WL1805MOD: Throughput WL1805

carl vincent

Part Number: WL1805MOD
Other Parts Discussed in Thread: WL1835

We use the module with a WiFi access point type N SISO (TPLINK TL-WR702N) configured in AP 11n only 40 MHz - channel 1.
We perform iperf3 tests between 2 Windows computers connected with this access point.
=> The bit rates obtained are: client-> server: ~ 37 MBits / s; server -> client: ~ 40Mbits / s) which allows us to validate our environment.

In the previous manipulation, we replace one of the computers by our product (NXP Vybrid / Linux + Module WL1805).
=> The bit rates obtained are: WL1805 -> AP Wifi: ~ 12 Mbps; server -> client: ~ 40 Mbps).

We never manage to exceed 12Mbps in Iperf transmission with the WL1805 module.

=> Can you say what could limit the transmission rate?
=> How can one know in which mode MCS (processors.wiki.ti.com/.../WL18xx_TX_Testing) is the module at the time of the transmissions, a priori is not reassembled by the driver.

Brief description of our product:
- NXP Vybrid VF5XX platform + WL1805 module connected by SDIO interface
- Firmware: FW 8.9.0.0.78
- Driver: Linux 87016f5eb1a39251f982ae7a6f2843f82307ae47, which roughly corresponds to the TI SDK release 4.9.28

thanks

regards

Carl

over 6 years ago

0 Eyal Reizer over 6 years ago

TI__Mastermind 20285 points

Hi Carl,

You should get much better throughput then 12MBPs.
Are you using an optimized wl18xx-conf.bin?

Please check section 2 of the following link:
www.ti.com/.../swra489.pdf

Make sure you run the first time configuration script for generating the wl18xx-conf.bin that matches your hardware/module.

BR,
Eyal

0 carl vincent over 6 years ago in reply to Eyal Reizer

Prodigy 110 points

We think that our configuration file is correct (see pj.
Recall of our configuration (NXP Vybrid / Linux + WL1805 module in SDIO interface).
=> The bit rates obtained are: WL1805 -> AP Wifi: ~ 12 Mbps; server -> client: ~ 40 Mbps).
- Firmware: FW 8.9.0.0.78
- Driver: Linux 87016f5eb1a39251f982ae7a6f2843f82307ae47, which roughly corresponds to the TI SDK release 4.9.28
- configuration file: wl18xx-conf.txt / wl18xx-conf.bin

=> you will find in attachment the file of Logs reassembled by the interface of debug of the module (ifup_mc.csv)

For information, we have in parallel mounted a model with an evaluation board based on iMX6 (Saber) and module Wilink WL1835 interface SDIO
=> The bit rates obtained are: WL1805 -> AP Wifi: ~ 20 Mbits / s; server -> client: ~ 40 Mbps
- Firmware: FW 8.9.0.0.78
- Driver: Linux 87016f5eb1a39251f982ae7a6f2843f82307ae47, which roughly corresponds to the TI SDK release 4.9.28
- configuration file: wl18xx-conf.txt / wl18xx-fw-4.bin

=> you will find in attachment the file of Logs reassembled by the interface of debug of the module (ifup_sabre.csv)

Can this information be useful for understanding the low bit rates observed in transmission?

0 Eyal Reizer over 6 years ago in reply to carl vincent

TI__Mastermind 20285 points

Hi,

Can you share a picture of your setup and a picture showing the wl18xx module?

BR,
Eyal

0 carl vincent over 6 years ago in reply to Eyal Reizer

Prodigy 110 points

HIDownloads.zip

0 Eyal Reizer over 6 years ago in reply to carl vincent

TI__Mastermind 20285 points

I don't see a picture (photo) of your setup and the wl18xx module.
Can you share it?

Best Regards,
Eyal

0 carl vincent over 6 years ago in reply to Eyal Reizer

Prodigy 110 points

0 Eyal Reizer over 6 years ago in reply to carl vincent

TI__Mastermind 20285 points

Ok, now I understand your setup and it is actually very strange as I am not sure why it even works for you.
Seems like you are missing the wlan_irq gpio pin that should be driven directly from a host gpio.
Same for the wlan_enable gpio pin.

If you do:
ifconfig wlan0 down

followed by:
ifconfig wlan0 up

is all working ok?

Unless there is a flat cable connected on the other side of the module that I just don't see in the picture.

Please check the following link for an example of a similar setup:
processors.wiki.ti.com/.../WL18xx_First_Time_Getting_Started_Guide_(IMX6)

Can you verify that you have all setup correctly, hardware wise?

Best Regards,
Eyal

0 carl vincent over 6 years ago in reply to Eyal Reizer

Prodigy 110 points

I think you're right. The photo is incompleted. But the data rates (~20Mbits) observed with the evaluation board is acceptable with a SISO access point ( TPLINK TL-WR702N 11n-40 MHz - channel 1) .
Our problem is essentially to know the reason for the low data rate on our specific board (not on the eval board). Still fix under 12 Mbits/s.
Is there a way to know the MCS mode of the module? Can you find any information on the log file we send you few day ago?

thanks

carl

0 Eyal Reizer over 6 years ago in reply to carl vincent

TI__Mastermind 20285 points

Hi Carl.

Rate management is controlled internally inside the firmware running on the wl18xx chip and depends on the many variables (retries, PER, congestion etc.).

The only way to see what rates are really being used in the air is capture wifi traffic (such as during iperf UDP test) using a wifi sniffer (Wireshark, Omnipeek etc.)

I don't recall seeing such a log. Can you attach one?

BR,
Eyal

0 carl vincent over 6 years ago in reply to Eyal Reizer

Prodigy 110 points

here you are

http://filez.goobie.fr/ptwx820.

but please i hope/guess that this post is not public ?

thanks

Carl

0 Eyal Reizer over 6 years ago in reply to carl vincent

TI__Mastermind 20285 points

Hi Carl,

E2E is all open forums. anything posted here is public...

It seems like the capture you provided is on the Ethernet interface and not using a wireless adapter, as I don't see 80211 packets, such as beacons from the AP, WLAN data packets etc.

I need an air capture so we can look at the TCP packets that are seen on the air and check frame rates/re-transmissions etc.

Best Regards,

Eyal.