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by dickon
Wed Sep 18, 2019 5:54 pm
Forum: General discussion
Topic: Power over Ethernet and Fan
Replies: 9
Views: 184

Re: Power over Ethernet headed

I was thinking about a fan solution that would not block the GPIO pins and only pull power from the POE header. Could a 12V fan be directly connected? Would I need a 24V fan? Or does it require additional circuitry? Use a stacking header. https://thepihut.com/products/stacking-header-for-raspberry-...
by dickon
Mon Sep 16, 2019 1:41 pm
Forum: General discussion
Topic: Raspberry Pi4 bootloader update package
Replies: 54
Views: 3240

Re: Raspberry Pi4 bootloader update package

You probably need to learn to follow links when they are provided. You might discover that your specific needs are all addressed there... more helpful than anything I would have written. Then please, instead of just saying that, tell me where it is that you are referring to that i need to go to hav...
by dickon
Mon Sep 16, 2019 11:47 am
Forum: General discussion
Topic: Ras Pi and Kodi
Replies: 3
Views: 97

Re: Ras Pi and Kodi

Probably best off just using the official Pi builds of LibreELEC. There is an annoying problem on the Pi 4 ATM with 10b output being rendered incorrectly in 8b, but this is allegedly being worked on (although I can't imagine it's a terribly high priority ATM, what with more pressing bugs and feature...
by dickon
Fri Sep 13, 2019 11:15 am
Forum: General discussion
Topic: 12v battery + 25 watt Solar = always powered 4B?
Replies: 17
Views: 527

Re: 12v battery + 25 watt Solar = always powered 4B?

92m for wifi outside. I have an AP within ~15m of the greenhouse, albeit inside a set of bifolds.

As for BLE, that same AP can read a Ruuvitag BLE beacon in more or less the same spot quite happily.
by dickon
Thu Sep 12, 2019 9:44 pm
Forum: General discussion
Topic: 12v battery + 25 watt Solar = always powered 4B?
Replies: 17
Views: 527

Re: 12v battery + 25 watt Solar = always powered 4B?

I'd probably use an ESP32 these days, rather than a Pi1. With the deep sleep mode on that, I suspect a 120Ah battery is very much overkill for a system to monitor a couple of temperature probes, report them back to base (BLE or wifi; I'm not fussed), and later to water the plants for me.
by dickon
Wed Sep 11, 2019 10:13 pm
Forum: General discussion
Topic: 12v battery + 25 watt Solar = always powered 4B?
Replies: 17
Views: 527

Re: 12v battery + 25 watt Solar = always powered 4B?

FWIW, I have a 120Ah 12V deep-cycle leisure battery and a 80W panel in southern England, oriented south, with a solar charge controller and a cheapish <24V->5V converter, and I get almost a full year on a Pi 1B. It fails for about a month of nights, and misty days, in the middle of winter. It would ...
by dickon
Wed Sep 11, 2019 12:15 pm
Forum: General discussion
Topic: Raspberry Pi4 bootloader update package
Replies: 54
Views: 3240

Re: Raspberry Pi4 bootloader update package

Well, that was easy. Thanks.
by dickon
Wed Sep 11, 2019 10:32 am
Forum: General discussion
Topic: Raspberry Pi4 bootloader update package
Replies: 54
Views: 3240

Re: Raspberry Pi4 bootloader update package

Will 'critical release' cover ethernet booting? ie, if I just cron this, will I eventually get a message telling me an update is required and, upon installing it, magically gain proper netbooting?
by dickon
Sun Sep 08, 2019 7:40 pm
Forum: General discussion
Topic: Tonido not accessible
Replies: 8
Views: 282

Re: Tonido not accessible

Have you considered installing libjpeg?
by dickon
Fri Sep 06, 2019 10:37 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 303
Views: 50740

Re: Raspberry Pi 4 usb boot?

TBH, the question was asked, answered ('yeah, soon'), and we've had a further 11.5 pages of rubbish since. If the mods haven't locked it by now -- and they haven't, yet -- well, personally, I consider it fair game. It hasn't been entirely fruitless. And for the record, I consider what I suggested ab...
by dickon
Fri Sep 06, 2019 9:33 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 303
Views: 50740

Re: Raspberry Pi 4 usb boot?

Doesn't really matter, TBH. The way these things tend to run, the likes of Google's Project Zero *will* find a way to exploit what you think is unexploitable. A first-stage bootloader has the ability to alter *everything* that comes after it. It's a deeply powerful position to be in.
by dickon
Fri Sep 06, 2019 8:18 pm
Forum: General discussion
Topic: Raspberry Pi 4 Dual Monitor in Console
Replies: 2
Views: 129

Re: Raspberry Pi 4 Dual Monitor in Console

Nouveau on x86 (the free nVidia driver) does the same thing: mirrored output on console, whatever you like in X via xrandr. If you find out how to do this, let me know...
by dickon
Fri Sep 06, 2019 8:14 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 303
Views: 50740

Re: Raspberry Pi 4 usb boot?

