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by Milliways
Fri Jun 18, 2021 12:17 am
Forum: Beginners
Topic: Raspberry Pi 3B Under Voltage Warning
Replies: 25
Views: 805

Re: Raspberry Pi 3B Under Voltage Warning

drgeoff wrote:
Thu Jun 17, 2021 8:27 am
JacobChristApium wrote:
Thu Jun 17, 2021 5:25 am
Is the low voltage detection for the Pi 3B done by the PMIC
Yes.
The Pi3 has 2 regulators (not PMIC - although this is semantics) neither of which is responsible for low voltage detection, which is done by a separate chip, all of which is clearly shown on the schematics.
by Milliways
Thu Jun 17, 2021 7:12 am
Forum: Advanced users
Topic: Bullseye python3 version
Replies: 3
Views: 358

Bullseye python3 version

I changed the repository on one of my Pi to Bullseye for testing. I was surprised to see Python 3.8.5. Python 3.9.0b5 is in the repository (although this lags the Debian default Python 3.9.2-3) but installing this did not update the default. What is the recommended method of updating this. It is sim...
by Milliways
Thu Jun 17, 2021 6:30 am
Forum: Beginners
Topic: Raspberry Pi 3B Under Voltage Warning
Replies: 25
Views: 805

Re: Raspberry Pi 3B Under Voltage Warning

I don't know what the authors of the documentation have been reading. The APX803 data sheet says 4.56 4.63 4.70 MxL7704 Data Sheet (used in Pi3B+ and later) says Voltage rising 4.59 4.63 4.7 Voltage falling 4.52 4.57 4.65 and Input voltage range: 4.0V to 5.5V Testing I have conducted confirms these ...
by Milliways
Thu Jun 17, 2021 1:27 am
Forum: Python
Topic: Initializing pins with gpiozero
Replies: 1
Views: 176

Re: Initializing pins with gpiozero

You should be able to set state with gpiozero.Pin. See https://gpiozero.readthedocs.io/en/stab ... se-classes.

NOTE gpiozero (by default) uses RPi.GPIO and importing it is unnecessary (and undesirable).

You can set the default pin factory
by Milliways
Tue Jun 15, 2021 6:12 am
Forum: Automation, sensing and robotics
Topic: how to strip REALLY thin wires?
Replies: 12
Views: 555

Re: how to strip REALLY thin wires?

Years ago I used to wire-wrap my prototypes. This uses 30AWG (0.01") with a tough teflon coating. I had a dedicated stripper, but often used a cheap tool (which was basically crossed blades with a V notch and an adjustable depth stop) because it was faster. Like these ? https://www.screwfix.co...
by Milliways
Tue Jun 15, 2021 1:39 am
Forum: Automation, sensing and robotics
Topic: how to strip REALLY thin wires?
Replies: 12
Views: 555

Re: how to strip REALLY thin wires?

Years ago I used to wire-wrap my prototypes.

This uses 30AWG (0.01") with a tough teflon coating.

I had a dedicated stripper, but often used a cheap tool (which was basically crossed blades with a V notch and an adjustable depth stop) because it was faster.
by Milliways
Fri Jun 11, 2021 6:36 am
Forum: Raspberry Pi OS
Topic: agnostics - confusing output
Replies: 3
Views: 476

Re: agnostics - confusing output

Strangely, when I run the test on Bullseye it works (although it is slow and obviously doesn't like my old SD Card). The image was a copy of Buster, with sources updated to Bullseye. Raspberry Pi Diagnostics - version 0.9 Fri Jun 11 16:29:06 2021 Test : SD Card Speed Test Run 1 prepare-file;0;0;3247...
by Milliways
Sun Jun 06, 2021 6:53 am
Forum: General discussion
Topic: Corporate identity Raspberry pi
Replies: 42
Views: 1574

Re: Corporate identity Raspberry pi

The OP's post reminds me of the conversation Arthur Dent had with the fire makers committee in the The Hitchhiker's Guide to the Galaxy

If this was an official project I am sure it would have been mentioned on the Foundation site.

