Hi Sir,

We use CYW43438 as softAP with dhd driver, and use smart phone as client, and their distance around 5m.

Firmware version: bcm43438-7.46.58.11

While doing ipef throughput test, throughput will keep 1x Mbps around several seconds in channel 1 or 11, then down to 0 Mbps.

We have to disconnect and re-connect for recovery.

For same test in channel 6, it seems testing good, but only keep normal around several minutes.

What could we do to keep throughput test stability in AP mode?

Hi Sir,

We try to use Azurewave CYW43455 module in Sigmastar platform with FMAC driver.

But it always show error message as below while we run ping or hostapd function. 

1. cfg80211: failed to load regulatory.db  ==> Already put the clm_blob file, it still happened.
2. [sdmmc_1] Err: #Cmd_52 (0x92003E01)=>(E: 0x0008)(S: 0x00001002)__(L:1065)

Do you know what causes these error to happen?

FMAC: v5.10.9-2022_0321

Platform: Sigmastar

========================================================================

Loading modules backported from Linux version v5.10.9-2022_0321-0-ga0971bc0b123
Backport generated by backports.git v5.10.42-1-0-gbee5c545
cfg80211: Loading compiled-in X.509 certificates for regulatory database
platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
cfg80211: failed to load regulatory.db
brcmfmac: brcmf_fw_alloc_request: using cypress/cyfmac43455-sdio for chip BCM4345/6
usbcore: registered new interface driver brcmfmac
brcmfmac: brcmf_fw_request_firmware: no board-specific nvram available (ret=-2), device will use cypress/cyfmac43455-sdio.txt
brcmfmac: brcmf_fw_alloc_request: using cypress/cyfmac43455-sdio for chip BCM4345/6
brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Jan 17 2022 21:19:40 version 7.45.244 (408afbc CY) FWID 01-4639b629
/ # ifconfig wlan0 up
>> [sdmmc_1] Err: #Cmd_52 (0x92003E01)=>(E: 0x0008)(S: 0x00001002)__(L:1065)
/tmp # ./wpa_supplicant/wpa_passphrase Cisco07472 87654321 > ./wpa.conf
/tmp # ./wpa_supplicant/wpa_supplicant -D nl80211 -i wlan0 -c ./wpa.conf -B
Successfully initialized wpa_sup>> [sdmmc_1] Err: #Cmd_52 (0x92003E01)=>(E: 0x0008)(S: 0x00001002)__(L:1065)
plicant
nl80211: kernel reports: Registration to specific type not supported
/tmp # >> [sdmmc_1] Err: #Cmd_52 (0x92003E01)=>(E: 0x0008)(S: 0x00001002)__(L:1065)

/tmp # >> [sdmmc_1] Err: #Cmd_52 (0x92003E01)=>(E: 0x0008)(S: 0x00001002)__(L:1065)
if/tmp # ifcon/tmp # ifconfig wlan0 192.168.1.133
/tmp # rou/tmp # route add default gw 192.168.1.1 wlan0
/tmp # ping -I wlan0 192.168.1.1
PING 192.168.1.1 (192.168.1.1): 56 data bytes
64 bytes from 192.168.1.1: seq=0 ttl=64 time=36.429 ms
64 bytes from 192.168.1.1: seq=6 ttl=64 time=56.861 ms
>> [sdmmc_1] Err: #Cmd_52 (0x92003E01)=>(E: 0x0008)(S: 0x00001002)__(L:1065)
64 bytes from 192.168.1.1: seq=19 ttl=64 time=19.641 ms
>> [sdmmc_1] Err: #Cmd_52 (0x92003E01)=>(E: 0x0008)(S: 0x00001002)__(L:1065)
64 bytes from 192.168.1.1: seq=28 ttl=64 time=66.175 ms
>> [sdmmc_1] Err: #Cmd_52 (0x92003E01)=>(E: 0x0008)(S: 0x00001002)__(L:1065)
[sdmmc]---Hal_SDMMC_SendCmdAndWaitProcess--1057--MIEEvent = 1--Trig_MIE_INTR = 1--MIE_EVENT[00] = 0x 40- MIE_INT_EN[01] = 0x 1b---SD_STS[0D] = 0x 640--

Hello, 

I am looking a low cost Wifi chipset that supports 802.11 a/b/g/n standard with embedded Wifi/networking stack to offload MCU used in our application. Please suggest the best suit.

Host Interface required: SDIO or SPI

Thanks,

Deepak

Hi,

Our battery powered device hibernates most of the time, then wakes up, connects to server for a few exchanges and goes back to sleep. Currently the main issue we have is the delay between power up and connection established (and the related power consumption).

Question 1

We can see a delay of about 3sec between the call to cy_wcm_connect_ap and the start of the 4 way handshake. 

16:06:22,879: cy_wcm_connect_ap

16:06:25,725 EAPOL 113 Key (Message 1 of 4)

I suppose this comes from an active scan. 

I tried to set the band (wifi_conn_param.band = CY_WCM_WIFI_BAND_2_4GHZ) but I did not see any impact.

I tried to set the bssid (wifi_conn_param.BSSID) but it also did not have any impact.

How can we decrease the time it takes to connect to the AP? 

Can we connect directly to the previous known working BSSID without a scan?

Question 2:

With wireshark, we can see that there is about 3sec of ICMPV6 exchange before the dhcp resolution, can we avoid/deactivate this?

Infos:

cyw43907, design based on the dev kit. 

Modus toolbox latest version

Release build (debug is much slower)

We have this integrated CYW4356 in our dash cam product line and are trying to get RED certification and the lab is requesting the Declaration of Conformity for European Union’s Radio Equipment Directive. Is this module certified for RED?

Hello ,

The SD specification defines "Bus Signal Volatage Switch Sequence".

Does CYW4373 support this specification? yes or no??

If yes, please tell me the VDDIO voltage which should be supplied.

3.3V, 1.8V or dynamic change is necessary??

Thanks,