'only a bootloader'! -- you get to load the kernel, any initrd, dtb, and commandline into RAM, edit them as you see fit (the dtb in particular is actually required to be altered by the bootloader, and that has the addresses of all sorts of entertaining devices embedded within it), and, if you're fee...
by dickon
Wed Sep 04, 2019 6:00 pm
Forum: General discussion
Topic: DNS issues
Replies: 10
Views: 333

Re: DNS issues

Hmm. If that's the case, then removing the request types from /etc/dhcp/dhclient.conf and / or /etc/dhcpcd.conf might help you. I didn't think it failed when it couldn't write to that file -- fairly sure I usually chattr +i it to stop it being clobbered -- but I might be wrong.
by dickon
Wed Sep 04, 2019 3:43 pm
Forum: General discussion
Topic: DNS issues
Replies: 10
Views: 333

Re: DNS issues

If I had to guess, there's a race condition between the network being configured via dhcp, and those two services starting up. I'd bung those lines in /etc/rc.local and be done with it, TBH. If you're not going to upgrade the thing, it's probably your best bet to do that and forget about it. There a...
by dickon
Wed Sep 04, 2019 3:11 pm
Forum: General discussion
Topic: DNS issues
Replies: 10
Views: 333

Re: DNS issues

.bashrc is definitely the wrong place for that sort of thing, as it'll be run every time you login to the machine or spawn a shell. I'd stick it at the end of /etc/rc.local if I were you; an @reboot stanza in a crontab would also do it. (Edit to add: /etc/rc.local is considered a bit old-fashioned t...
by dickon
Wed Sep 04, 2019 9:01 am
Forum: OpenMAX
Topic: Openmax il freeze on pi4 after running some time
Replies: 7
Views: 285

Re: Openmax il freeze on pi4 after running some time

Yes, I am re-opening the file, and since I am re-opening, therefore it is not reading nothing. it reads from the start again. The video is about 15 seconds, it looped for 10-15 minutes ,it varies and the same code does not freeze on pi3 The first buffer you feed to the OpenMAX stack is empty, becau...
by dickon
Tue Sep 03, 2019 10:10 pm
Forum: General discussion
Topic: How to INSTALL Linux onto a Raspberry 4?
Replies: 20
Views: 905

Re: How to INSTALL Linux onto a Raspberry 4?

I was wondering about this earlier, purely as an intellectual exercise. If they present as USB mass-storage, surely you could just drop a traditional partition table on the front, a FAT32 filesystem for /boot (with a suitable kernel and installation initrd), and be done with it? Utterly nonstandard ...
by dickon
Tue Sep 03, 2019 1:39 pm
Forum: OpenMAX
Topic: Openmax il freeze on pi4 after running some time
Replies: 7
Views: 285

Re: Openmax il freeze on pi4 after running some time

Your looping is badly flawed, too. You're simply reopening the file, feeding an empty packet to the stack -- because you're not reading anything -- and then dropping back into the main loop. I'd expect to see the clocks reset, and a OMX_BUFFERFLAG_STARTTIME set on the first actual packet of the reop...
by dickon
Thu Aug 29, 2019 8:28 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 303
Views: 50740

Re: Raspberry Pi 4 usb boot?

I'm not entirely sure what they're on about there, TBH. I handle that with symlinks in /tftpboot: lrwxrwxrwx 1 root root 9 Jul 19 2018 ec098a3c -> pi-debian lrwxrwxrwx 1 root root 34 May 11 2018 pi-debian -> /var/local/nfsroot/pi-debian/boot/ which works nicely. Not that I use dnsmasq.
by dickon
Thu Aug 29, 2019 7:10 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 303
Views: 50740

Re: Raspberry Pi 4 usb boot?

I am filled with unimaginable levels of joy at this news.
by dickon
Thu Aug 29, 2019 2:20 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 303
Views: 50740

Re: Raspberry Pi 4 usb boot?

Yeah, pretty much. Nothing other than x86 actually PXEs -- as nothing other than x86 has anything as stunningly braindead as a BIOS and x86 architecture -- but the term caught on to mean 'DHCP and TFTP a kernel and boot it' more generically. These days, of course, the kernel is often a bootloader --...
by dickon
Thu Aug 29, 2019 1:39 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 303
Views: 50740

Re: Raspberry Pi 4 usb boot?

The Pre-eXecution Environment is a rather grandiosly-named standard developed by Intel back in the early '90s for booting DOS on x86 PCs. It uses BOOTP / DHCP and TFTP to load a kernel over the network (which is the bit you see), but its actually mostly about presenting a standardised BIOS extension...
by dickon
Thu Aug 29, 2019 11:30 am
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 303
Views: 50740

Re: Raspberry Pi 4 usb boot?

andrum99 wrote:
Thu Aug 29, 2019 11:14 am
Raspberry Pi's don't do PXE boot: it's Ethernet boot, but not PXE boot.
At last! Someone else who understands the difference...
by dickon
Wed Aug 28, 2019 11:28 pm
Forum: General discussion
Topic: Raspberry Pi3 SDCard upgraded to Buster put into RPi4 won't boot
Replies: 6
Views: 379

Re: Raspberry Pi3 SDCard upgraded to Buster put into RPi4 won't boot

A fresh install is the only thing supported. As an upgrade, I recomend the usual dpkg --get-selections / --set-selections / dselect-upgrade dance to get all the packages installed, then copy over the appropriate bits of /etc to configure each important package. This does work, but it involves some f...

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