Maybe the OP should get a Pi (or better several).
by Milliways
Wed May 26, 2021 12:41 pm
Forum: Raspberry Pi OS
Topic: agnostics - confusing output
Replies: 3
Views: 476

agnostics - confusing output

Running agnostics reports "Pass" but the log gives strange outputs which don't inspire confidence and provide little information. Raspberry Pi Diagnostics - version 0.9 Sun Jun 6 11:16:51 2021 Test : SD Card Speed Test Run 1 fio: symbol lookup error: /usr/lib/arm-linux-gnueabihf/librados.s...
by Milliways
Tue May 25, 2021 11:35 am
Forum: General discussion
Topic: Right way to determine if Pi device has onboard WiFi?
Replies: 21
Views: 685

Re: Right way to determine if Pi device has onboard WiFi?

It is simple to determine what network devices are available even if they are not activated;

Code: Select all

ls /sys/class/net/
by Milliways
Sun May 16, 2021 1:38 am
Forum: General discussion
Topic: make pi4 leds all off on full power down
Replies: 14
Views: 695

Re: make pi4 leds all off on full power down

While some of this thread may be interesting, there is a lot of misinformation. The red LED on the Pi4 is under software control, so can be turned off; this is achieved by shorting the LED with a MOSFET - absolutely NOTHING to do with power consumption. The LED in some earlier models was controllabl...
by Milliways
Tue May 11, 2021 7:55 am
Forum: Raspberry Pi OS
Topic: ping suid permission
Replies: 6
Views: 230

SOLVED: ping suid permission

I "fixed" the problem (which was in both my Raspberry Pi OS & Lite installations) with

Code: Select all

apt reinstall inetutils-ping
The cause remains unclear.
by Milliways
Tue May 11, 2021 12:00 am
Forum: Raspberry Pi OS
Topic: ping suid permission
Replies: 6
Views: 230

ping suid permission

I was working on some scripts and ping was failing with error:- ping: socket: Operation not permitted I checked the permissions and found -rwxr-xr-x 1 root root 55720 2020-01-14 10:29 /bin/ping* I am sure it used to work and I can't recall changing anything. On older OS ping had suid permissions - h...
by Milliways
Sun May 09, 2021 12:35 am
Forum: General discussion
Topic: Will the newest version of Raspbian run on Raspberry Pi 1 Model B Rev 1.2?
Replies: 10
Views: 647

Re: Will the newest version of Raspbian run on Raspberry Pi 1 Model B Rev 1.2?

It is no different to the Pi Zero which millions use, which has the same SOC & memory (as did all models prior to Pi2). Mine has only 256MB of memory - half that of a Pi Zero. pi@pione:~ $ free -h total used free shared buff/cache available Mem: 224Mi 25Mi 142Mi 1.0Mi 55Mi 148Mi Swap: 1.7Gi 0B ...
by Milliways
Sat May 08, 2021 11:54 am
Forum: General discussion
Topic: Will the newest version of Raspbian run on Raspberry Pi 1 Model B Rev 1.2?
Replies: 10
Views: 647

Re: Will the newest version of Raspbian run on Raspberry Pi 1 Model B Rev 1.2?

I want to install the newest version of Raspbian on my old Raspberry Pi 1 Model B Rev 1.2. Will it work even if it will run slowly? I run Raspberry Pi OS on my Raspberry Pi Model B Plus Rev 1.2 and it runs perfectly well. It is no different to the Pi Zero which millions use, which has the same SOC ...
by Milliways
Fri May 07, 2021 11:54 am
Forum: Troubleshooting
Topic: (Bug?) "start_x=1" (and possibly other commands/directives) do not work in an "included" config.txt file.
Replies: 39
Views: 1696

Re: (Bug?) "start_x=1" (and possibly other commands/directives) do not work in an "included" config.txt file.

