Other Parts Discussed in Thread: WL1831MOD, WL1831, WL1801
We use WL1801MOD/WL1831MOD in different products in combination
with different SoC's (for different customers)
In some setups we get very poor to non network performance.
(constant 30-80% packet loss) In worst-cases communication does
not work at all. The problem is persistent and reproducible in these setups.
Common to all setups is the
use channel 11 and other networks on channel 11 nearby.
The problem does not seem to be affected by signal/link quality
nor regulatory settings (wireless regdb).
When the setup is changed to a different channel (1,6) the problem
disappears. A more detailed on the setups description can be found
below.
Currenty two products (different customers, different hardware,
different soc) are affected. One product is already in production,
the other one is in finalization (field test) -- Therefore we are pressed
for time here and need to solve this as quick as possible.
---- Details
Software:
We use mainline based OSS software: linux-4.14. (setup 1) and
linux-5.4. (setup 2) and wpa_supplicant 2.9
Firmware is 8.9.0.0.81
WPA Config structure is very basic / mostly default
{{{
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
ap_scan=1
network={
ssid="..."
scan_ssid=1
key_mgmt=WPA-PSK
psk=****PSK****
}
}}}
Current setups:
For both setups we captured traces using gLogger, which we can provide on
request.
Setup 1 (Hardware platform NXP i.MX6 + WL1831)
* Network A: Access-point D-Link DIR‑815 on Channel 11 (WPA-PSK2)
* Device with WL1831 connected to Network A -> Communication normal
* Other Devices (non WL18xx) connected to A -> Communication normal
* Activating Network B on Channel 11 (different SSID; Windows 10 Access-point)
* Device with WL1831 connected to Network A -> Communication normal
* Other Devices (non WL18xx) connected to A -> Communication normal
* Connect Smartphone with Network B
* Device with WL1831 connected to Network A -> *Bad/No Communication*
* Other Devices (non WL18xx) connected to A -> Communication normal
* Smartphone connected to Network B -> Communication normal
* Disconnect Smartphone from Network B
* Device with WL1831 connected to Network A -> Communication normal
* Other Devices (non WL18xx) connected to A -> Communication normal
When repeating the same experiment using channel 1 or channel 6 communication
of device with WL1831 stays normal. The problem does not seem to be affected
by signal/link quality nor regulatory settings (wireless regdb).
Similar problems were also detected with different setups (e.g. AP HP MSM460 on Channel 11)
Setup 2 (Hardware platform NXP i.MX6UL + WL1801):
* Two different commercial environments with multiple WIFI Networks on Channel 11 on different locations
* One or more WL1801 connected to a network on channel 11 -> all WL1801 devices have 30-80% Packet Loss (local ping)
* Other devices in the same network (even in same Spot) behave normally
* The problem is persistent (since weeks/start of test)
Like in setup 1: The problem does not seem to be affected
by signal/link quality.
We can provide even more information on the software, setups, configuration, ... if helpful.
Furthermore we can test suggested changes in both setups.
----
We hope for a quick solution
Thanks in advance
