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by pwinwood
Mon Sep 14, 2020 3:45 pm
Forum: Troubleshooting
Topic: Fixing incorrect undervoltage warnings
Replies: 37
Views: 1710

Re: Fixing incorrect undervoltage warnings

A mobile phone in close proximity perhaps?
by pwinwood
Fri Jul 17, 2020 4:21 pm
Forum: Troubleshooting
Topic: Undervoltage warnings on Pi 3B
Replies: 9
Views: 362

Re: Undervoltage warnings on Pi 3B

pcmanbob wrote:
Fri Jul 17, 2020 10:05 am

You normally only get a low volt waning when the 5V input to the pi drops below 4.65V.
That's instantaneous under volt (for given values of instantaenous), not something you can always measure with a volt meter!
by pwinwood
Fri Feb 14, 2020 6:14 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Problems with RFID MFRC522 on Rpi4
Replies: 4
Views: 1095

Re: Problems with RFID MFRC522 on Rpi4

If your LCD was interfaced via the GPIO pins, the LCD driver could have claimed the SPI 0 interface and the associated chip enable pins. The RC522 reader also uses SPI 0. As the LCD driver has claimed it the RFID reader will not work. This happened to me in a work context. I used SPI 1 instead for t...
by pwinwood
Thu Feb 13, 2020 9:35 pm
Forum: Raspberry Pi OS
Topic: Broadcom BCM43143/2 not working with Buster
Replies: 0
Views: 212

Broadcom BCM43143/2 not working with Buster

I have just upgraded my Raspberry Pi 2 B to the latest Raspbian release base on Debian Buster. It does not have it's own Wifi adapter so I used a Broadcom red and black thing with two USB ears that I purchased with that Pi. I think that was the standard at the time? After the upgrade It does not con...
by pwinwood
Sat Jul 06, 2019 6:51 pm
Forum: Troubleshooting
Topic: Pi4 Not booting, SDcard/HDD works fine on Pi2
Replies: 6
Views: 498

Re: Pi4 Not booting, SDcard/HDD works fine on Pi2

Having got my Pi 4 to run - not all USB-C power supplies are compatible with the Pi 4 it seems - by getting an official PSU, my Pi 4 also refused to boot to desktop with occasional flashes off the boot screen etc. I just did an 'rpi-update' to the latest (July 4th) kernel etc and it is now working f...
by pwinwood
Fri Jul 05, 2019 1:09 pm
Forum: General discussion
Topic: USB Type C of Pi 4 model B
Replies: 25
Views: 2881

Re: USB Type C of Pi 4 model B

The two cc pins on the USB-C power are connected together to a single pull-down rather than a separate pull-down on each so that some USB-C power supplies do not output anything to power the Pi 4 however the Raspberry Pi USB-C power supply does not have this problem?
by pwinwood
Mon Mar 19, 2018 8:45 pm
Forum: General discussion
Topic: Piserver: cannot install applications on clients
Replies: 3
Views: 727

Re: Piserver: cannot install applications on clients

Yes. 'chroot' is what it does.
by pwinwood
Sun Mar 18, 2018 10:39 pm
Forum: General discussion
Topic: Piserver: cannot install applications on clients
Replies: 3
Views: 727

Re: Piserver: cannot install applications on clients

On the Pi Server there is a menu option to start a 'chroot' into the client filesystem where you can install stuff, update the system. etc.
by pwinwood
Fri Jan 05, 2018 9:54 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Problem with installing libgtk-3-dev on Raspberry Pi Desktop
Replies: 4
Views: 2417

Re: Problem with installing libgtk-3-dev on Raspberry Pi Desktop

ShiftPlusOne wrote:
Fri Jan 05, 2018 1:00 pm
Could you run apt update and try again?
Yes fixed thank you :D

Paul
by pwinwood
Fri Jan 05, 2018 12:49 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Problem with installing libgtk-3-dev on Raspberry Pi Desktop
Replies: 4
Views: 2417

Problem with installing libgtk-3-dev on Raspberry Pi Desktop

I am attempting to build my project on Raspberry Pi Desktop. To achieve this I need to install the gtk 3 development package but there is a dependency problem. >sudo apt-get install libgtk-3-dev Reading package lists... Done Building dependency tree Reading state information... Done Some packages co...
by pwinwood
Tue Dec 19, 2017 8:45 pm
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Raspberry PI desktop on VMware
Replies: 12
Views: 43478

Re: Raspberry PI desktop on VMware

I run Raspberry Pi desktop with VMWare successfully. Have you installed it to a (virtual) hard disk or just booting from the image. I think the only problem I had was the display resolution being reset to the default.
by pwinwood
Wed Jun 15, 2016 8:34 pm
Forum: OpenGLES
Topic: New OpenGL GLUT Benchmark
Replies: 21
Views: 11999

