Hello,

we are currently evaluating the CYW43907 Wi-Fi module for a VoIP like application, where a seamless roaming is expected.

And during the tests of our own roaming manager* we noticed a full second of packets loss during connection to the access point (using wwd_wifi_join_specific() to a specific AP).

After some packets sniffing we found out the problem.

See the captured packets:

While the WLAN module can manage an impressive 10 ms association time, there is a huge delay after the AP probe response, just before the association process, causing the packets loss.

Actually, the authentication frame transmit seems to be delayed by a CTS frame sent nearly one second after the probe response (while there is no RTS frame involved).

This CTS frame is sent by the CYW43907 module (checked with the signal power).

And, what is strange is the receiver address of this CTS frame:

while the two last digits of the MAC address are those of the module (5A:94), the OUI is now Broadcom (E0:3E:44) and not Murata (44:91:60).

Seems like a bug to us, we never saw this with others WLAN modules.

If this 1 second delay can be avoided, a VoIP roaming without any packet loss could be achieved.

Thank you for your help.

Hardware/software used:

CYW943907AEVAL1F kit

AP Unifi AC Pro (5Ghz band)

Wiced Studio 6.2

Wireshark 2.4.4 with WLAN sniffer

*: we don't use the automatic roaming feature of the chip because it leads to too much packets loss.

Hi,

I just download  Wiced 6.4(linux)  but when I try to compile any of the BCM943340WCD1 sources, for example "test.console-BCM943340WCD1", I found re-declarations and even an inclusion from another completely different platform "CYW943907AEVAL1F", anyone has any idea about this issue ?

$ ./make test.console-BCM943340WCD1

MAKEFILE MAKECMDGOALS=test.console-BCM943340WCD1 OTA2_SUPPORT is disabled

Building Bootloader

In file included from WICED/platform/MCU/STM32F4xx/../platform_button.c:40:0:

./platforms/BCM943340WCD1/./platform.h:259:5: error: redeclaration of enumerator 'WICED_GPIO_1'

     WICED_GPIO_1,

     ^~~~~~~~~~~~

In file included from ./include/wiced_platform.h:41:0,

                 from WICED/platform/MCU/STM32F4xx/../platform_button.c:39:

./include/../platforms/CYW943907AEVAL1F/platform.h:207:5: note: previous definition of 'WICED_GPIO_1' was here

     WICED_GPIO_1,

     ^~~~~~~~~~~~

In file included from WICED/platform/MCU/STM32F4xx/../platform_button.c:40:0:

./platforms/BCM943340WCD1/./platform.h:260:5: error: redeclaration of enumerator 'WICED_GPIO_2'

     WICED_GPIO_2,

....

Hello WICED forum,

mifo​ Thank a lot for helping me finding the option to post

My project is almost at the end stage, at this time I got struck with the problem of WiFi and BLE are not working together when enable together.

This is very unique selling point for this WiFi Combo devices and it is very annoyed that these are not working together.

Below is the details of the problem:

I'm using WICED Version: Wiced_006.002.001.0002. I enabled WiFi (STA) functionality and BLE (server, peripheral) functionality in my project. When the WiFi link goes down, the BLE connection also getting closed with my mobile.

how to reproduce ?:

- Enable both WiFi (STA) and BLE (server) interfaces in single project

- Let WiFi connect to a network

- At this moment the BLE is working fine, and I can able to connect to WICED board via my mobile with my custom applciaiton

- Now we need to make the WiFi link down, I did this by switching off my WiFi modem

- Surprisingly, the BLE connection also went down.

- When I made the link Up by switching ON my WiFi modem, the BLE started to advertise and connected

- In summary, I wanted to convey that when WiFi link down event occurs, then BLE connection will also be down.

Quickly reproduce with the BLE_WiFi_Introducer example present in the WICED studio.

- Just enable both WiFi and BLE stack as shown in the below snippet

- Allow WiFi to connect to a network (it must then alone we can reproduce)

- Make the WiFi link down, then BLE link will get disconnected.

Things tried so far:

- I tried to reinitialize the BLE stack when the WiFi link goes down, But not it is not working.

- There is no log when BLE connection goes down when enabled BT_USE_TRACES macro

Attachment: Shows the code to reproduce using BLE_WIFI_INTRODUCER example

Please help me in resolving this

Hi There,

Any one can provide an application note about how to enable the monitor mode of CYW4343W?

Currently, I am taking an project to use the monitor mode, however I encountered a problem about bus data credits runout problems, as I need to change the channels during the monitor procedure.