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by MarkDH102
Wed Dec 01, 2021 7:20 am
Forum: General discussion
Topic: Powering Pi4 from Dual USB/Mains switched power socket (UK)
Replies: 8
Views: 293

Re: Powering Pi4 from Dual USB/Mains switched power socket (UK)

Thank you for all of your replies. I do concur. I have been thinking about using one for a while but I have always had safety/reliability thoughts. I will stick with what I've got. All I wanted to do was get rid of a power block. I have a double socket next to my Pi. Ethernet over mains plug (no plu...
by MarkDH102
Tue Nov 30, 2021 3:05 pm
Forum: General discussion
Topic: Powering Pi4 from Dual USB/Mains switched power socket (UK)
Replies: 8
Views: 293

Powering Pi4 from Dual USB/Mains switched power socket (UK)

I've been looking at dual mains switched sockets that come with dual USB chargers (3.1A total between the 2 USB's). On the site I was looking at someone asked directly if the Pi4 would be OK on one socket while nothing in the other. The answer was a yes. Has anyone tried this? I can't believe that t...
by MarkDH102
Fri Nov 26, 2021 7:18 am
Forum: Advanced users
Topic: connecting Raspberry pi to many Arduino controllers
Replies: 6
Views: 254

Re: connecting Raspberry pi to many Arduino controllers

You could look at ESP8266 instead of Arduino. Comes with WiFi. Then use MQTT to communicate with the Pi.
by MarkDH102
Mon Nov 22, 2021 7:27 am
Forum: General discussion
Topic: Linux vs Windows
Replies: 116
Views: 3737

Re: Linux vs Windows

One huge difference for me is the update process. Windows - absolute nightmare and takes ages if it works at all sometimes. Number of times I've had to run this then that then the other to get it updating again. Linux - especially Pi OS normally takes a couple of minutes tops and has (so far) never ...
by MarkDH102
Wed Nov 17, 2021 7:19 am
Forum: General discussion
Topic: Racing Car Data Capture & Analysis Program
Replies: 16
Views: 650

Re: Racing Car Data Capture & Analysis Program

One thing I noticed when viewing logged GPS data from my car testing is the GPS mapping software could tell which side of the road I was on, but when I got home the my parked car just wandered all over the place :lol: That was my experience too. uBlox receiver. I was also interested in elevation da...
by MarkDH102
Fri Nov 12, 2021 7:27 am
Forum: General discussion
Topic: Racing Car Data Capture & Analysis Program
Replies: 16
Views: 650

Re: Racing Car Data Capture & Analysis Program

I logged the data from my humble 12 year old SEAT Leon FR. I used an ESP32 + inbuilt OLED (Heltec) with SD card, GPS, accelerometer, environmental sensors and most importantly a link to a BT dongle (Vgate) that plugged into my ODB port. I debugged it all by writing a very simple CANBUS simulator on ...
by MarkDH102
Thu Nov 11, 2021 7:26 am
Forum: General discussion
Topic: Interesting use for 450 raspberry pi's!
Replies: 25
Views: 1125

Re: Interesting use for 450 raspberry pi's!

Here is the part of the article in the Sunday Times that started the ball rolling...
If I'm breaking any copyright rules then fell free to remove this post.

https://www.dropbox.com/s/lis7qao9rlht9 ... 7.JPG?dl=0
https://www.dropbox.com/s/nhs6sjy7ek1oj ... 0.JPG?dl=0
by MarkDH102
Wed Nov 10, 2021 2:41 pm
Forum: General discussion
Topic: Interesting use for 450 raspberry pi's!
Replies: 25
Views: 1125

Re: Interesting use for 450 raspberry pi's!

I had the same thoughts. Plus, isn't running 450 Pi's a bit of a waste of energy when a single unit with far more computing power will 'probably' take less to power it in the first place. I assume if you keep the Pi's cool and don't overclock, then they should last for a good while. Solid state unli...
by MarkDH102
Wed Nov 10, 2021 12:37 pm
Forum: General discussion
Topic: Interesting use for 450 raspberry pi's!
Replies: 25
Views: 1125

Interesting use for 450 raspberry pi's!

