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--- SoupGate-Win32 v1.05
* Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)

On 16/09/2024 21:19, druck wrote:

On 14/09/2024 19:32, The Natural Philosopher wrote:

[   15.888471] brcmfmac: brcmf_cfg80211_set_power_mgmt: power save
enabled

You may find it is slightly more reliable with power saving disabled.

I have done this. I think it is more stable. It is more appropriate in a
server anyway

To disable temporarily use:-

sudo /sbin/iw dev wlan0 set power_save off

To make persistent create a file called /etc/udev/rules.d/71-wifi_power_save_off.rules containing the line:-

I used nmcli I think...yes. I have recorded everything I have done on
this implementation in case I have to do it again.

sudo nmcli c modify [SSID] 802-11-wireless.powersave 2

I had to do it for the other SSID as well.

I made a decision - as with systemd,- that in NetworkManager was the 'supported' way to do stuff, I might as well [learn to] use it.

I am less interested in learning the more recondite areas of the distro,
than achieving a stable platform on which to build an application.

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="brcmfmac", KERNEL=="wlan0", RUN="/sbin/iw dev wlan0 set power_save off"

---druck

I am not saying 'solved' BUT since using the bigger power supply, it
hasn't *dropped* at all, however there are still the odd reconnects that occasionally take too long...on one wifi point. Oddly I have two now configured and after retrying the first one a few times it decided to
try the one literally inches away and has been solid on that one ever
since.

And interesting discovery was that the configuration of a static address applies to one SSID only - a 'connection' in Network Manager parlance -
not to the *interface* wlan0..

Which is why I thought it had bricked when I changed wifi access points
on the fly. The next time I did that I realised it was now back on
DHCP...and was available on a different IP address...

Anyway the final conclusions seem to be :

1. The ZERO 2W is hungrier for electrons than the old ZERO W.
2. The symptoms of starvation are evident first in the WiFi hardware.
The CPU and nearly everything else is fed from 3.3V, 1.8V and 1.3V downconverted supplies. No documentation showing what voltage was used
by the WiFi chip exists that I could find.
3. On at least my model, whilst the name of the company may have
changed, the old Broadcomm wifi chip and driver is still used.
4. Apart from having to use journalctl, it is unusually not possible to
blame systemd for these issues.
5. Whilst a chinesium USB source *may* be able to deliver the quoted
current, it is not necessarily able to deliver it in a noise free or voltage-retaining fashion.

I never got round to putting a meter or a scope on the thing - it's a
bit awkward especially with a 'hat' on.

Interestingly the Pi PICO W uses a chip that works down to 3V.

Now I have achieved stability, the unit will go to a different location
to further development where it will naturally connect to the original
POS wifi point.

But I now have a microwave with a burnt out magnetron to fix...

Sigh.

--
The lifetime of any political organisation is about three years before
its been subverted by the people it tried to warn you about.

Anon.

--- SoupGate-Win32 v1.05
* Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)

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--- SoupGate-Win32 v1.05
* Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)

On 17/09/2024 21:20, druck wrote:

On 17/09/2024 10:37, The Natural Philosopher wrote:

Anyway the final conclusions seem to be :

1. The ZERO 2W is hungrier for electrons than the old ZERO W.
2. The symptoms of starvation are evident first in the WiFi hardware.

The Zero W uses the same SOC as original Pi, and I ran that happily for
years on a 0.7A first generation Samsung Galaxy phone charger. When we
got the multicore Pi 2B it really needed a proper PSU rather than a
phone charger for reliability. The Zero 2W initially used the same SOC
as the 2B, then switched to the 3B's one when that was no longer available.

In general most of my kit is now using proper rated 5V power supplies
plus any ancillary electronics needed to complete the project. China
turns round PCBS very fast and cheap so it seems a shame not to do a
'proper' job. I am not really a fan of USB PSUs at all.
In this case once I have done the board level PSU for the 4B server, the 'proper pi' PSU will become available.

5. Whilst a chinesium USB source *may* be able to deliver the quoted
current, it is not necessarily  able to deliver it in a noise free or
voltage-retaining fashion.

You can't go wrong with the official power supply, I've not had one fail
yet. I've used others when I needed a longer USB cables, and have had to replace some more than once.

Yes. I think that what works fora mobile phone is not necessarily what
works for a Pi zerro, but the Pi Picos are happy as pigs in shit with
almost anything above 3.5V

Now I have achieved stability, the unit will go to a different
location to further development where it will naturally connect to the
original POS wifi point.

You might guess I recommend not scrimping on the access point either.

Well its an old ADSL router repurposed. It's actually pretty hard to
get a simple Ethernet to wifi *bridge*.

I did find something made in Eastern Europe that has worked in another
room OK (big house, foil lined plasterboard walls - need at leats 3 points)

But I now have a microwave with a burnt out magnetron to fix...

Not related to the Z2W I hope!

It sits under the access point!

Well it did.

New magnetron now fitted, waiting for the HV fuse to arrive. It appears
the magnetron went anode/cathode short-ish , blew the fuse and that was
all that was wrong

And it only *just* blew the fuse. It switched on, HUGE humming noise
from the HV transformer for around 10 secs, then it went quiet, HV fuse
had blown...


--
"And if the blind lead the blind, both shall fall into the ditch".

Gospel of St. Mathew 15:14

--- SoupGate-Win32 v1.05
* Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)