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by scruss
Mon Aug 12, 2019 8:57 am
Forum: Troubleshooting
Topic: Funcube Dongle ++ not working on RPI 4
Replies: 15
Views: 428

Re: Funcube Dongle ++ not working on RPI 4

Maybe best to ask the developers: http://www.funcubedongle.com/ - but it seems that the last activity there was around 2016. What software are you using it with? Plug it in, and is there any useful output from dmesg ? What about from lsusb ? Looks like it needs some udev rules. Have you gone through...
by scruss
Sat Aug 10, 2019 4:22 pm
Forum: Beginners
Topic: install gawk on raspbian
Replies: 8
Views: 205

Re: install gawk on raspbian

sudo apt update sudo apt install libsigsegv2 sudo dpkg -i ./gawk_4.1.4+dfsg-1_armhf.deb should fix it unless something else is not right with your system. I went back to a very old system running Jessie, and the installation process worked. … Mawk is a cut down version of awk. Do you have scripts t...
by scruss
Fri Aug 09, 2019 7:57 pm
Forum: Other projects
Topic: How to create a "shift" button for other switches?
Replies: 10
Views: 421

Re: How to create a "shift" button for other switches?

Unless you're absolutely sold on using a Raspberry Pi Zero, this 5-button keyboard is remarkably similar to the 5-input USB switch controller my friends at AT Makers came up with. It uses a tiny Adafruit Trinket M0, which just happens to have 5 inputs and can pretend to be a USB keyboard. Best of al...
by scruss
Fri Aug 09, 2019 12:16 pm
Forum: General discussion
Topic: To the Raspberry Zero Production line...
Replies: 41
Views: 1573

Re: To the Raspberry Zero Production line...

The holder pads inside are all designed for 3mm* screws. 2,5mm is too lose. You must use them to keep the IP rating. Maybe I hung out too long with old and reprobate machinists, but 2.5 mm → 3 mm is one of the other uses for rolling papers. Tear off a thin strip, lick it, roll it round the too-smal...
by scruss
Fri Aug 09, 2019 2:27 am
Forum: General discussion
Topic: To the Raspberry Zero Production line...
Replies: 41
Views: 1573

Re: To the Raspberry Zero Production line...

Rounded to nearest even mm and they're R10
by scruss
Fri Aug 09, 2019 2:25 am
Forum: Advanced users
Topic: [Tutorial] Hardening/Securing RPi against cold boot attacks
Replies: 8
Views: 511

Re: [Tutorial] Hardening/Securing RPi against cold boot attacks

That's a very specific setup designed to preserve crash data over a reboot. I need to see an SD image that can be inserted into any running Raspberry Pi and it will recover significant parts of memory
by scruss
Fri Aug 09, 2019 2:21 am
Forum: General discussion
Topic: Finding the Starting Pos of Servo
Replies: 1
Views: 48

Re: Finding the Starting Pos of Servo

In my experience, you can't with an analogue servo. You can only set the angle. Any library that has a Servo.read() function is just returning the value last sent to the servo in this session.
by scruss
Thu Aug 08, 2019 8:55 pm
Forum: General discussion
Topic: To the Raspberry Zero Production line...
Replies: 41
Views: 1573

Re: To the Raspberry Zero Production line...

Now if people want to debate the differences between 3-48 and 2-56 (let alone 4-40)... Does the 2, 3 and 4 refer to the size of hammer you need to drive it in? :D At least you're lucky in that half of you hardware doesn't come with Robertson square-drive heads. They're a peculiarly Canadian thing, ...
by scruss
Thu Aug 08, 2019 5:07 pm
Forum: General discussion
Topic: To the Raspberry Zero Production line...
Replies: 41
Views: 1573

Re: To the Raspberry Zero Production line...

LOL that preferred numbers are completely irrelevant in the world of metric screws! Nope: ISO 261 and ISO 262 metric screw sizes are based on the R10 and R5 series. For very little cost I got a box of M2.5 black nylon machine screws, washers, nuts and headers. Non-conducting, non-marring, worth eve...
by scruss
Thu Aug 08, 2019 4:58 pm
Forum: Raspbian
Topic: Recommended Packages
Replies: 2
Views: 136

Re: Recommended Packages

which, further to B.Goode's comment, would be something like: sudo apt update sudo apt -y upgrade sudo apt install -y ant ant-contrib ant-optional apparmor:armhf bluej ca-certificates-java claws-mail:armhf claws-mail-i18n coinor-libcbc3:armhf coinor-libcgl1:armhf coinor-libclp1:armhf coinor-libcoinm...
by scruss
Thu Aug 08, 2019 12:44 pm
Forum: General discussion
Topic: To the Raspberry Zero Production line...
Replies: 41
Views: 1573

Re: To the Raspberry Zero Production line...