Just read about this company in the Sunday Times.

Thermify

https://gov.wales/welsh-government-attr ... team-wales
by MarkDH102
Wed Oct 20, 2021 4:22 pm
Forum: Beginners
Topic: SOLVED how to display images in Claws
Replies: 4
Views: 148

Re: how to display images in Claws

I used to use Claws, and had issues with the Dillo plugin and displaying images
You could try Thunderbird which works fine for me on a Pi3B 32 bit Buster and a Pi4 8GB (64bit PiOS).
Initialisation is slower than Claws but everything else works really well.
by MarkDH102
Wed Oct 06, 2021 6:24 am
Forum: General
Topic: Can no longer debug Pico from VS Code
Replies: 7
Views: 563

Re: Can no longer debug Pico from VS Code

Greg

Code: Select all

Nuke the flash memory?
Thanks for helping - i'd already tried that one.
I've given up. I'll stick to my other microcontrollers.
And I so wanted to make use of the PIO...

BR Mark
by MarkDH102
Tue Oct 05, 2021 9:36 am
Forum: General
Topic: Can no longer debug Pico from VS Code
Replies: 7
Views: 563

Re: Can no longer debug Pico from VS Code

Could really do with some help on this. I've now tried my second Pico with exactly the same results. I've tried a new USB cable. I've changed the 3 SWD wires for new ones from a different manufacturer. I've removed the Pico from the breadboard. There is nothing attached to it now apart from the head...
by MarkDH102
Mon Oct 04, 2021 2:25 pm
Forum: General
Topic: Can no longer debug Pico from VS Code
Replies: 7
Views: 563

Re: Can no longer debug Pico from VS Code

I may have a completely different problem then. If I can see my Pico as a drive in the file manager and drag and drop to it and have it work (blink example), is it still possible that the SWD interface could be shot? I've never done anything untoward with it. The SWD wires have been plugged - unused...
by MarkDH102
Sun Oct 03, 2021 6:30 am
Forum: General
Topic: Can no longer debug Pico from VS Code
Replies: 7
Views: 563

Re: Can no longer debug Pico from VS Code

Greg-R Didn't work for me unfortunately. But I get a lot more output now. I use jumper cables for the SWD and am reluctant to solder shorter ones directly to the pins as the Pi4 is my daily driver PC. I can see the extension has installed correctly. Are there any settings that need to be changed? p...
by MarkDH102
Sat Oct 02, 2021 9:39 am
Forum: General
Topic: Can no longer debug Pico from VS Code
Replies: 7
Views: 563

Can no longer debug Pico from VS Code

Pi4 64 bit Raspberry OS BETA. (Which I update every day). My SWD cable is about 6 inches long. But I tried a different one too, to no effect. It was all working a couple of months ago. I put it down for a while due to health issues. Now I can't get the debugger working at all. This is the output fro...
by MarkDH102
Thu Sep 30, 2021 10:27 am
Forum: General discussion
Topic: Pi4 trying to use Echo Dot 4 as a SPEAKER for the Pi.
Replies: 0
Views: 182

Pi4 trying to use Echo Dot 4 as a SPEAKER for the Pi.

I can connect to the Echo DOT, but all I see is a SOURCE device (input) in the audio mixer control panel. It did work ONCE as a speaker a couple of days ago, but ever since everything was powered down then up again, it is no longer recognised as a SINK, no matter what order I power things up in. Als...
by MarkDH102
Mon Sep 27, 2021 7:47 am
Forum: General discussion
Topic: pcmanfm spewing gigabytes of errors to run.log
Replies: 29
Views: 1608

