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by pidd
Sat Aug 08, 2020 4:22 pm
Forum: Troubleshooting
Topic: eth0 Doesn't Start if Power Goes Out [3B+]
Replies: 4
Views: 124

Re: eth0 Doesn't Start if Power Goes Out [3B+]

In buster it is best to use this to restart your network...

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sudo systemctl restart dhcpcd

You might want to do the following to make the network comes up automatically at boot

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sudo systemctl enable dhcpcd
by pidd
Sat Aug 08, 2020 4:05 pm
Forum: Beginners
Topic: TRIM question
Replies: 9
Views: 363

Re: TRIM question

Generally as long as you are NOT using fstrim's "-A" argument, it will kick an error if trim isn't supported. So I'd say its more than likely it is working ok. But who knows? The degree of autonomy in these drives makes it difficult to tell what is going on. One thing I do to check if it works is lo...
by pidd
Sat Aug 08, 2020 3:18 pm
Forum: Beginners
Topic: TRIM question
Replies: 9
Views: 363

Re: TRIM question

Trim doesn't happen immediately, the drive decides in its own time when it will do a garbage collection, in the bid to make the drives last longer it could be held off for a long time and depends on the algorithm the manufacturer has used. If there is plenty of unused or deleted space on the drive, ...
by pidd
Sat Aug 08, 2020 11:42 am
Forum: Off topic discussion
Topic: Three Mobile UK 4G blocking this forum
Replies: 14
Views: 699

Re: Three Mobile UK 4G blocking this forum

As far as I can tell the issue is bad actors on on the internet. With all their SPAMMING, DDOSing, botnets and the like. Which results in service providers playing whack-a-mole trying to keep them at bay. Which, from time to time has collateral damage, and honest users lost in friendly fire. The UK...
by pidd
Sat Aug 08, 2020 10:59 am
Forum: General discussion
Topic: Use raspberry pi 3 with network switch?
Replies: 6
Views: 595

Re: Use raspberry pi 3 with network switch?

dickon wrote:
Sat Aug 08, 2020 10:09 am
One potential thing to worry about is the addressing. You can't bridge the ethernet and wifi interfaces on the Pi in managed mode, so you'll need to setup a dhcpd and NAT rules on the Pi.
[/quot]

dnsmasq and ufw? Or is there a tidier way?
by pidd
Sat Aug 08, 2020 10:50 am
Forum: Android
Topic: RPi LineageOS Tablet
Replies: 27
Views: 644

Re: RPi LineageOS Tablet

Wow, I wasn't going to bother looking at it thinking it is yet another Pi-in-a-box but I'm glad I did watch the video, he's done loads of work and thought things through - he will go far in life!
by pidd
Sat Aug 08, 2020 10:31 am
Forum: General discussion
Topic: How to drive Brushless DC motor with built in driver and no documentation?
Replies: 20
Views: 843

Re: How to drive Brushless DC motor with built in driver and no documentation?

But before buying extra components, why not just stick a highish frequency PWM on the input and see if it works with no extra circuitry? Depending what's inside the controller (ie it may already have a low pass filter), extra gubbins outside the motor possibly achieves nothing. Since the manufactur...
by pidd
Sat Aug 08, 2020 10:23 am
Forum: Troubleshooting
Topic: headless connection to wifi with raspberry pi zero doesn't work
Replies: 12
Views: 316

Re: headless connection to wifi with raspberry pi zero doesn't work

Are you using Raspberry Pi Imager on a PC to write the SD card? Are you ejecting the card before removing it?
by pidd
Sat Aug 08, 2020 12:37 am
Forum: Ubuntu
Topic: Chnage initial user before first boot
Replies: 6
Views: 220

Re: Chnage initial user before first boot

You probably could edit the configuration with a linux computer but I really wouldn't recommend it. Get the Pi up and running before you start going off the beaten track. Its easy to make other users once you have the system up and running.
by pidd
Sat Aug 08, 2020 12:34 am
Forum: Ubuntu
Topic: I need a usb wifi dongle for the pi4 8Gb
Replies: 4
Views: 189

Re: I need a usb wifi dongle for the pi4 8Gb

I have one of these on my desk for testing things. Uses a RT2780 chip which the Pi supports.

https://www.ebay.co.uk/itm/Edimax-EW-77 ... 2134843203
by pidd
Sat Aug 08, 2020 12:15 am
Forum: General discussion
Topic: How to drive Brushless DC motor with built in driver and no documentation?
Replies: 20
Views: 843

Re: How to drive Brushless DC motor with built in driver and no documentation?

Not a good idea putting a capacitor straight on the output pins, it can cause high peak currents.