Maybe I am missing something, but (in the past) I have implemented different config.txt files - I just rename (actually copy) the desired file. I now have a single config.txt file which works on all my Pi (from Pi B to Pi4) using Conditional Filters. No need for complicated includes. The only except...
by Milliways
Fri May 07, 2021 7:34 am
Forum: General discussion
Topic: Which pi is which
Replies: 40
Views: 1849

Re: Which pi is which

gordon77 wrote:
Thu May 06, 2021 9:00 am

The OP said "there is no equipment, power supplies, etc at all here)"...
So he should explain WHY he took it out of the clearly labelled box?
by Milliways
Fri May 07, 2021 1:35 am
Forum: General discussion
Topic: can't access my wifi network... Not a question, just note!
Replies: 2
Views: 145

Re: can't access my wifi network... Not a question, just note!

Hi, I'm a new user of raspberry Pi 4B, and in the last few days I tried to connect it to my wifi network, using different methods (ssh- direct connection with laptop, using LAN cable - attaching external screen and keyboard to the RPi), but all my efforts didn't work. Also, I tried to get the IP of...
by Milliways
Mon May 03, 2021 4:20 am
Forum: General discussion
Topic: Goodbye Raspberry Pi Desktop
Replies: 63
Views: 2738

Vivaldi Browser

I am not going to buy into the discussion about OS, or the foibles of browsers. However I suggest that those unhappy with the behaviour of their browser, or the actions of those who develop the browsers, may wish to try Vivaldi https://vivaldi.com/features/#pk_campaign=sd&pk_kwd=features-en-gb I...
by Milliways
Sun May 02, 2021 11:48 pm
Forum: Beginners
Topic: Cant ssh in new pi
Replies: 20
Views: 561

Re: Cant ssh in new pi

What i don't fully get though is why the security on a closed network Because SSH is Secure. It is built for security. If you don't want security then just install telnetd and use telnet instead of ssh. Then all your data will be transmitted over your local network unencrypted (passwords and logins...
by Milliways
Sun May 02, 2021 2:08 am
Forum: Beginners
Topic: Cant ssh in new pi
Replies: 20
Views: 561

Re: Cant ssh in new pi

"then it asks for password but refuses me with errors about man in the middle attacks"

The IT in this case is your Mac - nothing to do with the Pi, other than the fact that a new installation creates new ssh keys.
by Milliways
Tue Apr 27, 2021 7:19 am
Forum: Off topic discussion
Topic: What size screw driver for Philips and bolts do I need?
Replies: 37
Views: 1609

Re: What size screw driver for Philips and bolts do I need?

I just look at the screw head and select a suitable driver from my set - it isn't hard. I think you will find most screws used on computer systems these days are Pozidriv - easily distinguished because they have parallel flanks and the screws have radial indentations. The holes on Pi boards are M2.5...
by Milliways
Tue Apr 20, 2021 6:44 am
Forum: Compute Module
Topic: Weird GPIO states coming out of reset
Replies: 8
Views: 342

Re: Weird GPIO states coming out of reset

Hi, I'm working with the CM4 running the stock Raspberry Pi OS on a custom host board. When the Pi boots, the GPIO pins are not all in tri-state (input / high-impedance). This is not typical for other SBC's, micros, etc., since there's no way for the system controller to know, at reset, what hardwa...
by Milliways
Tue Apr 20, 2021 12:05 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Resistor or Transistor protection on GPIO
Replies: 11
Views: 533

Re: Resistor or Transistor protection on GPIO

Using electronic devices in a hostile environment does not have a one size fits all solution. The solution needs to understand the environmental risks and apply appropriate solutions. Opto-isolators are an excellent solution, if used correctly. This means NO common connection between input and outpu...
by Milliways
Sat Apr 10, 2021 1:16 am
Forum: Advanced users
Topic: Serial Port in C not working
Replies: 6
Views: 382

Re: Serial Port in C not working

That was it. Thank you. But now I am told wiringpi is a dead project and I should not be using it for new work. So I need to find another library. Plain serial doesn't need a library. It's simple enough to throw a few IOCTLs into open code to get it running. https://www.cmrr.umn.edu/~strupp/serial....

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