On 21/01/2021 03:45 pm, The Natural Philosopher wrote:
> On 21/01/2021 15:39, Chris Elvidge wrote:
>> On 21/01/2021 03:24 pm, The Natural Philosopher wrote:
>>> For reasons not pertinent to PIs, I started researching wifi
>>> performance, and would like the assembled multitudes to comment on
>>> the correctness, or otherwise of what I have found.
>>>
>>> - All Pis with built-in Wifi use the Broadcomm chip
>>> - This chip is not capable of 5Ghz connectivity
>>> - Nor is it capable of 40Mhz dual channel operation
>>> - ergo it *cannot* connect at *more* than 72Mbps
>>>
>>> And its often _way_ worse than that.
>>>
>>>
>>
>> Both my Pi3B+ connect to my 5Ghz wifi.
>>
> +++!
>
> can you show what chipsets/drivers and what protocols they are using?
>
> It would be nice to tabulate the results
>
>

lshw shows:
*-network
 description: Wireless interface
 physical id: 2
 logical name: wlan0
 serial: b8:27:eb:fb:cc:a1
 capabilities: ethernet physical wireless
 configuration: broadcast=yes driver=brcmfmac driverversion=7.45.206
firmware=01-88ee44ea ip=192.168.23.152  multicast=yes wireless=IEEE 802.11

iwconfig:
wlan0     IEEE 802.11  ESSID:"CHRISPLACE-A"
           Mode:Managed  Frequency:5.3 GHz  Access Point: 80:3F:5D:FA:4D:FA
           Bit Rate=78 Mb/s   Tx-Power=31 dBm
           Retry short limit:7   RTS thr:off   Fragment thr:off
           Encryption key:off
           Power Management:on
           Link Quality=70/70  Signal level=-31 dBm
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:0  Invalid misc:0   Missed beacon:0

# cat /sys/class/net/wlan0/device/vendor
0x02d0
# cat /sys/class/net/wlan0/device/device
0xa9a6

02d0 is Broadcom



--
Chris Elvidge
England

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