However with a resistor and a capacitor you can make an rc low pass filter which will convert PWM into a relatively steady DC voltage.
by pidd
Sat Aug 08, 2020 12:01 am
Forum: Troubleshooting
Topic: headless connection to wifi with raspberry pi zero doesn't work
Replies: 12
Views: 316

Re: headless connection to wifi with raspberry pi zero doesn't work

filifunk wrote:
Fri Aug 07, 2020 11:49 pm
I get what you're saying about wpa_supplicant.conf...but not sure what you mean on ssh...am I saving it there as

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ssh.txt
, or

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ssh
?
Either, its up to you, system checks for either of them.
by pidd
Fri Aug 07, 2020 12:44 pm
Forum: Troubleshooting
Topic: PI Zero W dead?
Replies: 3
Views: 112

Re: PI Zero W dead?

I doubt it is dead you may have corrupted the SD card.
by pidd
Thu Aug 06, 2020 10:54 pm
Forum: Troubleshooting
Topic: unable to disable password based authentication for ssh
Replies: 3
Views: 179

Re: unable to disable password based authentication for ssh

Did you restart the ssh daemon?
by pidd
Thu Aug 06, 2020 10:45 pm
Forum: Advanced users
Topic: external boot trigger
Replies: 3
Views: 130

Re: external boot trigger

I hope you are not putting 5V on the run pin?

I think you need to momentarily ground the run pin to boot the zero, it is pulled up to 3.3V via a resistor.
by pidd
Thu Aug 06, 2020 10:13 pm
Forum: General discussion
Topic: Linux WIFI Not Supported by Spectrum/Charter?
Replies: 42
Views: 1347

Re: Linux WIFI Not Supported by Spectrum/Charter?

Pretty much like the three I depend on daily and have little chance of replacing any time soon. WPA maybe not as secure as WPA2 but compared to WEP or 'open' ???? There's probably fixes for XP but it's been ok for 10yrs or so so far and will have to do for now. Sorry, senior moment, I was probably ...
by pidd
Thu Aug 06, 2020 10:07 pm
Forum: General discussion
Topic: HugePages on Rp4
Replies: 4
Views: 207

Re: HugePages on Rp4

Depends what you mean by any distro, if its anything other than RpiOS it would be down to that OS whether it can be configured for huge-mem.

If it is RpiOS, why wouldn't you run the latest version?
by pidd
Thu Aug 06, 2020 9:53 pm
Forum: General discussion
Topic: HugePages on Rp4
Replies: 4
Views: 207

Re: HugePages on Rp4

Can be done if you are prepared to build the kernel https://www.raspberrypi.org/documentati ... uilding.md

EDIT:Also see viewtopic.php?t=264361
by pidd
Thu Aug 06, 2020 9:39 pm
Forum: General discussion
Topic: Is it compatible? SSD T5 with a Raspberry Pi
Replies: 4
Views: 202

Re: Is it compatible? SSD T5 with a Raspberry Pi

Certified as using 0.8A maximum @ 5V, unfortunately I can't find a typical power rating but I'd suspect it is substantially less than 0.8A. This should be ok on any Pi3 provided there isn't another high-ish current device connected, plenty of reserve for keyboard/mouse etc provided an adequate power...
by pidd
Thu Aug 06, 2020 9:32 pm
Forum: Troubleshooting
Topic: can I find the timestamp of the last vsync? pursuing NTSC 59.94Hz bug.
Replies: 21
Views: 555

Re: can I find the timestamp of the last vsync? pursuing NTSC 59.94Hz bug.

Its good you have resolution, the sad part is that it is the end of a really interesting thread, I admire your ingenuity and persistence. Well done!
by pidd
Thu Aug 06, 2020 9:24 pm
Forum: General discussion
Topic: Raspberry Pi z w remote control without internet usage
Replies: 3
Views: 154

Re: Raspberry Pi z w remote control without internet usage

If necessary you could have a series of Rpi0W repeaters of some sort or another.

I do a lot of work underground and have been thinking about an alarm system, recently we have tried radios with varying results and I'd like something more robust.
by pidd
Thu Aug 06, 2020 9:05 pm
Forum: General discussion
Topic: Linux WIFI Not Supported by Spectrum/Charter?
Replies: 42
Views: 1347

Re: Linux WIFI Not Supported by Spectrum/Charter?

3. Default router WPA2 need change to WPA Why not WPA2? its secure which WPA isn't. WPA was crack-able in less than 20 minutes about 8 years ago, its probably crack-able in less than a minute with a smartphone these days. iirc I have one device that can't do wpa2 and its so deeply buried in a box t...
by pidd
Thu Aug 06, 2020 8:20 pm
Forum: Python
Topic: Help with led.
Replies: 32
Views: 820

Re: Help with led.

by pidd
Thu Aug 06, 2020 7:49 pm
Forum: Android
Topic: Can i still overclock with Android OS? im a n00b
Replies: 8
Views: 226

Re: Can i still overclock with Android OS? im a n00b

Has anybody got Android going on the Pi or are they half-crippled emulators in all but name?
by pidd
Thu Aug 06, 2020 7:45 pm
Forum: Troubleshooting
Topic: Can I configure a new image without HDMI?
Replies: 7
Views: 223

Re: Can I configure a new image without HDMI?

Note that for the hdmi to be activated, you have to plug it in to the pi and have it fully switched on before you boot the Pi ..... just checking in case you haven't broken the hdmi connector.

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