 (20+20 MHz).
In Wireless Security -> WPA2 Personal & AES.
ginzon
DD-WRT User


Joined: 23 Jun 2014
Posts: 51

PostPosted: Tue Jul 28, 2015 5:13    Post subject: Reply with quote
Wide gives 150.. I've check that on my router as well.. BUt even I'm wondering why Full (20) isn't giving full 150 Question
_________________
TP-Link: TL-WR740N
Jack82
DD-WRT User


Joined: 26 Jan 2015
Posts: 55

PostPosted: Tue Jul 28, 2015 6:10    Post subject: Reply with quote
WR740N is only 1 antenna/stream.

HT20 & 1 stream = 72 Mb/s
HT20 & 2 streams = 144 Mb/s

HT40 & 1 stream = 150 Mb/s
HT40 & 2 streams = 300 Mb/s
HT40 & 3 streams = 450 Mb/s
st1000
DD-WRT Novice


Joined: 13 Aug 2011
Posts: 26

PostPosted: Tue Jul 28, 2015 7:57    Post subject: Reply with quote
try to change "Extension Channel" to "Upper"
tatsuya46
DD-WRT Guru


Joined: 03 Jan 2010
Posts: 3430
Location: Winnipeg, Canada

PostPosted: Tue Jul 28, 2015 9:15    Post subject: Reply with quote
ur in client bridge, then theres no problem here..if the host is not using ht40 the client (this router) obviously cant connect at ht40, get the host on ht40 if possible, then the ddwrt chan width setting will have effect as client (either use the ht40 from host or force urself down to ht20)
_________________
LATEST FIRMWARE(S) || Qualcomm Atheros Wi-Fi Settings || Qualcomm Atheros Repeating

[QUALCOMM ATHEROS] TL-WDR4900 v1.3 --> DD-WRT v3.0-r27543 (07/27/15) std (private test)
[QUALCOMM ATHEROS] DIR-862L A1 --------> DD-WRT v3.0-r27543 (07/27/15) std (private test)
[QUALCOMM ATHEROS] WNDR4300 v1 ------> DD-WRT v3.0-r27543 (07/27/15) std (private test)
▲ ACTIVE / INACTIVE ▼
[QUALCOMM ATHEROS] WNDR3700 v1 ------> DD-WRT v3.0-r27506 (07/09/15) std
[QUALCOMM ATHEROS] DIR-825 B1 ---------> DD-WRT v3.0-r27506 (07/09/15) std

BrainSlayer wrote:
we just do it since we do not like any restrictions enforced by stupid cocaine snorting managers
cbaldan
DD-WRT User


Joined: 10 Sep 2010
Posts: 62
Location: Campinas, Brazil

PostPosted: Wed Jul 29, 2015 0:39    Post subject: Reply with quote
tatsuya46 wrote:
the host is not using ht40


yeah, you are right.
The wifi comes from a modem/wifi router provided by the ISP and I can't change channel width there.

So, speeds over 72.2 MB/s only with 40 MHz channel, is that it?
tatsuya46
DD-WRT Guru


Joined: 03 Jan 2010
Posts: 3430
Location: Winnipeg, Canada

PostPosted: Thu Jul 30, 2015 4:53    Post subject: Reply with quote
cbaldan wrote:
tatsuya46 wrote:
the host is not using ht40


yeah, you are right.
The wifi comes from a modem/wifi router provided by the ISP and I can't change channel width there.

So, speeds over 72.2 MB/s only with 40 MHz channel, is that it?


for 1x1 yes

for 2x2 over 144.4 is ht40

for 3x3 over 216.7 is ht40

_________________
LATEST FIRMWARE(S) || Qualcomm Atheros Wi-Fi Settings || Qualcomm Atheros Repeating

[QUALCOMM ATHEROS] TL-WDR4900 v1.3 --> DD-WRT v3.0-r27543 (07/27/15) std (private test)
[QUALCOMM ATHEROS] DIR-862L A1 --------> DD-WRT v3.0-r27543 (07/27/15) std (private test)
[QUALCOMM ATHEROS] WNDR4300 v1 ------> DD-WRT v3.0-r27543 (07/27/15) std (private test)
▲ ACTIVE / INACTIVE ▼
[QUALCOMM ATHEROS] WNDR3700 v1 ------> DD-WRT v3.0-r27506 (07/09/15) std
[QUALCOMM ATHEROS] DIR-825 B1 ---------> DD-WRT v3.0-r27506 (07/09/15) std

BrainSlayer wrote:
we just do it since we do not like any restrictions enforced by stupid cocaine snorting managers
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