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by hippy
Sun Jul 12, 2020 6:03 pm
Forum: Advanced users
Topic: Cool-retro-term
Replies: 16
Views: 3921

Re: Cool-retro-term

when I ran cool-retro-term, I got a bunch of warnings, then got the window, and then it took about 10 minutes for the command prompt to arrive. When I issue a command, it takes a couple of minutes before the command I typed displays, another several minutes before the results of the command are dis...
by hippy
Sun Jul 12, 2020 4:41 pm
Forum: Advanced users
Topic: Connect serial device to RPi 3
Replies: 21
Views: 580

Re: Connect serial device to RPi 3

I've now connected the RXD port on the Rpi3 to the TXD port on the W800. In that configuration, with a scope across the Rpi3 RXD port I observe a DC level of 0.05 V, and noise of about 0.1 V with occasional peaks approaching 0.18 V . I would not worry about such low level of noise. The bigger quest...
by hippy
Sun Jul 12, 2020 12:50 pm
Forum: Troubleshooting
Topic: Backend terminated or disconnected.Fatal Python error: Segmentation fault
Replies: 5
Views: 112

Re: Backend terminated or disconnected.Fatal Python error: Segmentation fault

That 'backend' appears to be a part of Thonny so it would be worth running your Python program from the command line rather than through Thonny.

If it comes down to a bug within Thonny; doing this will side-step that. And, if not, it may better reveal what the underlying issue is.
by hippy
Sun Jul 12, 2020 12:22 pm
Forum: Troubleshooting
Topic: HDMI>VGA-adapter works with Pi 4 but not Zero?
Replies: 16
Views: 363

Re: HDMI>VGA-adapter works with Pi 4 but not Zero?

Does this mean that you can actually destroy a Pi Zero simply by using a HDMI>VGA-adapter? Someone from the RPT/RPF would have to answer that. Or someone with a 'Sacrificial Zero' could put it to the test. Also, could the reason that the adapter doesn't work with the Pi Zero or my newer laptop be t...
by hippy
Sun Jul 12, 2020 11:54 am
Forum: Troubleshooting
Topic: Backend terminated or disconnected.Fatal Python error: Segmentation fault
Replies: 5
Views: 112

Re: Backend terminated or disconnected.Fatal Python error: Segmentation fault

File "/usr/lib/python3/dist-packages/thonny/backend.py", line 1272 in _execute_prepared_user_code File "/usr/lib/python3/dist-packages/thonny/backend.py", line 1259 in execute_source File "/usr/lib/python3/dist-packages/thonny/backend.py", line 815 in _execute_source File "/usr/lib/python3/dist-pac...
by hippy
Sun Jul 12, 2020 11:38 am
Forum: Advanced users
Topic: Cool-retro-term
Replies: 16
Views: 3921

Re: Cool-retro-term

These are my notes for getting cool-retro-term working on my Pi 3B (non-plus) under Raspberry Pi OS Buster 32-bit a few weeks ago - sudo apt install build-essential qmlscene qt5-qmake qt5-default qtdeclarative5-dev qml-module-qtquick-controls qml-module-qtgraphicaleffects qml-module-qtquick-dialogs ...
by hippy
Sat Jul 11, 2020 6:54 pm
Forum: Beginners
Topic: Can the Pi 4 communicate over the USB C port?
Replies: 5
Views: 206

Re: Can the Pi 4 communicate over the USB C port?

You say the USB C socket can be configured as USB 2.0 host or client. Does that mean I will only get USB 2.0 speeds? Yes. Would I get better speeds using one of the USB 3 ports instead? Yes, but it won't do you any good as the Pi's USB 3 ports cannot be configured for client use. You could possibly...
by hippy
Sat Jul 11, 2020 6:08 pm
Forum: Beginners
Topic: Help in Building a new OS for car infotainment system
Replies: 5
Views: 126

Re: Help in Building a new OS for car infotainment system

As others have said; you probably don't need to build a new OS for your project, can use the default Raspberry Pi OS and build on top of that. That I believe would be the best way to start - Get it working then start optimising and fiddling with it. You could look at PiCore, DietPi or NARD to see if...
by hippy
Sat Jul 11, 2020 5:48 pm
Forum: Troubleshooting
Topic: HDMI>VGA-adapter works with Pi 4 but not Zero?
Replies: 16
Views: 363

Re: HDMI>VGA-adapter works with Pi 4 but not Zero?