In metric countries 2.5 is far less used than M2 or M3. Fact. I'd disagree strongly. M2.5 is one of the R5 preferred sizes : 2.5, 4, 6, 10, etc. M2 is flimsy. M3 is a bit on the large side. Perhaps the choice towards UNC 3 was constrained but it is not to the advantage of end users in general and i...
by scruss
Thu Aug 08, 2019 12:18 pm
Forum: Java
Topic: I2C communication from Arduino to Processing 3 in RPI
Replies: 3
Views: 623

Re: I2C communication from Arduino to Processing 3 in RPI

Your processing code never checks for 'done' (does it even open the serial device to do it?) and the Arduino code has the 'done' printing bit commented out.
by scruss
Wed Aug 07, 2019 11:57 pm
Forum: Advanced users
Topic: [Tutorial] Hardening/Securing RPi against cold boot attacks
Replies: 8
Views: 511

Re: [Tutorial] Hardening/Securing RPi against cold boot attacks

Did I miss the bit where RDPUser provided a working demo of pulling the µSD card from a running Raspberry Pi, replacing it with one that would dump RAM, and successfully reading memory from before the physical attack?
by scruss
Tue Aug 06, 2019 12:51 pm
Forum: Troubleshooting
Topic: Can boot Raspian but not other OS's
Replies: 4
Views: 128

Re: Can boot Raspian but not other OS's

There is Puppy Linux for arm - https://distro.ibiblio.org/puppylinux/arm/ - but it's not one I'd recommend.
by scruss
Tue Aug 06, 2019 12:47 pm
Forum: Raspbian
Topic: Unlock LUKS with key material on USB
Replies: 6
Views: 180

Re: Unlock LUKS with key material on USB

Given the millions of Raspberry Pi users and yet no public answer to your problem, you may be the first to attempt this. Personally, I'd avoid all the faffing about with LUKS and use ssh keys generated to reach your server hashed wireless passwords using wpa_passphrase No passwords in plain on your ...
by scruss
Mon Aug 05, 2019 2:26 pm
Forum: General discussion
Topic: Wrong date every booting
Replies: 10
Views: 584

Re: Wrong date every booting

hwclock: Cannot access the Hardware Clock via any known method.
though that's not an ideal message to see. Sounds like your I²C might not be set up correctly.
by scruss
Mon Aug 05, 2019 2:20 pm
Forum: General discussion
Topic: Request for a new folder: Low Power & Solar
Replies: 35
Views: 1063

Re: Request for a new folder: Low Power & Solar

The difficulty with all off-grid power is that it's inherently local. Sure, solar has come down a lot in price since I started working with it in the early 1990s and has displaced a whole lot of other technologies, but it's not perfect everywhere. You're not going to do small hydro in the Mojave Des...
by scruss
Sun Aug 04, 2019 3:04 pm
Forum: General discussion
Topic: 4gb - 4B Demand must be high.
Replies: 134
Views: 6067

Re: 4gb - 4B Demand must be high.

I managed to score a 4GB in person at Micro Center in Mayfield Heights, OH yesterday. Sure, it was the kit (board, case, psu, cables, card, keyboard and mouse - US$120). They had two left. They had quite a number of 2GB and 1GB ones. The Raspberry Pi 4 isn't on display, you have to ask for it. They ...
by scruss
Sat Aug 03, 2019 11:26 am
Forum: Other programming languages
Topic: Introduction to BBC BASIC
Replies: 544
Views: 24069

Re: Introduction to BBC BASIC

thank you so much, Richard! It was extremely helpful.
by scruss
Sat Aug 03, 2019 1:19 am
Forum: Other programming languages
Topic: Introduction to BBC BASIC
Replies: 544
Views: 24069

Re: Introduction to BBC BASIC

…When Acorn developed BBC BASIC in 1981 they didn't want the complication of supporting OPTION BASE, but they (and the BBC) wanted to maximise compatibility with other BASICs. So they came up with a scheme which I consider to be a stroke of genius in its simplicity and effectiveness: DIM a(4) : REM...
by scruss
Fri Aug 02, 2019 8:28 pm
Forum: Troubleshooting
Topic: USB stick mounting issue
Replies: 3
Views: 117

Re: USB stick mounting issue

What's the USB stick's volume name? Does it have anything other that a-zA-Z0-9 in the name?
How is it formatted?
by scruss
Fri Aug 02, 2019 2:16 pm
Forum: General discussion
Topic: 4gb - 4B Demand must be high.
Replies: 134
Views: 6067

Re: 4gb - 4B Demand must be high.

At great expense. I am certain that the cost of the research would outweigh any benefit, … Market research also requires experience from other companies. Since the Raspberry Pi Foundation/Raspberry Pi Trading Ltd are the market makers¹, any consultants would be asking you what you already know. ---...
by scruss
Thu Aug 01, 2019 11:56 am
Forum: General programming discussion
Topic: Liberation through Computer Literacy
Replies: 1078
Views: 40363

Re: Project Digital Apocalypse Not Now

jalih wrote:
Thu Aug 01, 2019 4:31 am

Code: Select all

 /^[a-z]{2,}$/
You're not matching the full input set, though. Sure, I know that single letters aren't going to be anagrams of one another, but that regex is fractionally slower to match than the one I used in Perl.
by scruss
Wed Jul 31, 2019 11:53 pm
Forum: Other programming languages
Topic: Introduction to BBC BASIC
Replies: 544
Views: 24069

Re: Introduction to BBC BASIC

Neat! But I was a bit surprised that DIM a(4) a() = 1, 2, 3, 4 PRINT a(1) prints '2'. The equivalent code in ANSI Basic DIM a(4) MAT READ a PRINT a(1) END DATA 1,2,3,4 prints '1'. It's extra nice that you can use calculated values: a() = 1, SIN(RAD(30)), 3, 4 does exactly what you'd expect. Can you ...
by scruss
Wed Jul 31, 2019 11:20 pm
Forum: General discussion
Topic: 4gb - 4B Demand must be high.
Replies: 134
Views: 6067

Re: 4gb - 4B Demand must be high.

W. H. Heydt wrote:
Wed Jul 31, 2019 10:59 pm
… The big problem for the US, as it has been explained, is that they can't be shipped into the US until the FCC paperwork is posted.
That, and this issue identified by a US-based official reseller: https://www.youtube.com/watch?v=7SxroOvDK8A

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