Re: pcmanfm spewing gigabytes of errors to run.log

jamesh Do get them if the usb drive is not attached. No I don't. There's the answer then...but why so many warnings in such a short space of time? Hawaiian Pi The only warnings I have are about xscreensaver not launching because it can't be found (odd, since I've never installed or used xscreensaver...
by MarkDH102
Mon Sep 27, 2021 6:28 am
Forum: General discussion
Topic: pcmanfm spewing gigabytes of errors to run.log
Replies: 29
Views: 1608

Re: pcmanfm spewing gigabytes of errors to run.log

I too get these errors. But only at boot up and maybe a couple of hundred of them consecutively over a period of a few ms as the first entries in the log. My log is 63kB. I have a Pi4 8GB PiOS 64 bit Beta. Ethernet connection. USB Keyboard & Mouse attached and also a Samsung external 500GB USB d...
by MarkDH102
Mon Sep 20, 2021 4:03 pm
Forum: General discussion
Topic: Rpi 4 micro HDMI
Replies: 8
Views: 536

Re: Rpi 4 micro HDMI

I have a 'similar' problem only using Kodi. Only my switch box is a commercial Yamaha Receiver/Amplifier. Pi3 worked, Pi4 doesn't...

viewtopic.php?f=63&t=319372&p=1911797#p1911797

Sorry if this is considered a hijack...
by MarkDH102
Sat Sep 18, 2021 10:38 am
Forum: Beginners
Topic: Switch screen off
Replies: 19
Views: 821

Re: Switch screen off

Look at the data sheet https://www.mouser.co.uk/datasheet/2/45 ... 525481.pdf, schematics page. There is a signal 'Backlight' which controls Q2. That signal is under control of the Processor, so it should be possible to dimm/switch of the backlight I turn the backlight off via a serial command. I p...
by MarkDH102
Sat Sep 18, 2021 6:23 am
Forum: Beginners
Topic: Switch screen off
Replies: 19
Views: 821

Re: Switch screen off

I do exactly the same as the OP and use the following screen attached to a pi0W. Very low power requirements. Touchscreen display is uLCD-32WPTU from 4D systems It is 320*240 colour 3.2". I drive it via the serial port. It is now obsolete but I bet you can pick them up on ebay - or get a newer ...
by MarkDH102
Fri Sep 10, 2021 3:54 pm
Forum: Beginners
Topic: From breadboard to a real thing
Replies: 7
Views: 405

Re: From breadboard to a real thing

If using veroboard, use an old drill bit (or special track cutter) to cut the copper tracks where you need to.
Yes, I use a drill bit. But I used a new one. I twist it by hand, so the sharper the better!
by MarkDH102
Fri Sep 10, 2021 3:51 pm
Forum: General discussion
Topic: Pi4 HDMI pass through an amplifier to an Ultra HD TV
Replies: 0
Views: 158

Pi4 HDMI pass through an amplifier to an Ultra HD TV

I have a Pi4 running the latest OSMC (Kodi 19). I also have a Yamaha RXV500D AV receiver/amp https://europe.yamaha.com/en/products/audio_visual/av_receivers_amps/rx-v500d/specs.html#product-tabs The specs state : 4K Ultra HD Pass-through YES I have a Samsung 2020 ultra HD TV with it's own special co...
by MarkDH102
Fri Sep 10, 2021 6:20 am
Forum: Beginners
Topic: From breadboard to a real thing
Replies: 7
Views: 405

Re: From breadboard to a real thing

I will second the use of veroboard. For the simple reason that soldered connections are 100% reliable (if done correctly!) You could be chasing random problems all the time with potentially loose connections on a breadboard especially if the containing box is moved around a lot. I design my veroboar...
by MarkDH102
Tue Sep 07, 2021 6:23 am
Forum: Python
Topic: Reading Serial with Threads
Replies: 1
Views: 379

Re: Reading Serial with Threads

Do you need a short delay

Code: Select all

time.sleep(0.001)
In your

Code: Select all

readVideo() 

Code: Select all

while True 
loop?

I don't know if the thread will yield to other processes otherwise. But I'm not an expert.

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