I have no idea what power the various Pi's can supply on their HDMI but I chose not to take the risk. The A+ and B+ use an AP2331W chip with a max 200mA rating. From the 2B onwards they all appear to use an RT9741CGV chip with a max 700mA rating and, though not on the schematic, the 4B seems likely...
by hippy
Sat Jul 11, 2020 2:24 pm
Forum: Beginners
Topic: P3B+, Get the USB port name
Replies: 8
Views: 3824

Re: P3B+, Get the USB port name

I also get a file in the /Dev folder called 'ttyACM0'. /dev/ttyAMA0 is normally a device which is exposed on the Pi's 40-way connector Just noticed that's /tty ACM 0 not the /tty AMA 0 my brain converted it to so, /dev/ttyACM0 is probably what you need to use. Perhaps detail the faults you get when...
by hippy
Sat Jul 11, 2020 2:21 pm
Forum: Beginners
Topic: P3B+, Get the USB port name
Replies: 8
Views: 3824

Re: P3B+, Get the USB port name

WvZ wrote:
Sat Jul 11, 2020 2:13 pm
Thank you for this. Where do I type in Isusb? In a terminal command?

Also, how do I run the program you supplied? Must I copy paste and save it as a py file and then run it in terminal?
Yes, to both.
by hippy
Sat Jul 11, 2020 2:04 pm
Forum: Beginners
Topic: P3B+, Get the USB port name
Replies: 8
Views: 3824

Re: P3B+, Get the USB port name

I have a RS845 to USB adapter and the USB is plugged into my Pi ZeroW. I am trying to find out what the port is called so that I can use it in a pymodbus script. I also get a file in the /Dev folder called 'ttyACM0'. /dev/ttyAMA0 is normally a device which is exposed on the Pi's 40-way connector so...
by hippy
Sat Jul 11, 2020 1:02 pm
Forum: Off topic discussion
Topic: Pis...the answer is Pis!
Replies: 22
Views: 820

Re: Pis...the answer is Pis!

But there are alternatives, these same children can go to school, they've been open for them. for the most in need. they haven't shut. In the UK that is not correct. Some schools have remained partially open to cater for children of key workers and the vulnerable but they are not open to everyone. ...
by hippy
Sat Jul 11, 2020 12:43 pm
Forum: Beginners
Topic: How do i change the time
Replies: 4
Views: 138

Re: How do i change the time

You can use the 'date' command at the command line. 'date --help' will provide more details on the options.
by hippy
Sat Jul 11, 2020 12:41 pm
Forum: Troubleshooting
Topic: GPIO input unresponsive at startup
Replies: 2
Views: 47

Re: GPIO input unresponsive at startup

Without some sort of loop at the end of the program it has probably ended and is no longer executing. You probably need something like ...

Code: Select all

import time

... your code ...

while True:
  time.sleep(1)
  
by hippy
Sat Jul 11, 2020 12:36 pm
Forum: Troubleshooting
Topic: I need help I have a problem trying to run apps/games downloaded from the internet.
Replies: 9
Views: 271

Re: I need help I have a problem trying to run apps/games downloaded from the internet.

When I pressed enter I got this message: bash: ./FILENAME: cannot execute binary file: Exec format error Sounds like you have an app which is not intended to run on the Raspberry Pi ARM system. You can use "file ./FILENAME" to find out more about what the app is intended for. If it shows X86, AMD64...
by hippy
Sat Jul 11, 2020 12:30 pm
Forum: Troubleshooting
Topic: Backend terminated or disconnected.Fatal Python error: Segmentation fault
Replies: 5
Views: 112

Re: Backend terminated or disconnected.Fatal Python error: Segmentation fault

Harjeet Singh wrote:
Sat Jul 11, 2020 8:15 am
Same script some times works well on new Pi and some time gives ----Backend terminated or disconnected.Fatal Python error: Segmentation---fault. :roll:
Are there any other messages before that, such as "ENOMEM" or anything else ?

Perhaps post a full console transcript of what is shown.
by hippy
Fri Jul 10, 2020 11:19 pm
Forum: General discussion
Topic: RPi to old TV set up...
Replies: 22
Views: 533

Re: RPi to old TV set up...

What I want to know is, WTAF were they thinking connecting the chassis to neutral Easiest way to get a high voltage with respect to Neutral -- or what some would insist these days is "ground" ;) I believe some did not have the chassis direct to Neutral but used a virtual chassis derived from rectif...
by hippy
Fri Jul 10, 2020 9:19 pm
Forum: General discussion
Topic: Linux WIFI Not Supported by Spectrum/Charter?
Replies: 29
Views: 703

Re: Linux WIFI Not Supported by Spectrum/Charter?

Except emma has said that the Pi does not work with said router ... Which to my mind makes the product unfit for purpose and deserves a refund. Without wishing to cause any offence to emma ... So long as it is unfit for purpose, that it's not a user or configuration issue, or a problem with the Pi ...
by hippy
Fri Jul 10, 2020 9:05 pm
Forum: General discussion
Topic: RPi to old TV set up...
Replies: 22
Views: 533

Re: RPi to old TV set up...

Dazzathedrummer wrote:
Fri Jul 10, 2020 8:52 pm
There’s a red button on the back that cuts the whole thing off - I guess that’s some kind of panic button!
Possibly a resettable fuse for when things do go bad.
by hippy
Fri Jul 10, 2020 8:18 pm
Forum: General discussion
Topic: Linux WIFI Not Supported by Spectrum/Charter?
Replies: 29
Views: 703

Re: Linux WIFI Not Supported by Spectrum/Charter?

But it should be possible to have it listed as unsupported but unofficially still work. As mentioned above they could simply adopt a 'hands off' policy on tech support. Which seems to be exactly how it is from the actual "not supported" web page linked to from my reading between the lines; "use one...
by hippy
Fri Jul 10, 2020 6:01 pm
Forum: Off topic discussion
Topic: Worst "production" Pi installation
Replies: 17
Views: 572

Re: Worst "production" Pi installation

As seen on Firefox and Chrome on my XP system, Firefox and Chrome on Android, Firefox and, most importantly, Chromium on my Pi 3B and 4B ... BODGE.jpg Windows 7 does however show it hanging on the cable using Firefox, Chrome, Opera and Edge. It might be a 'responsive web page' issue because the thre...
by hippy
Fri Jul 10, 2020 4:45 pm
Forum: Off topic discussion
Topic: Worst "production" Pi installation
Replies: 17
Views: 572

Re: Worst "production" Pi installation

W. H. Heydt wrote:
Fri Jul 10, 2020 4:32 pm
hippy wrote:
Fri Jul 10, 2020 4:04 pm
...or just left it dangling on the ethernet cable :D
It *is* just dangling from the Ethernet cable.
Ah, right; the image is rotated when shown in the forum. I thought the ethernet and sensor cable had just been pulled tight, hadn't figured that was gravity doing its thing.
by hippy
Fri Jul 10, 2020 4:24 pm
Forum: General discussion
Topic: RPi to old TV set up...
Replies: 22
Views: 533

Re: RPi to old TV set up...

A/V jack to phono, then phono to RF is what you need. Can't recall what the spec would need to be but I also believe it should be UHF rather than VHF in the UK; 400-800MHz (ish). You don't say where you are so it might be different for you. I have tended to use camcorder RF adapters and satellite re...
by hippy
Fri Jul 10, 2020 4:04 pm
Forum: Off topic discussion
Topic: Worst "production" Pi installation
Replies: 17
Views: 572

Re: Worst "production" Pi installation

Also looks fine to me. They have used proper twist-connectors for joining what I guess are the sensor wires rather than simply twisting wires together, with maybe insulation or masking tape, or choc-block, seem to have mounted it in a case base. I would perhaps have hung the bare board on a nail thr...

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