Re: New OpenGL GLUT Benchmark

The CPU ran continuously at 1000 MHz, and OpenGL at 17 FPS, to start with. As the temperature rose, the benchmark’s display disappeared occasionally, to be replaced by the multi-coloured square, seen on booting. moving the mouse restored the display. Multi-coloured square is the under-voltage warni...
by pwinwood
Mon May 02, 2016 3:18 pm
Forum: C/C++
Topic: Visual Studio for Pi development
Replies: 10
Views: 15421

Re: Visual Studio for Pi development

I find "Visual C++ for IoT Development" to be excellent. That's for use with the Win10IoT stuff that you can boot on your RPi (that's existed since the RPi2 was launched). The new VS plugin to build & debug things on Linux using gcc is a million times more exciting. Sorry, no it's got nothing to do...
by pwinwood
Mon May 02, 2016 12:05 pm
Forum: C/C++
Topic: Visual Studio for Pi development
Replies: 10
Views: 15421

Re: Visual Studio for Pi development

In fact there are two Visual Studio extensions now. "Visual C++ for Linux Development" that has already been mentioned. This allows you to configure the command line parameters for the (GCC) compiler and linker within Visual Studio 2015, and the older but renamed "Visual C++ for IoT Development" htt...
by pwinwood
Sun Oct 25, 2015 9:58 pm
Forum: Windows 10 for IoT
Topic: BitArray conversion problem (.CopyTo missing)
Replies: 5
Views: 1242

Re: BitArray conversion problem (.CopyTo missing)

I always use an enum with the [Flags] attribute to declare my bit values and then stuff them in a byte array as required.
by pwinwood
Sat Oct 17, 2015 1:04 pm
Forum: Windows 10 for IoT
Topic: Raspberry Pi IoT Wifi dongles
Replies: 11
Views: 3706

Re: Raspberry Pi IoT Wifi dongles

harshharsh26 wrote:I am trying a Wifi bridge till Windows IoT gets drivers for some more wifi dongles.
.
I have used one of these with my Pi from the start. Works well, good performance. No problems, dropouts, etc.
by pwinwood
Tue Sep 01, 2015 7:50 pm
Forum: Windows 10 for IoT
Topic: WiFi with External Antenna for Windows 10 IoT
Replies: 1
Views: 1024

Re: WiFi with External Antenna for Windows 10 IoT

I use a USB extension cable to escape the Faraday shield the electronics are in.
by pwinwood
Sat May 02, 2015 9:52 pm
Forum: Windows 10 for IoT
Topic: Should Newtonsoft JSON.Net work?
Replies: 5
Views: 2487

Re: Should Newtonsoft JSON.Net work?

The list of unavailable APIs is listed here http://ms-iot.github.io/content/win10/UnavailableApis.htm However I cannot see System.Runtime.Serialization listed there. How did you add a reference to Newtonsoft.Json? Did you use the Package Manager Console in Visual Studio 2015 to add it from nuget to ...
by pwinwood
Sat May 02, 2015 9:32 pm
Forum: Windows 10 for IoT
Topic: IOT with VB
Replies: 13
Views: 20637

Re: IOT with VB

You can certainly create a Windows Universal project with VB.Net
I have tried deploying it to the Pi yet.
by pwinwood
Sat May 02, 2015 9:26 pm
Forum: Windows 10 for IoT
Topic: flashing the SD card in Windows 10 gives error
Replies: 42
Views: 25329

Re: flashing the SD card in Windows 10 error

Why does my SD card have to be 8gb, do you really need all that space? The IoT Core image is under 1gb, the 8gb is meant to give you space to install additional content on your device. The SD card needs to be class 10 because the Windows OS times out with slower cards. Are there any SD cards that a...
by pwinwood
Sat May 02, 2015 9:19 pm
Forum: Windows 10 for IoT
Topic: visual studio 2015 deploy error [solved]
Replies: 16
Views: 6079

Re: visual studio 2015 deploy error

Have you enabled your Windows 10 computer for development using the Group Policy editor

https://msdn.microsoft.com/library/wind ... roupPolicy

?
by pwinwood
Thu Jan 22, 2015 6:03 pm
Forum: Off topic discussion
Topic: Windows 10
Replies: 51
Views: 7930

Re: Windows 10

Frankly, I 'm excited by Windows 10. After I upgraded to Windowa 8.1 on my laptop I thought 'Linux is catching up - this might be the last version of Windows I will install', but what Microsoft are now offering looks good. If you are a professional software engineer who uses Agile (properly not the ...
by pwinwood
Sat Jan 10, 2015 2:01 pm
Forum: Advanced users
Topic: Hard drive (IDE) interface & sketch
Replies: 2
Views: 1518

Re: Hard drive (IDE) interface & sketch

Or something like it. The power supply on mine failed because the two parts of the transformer in it were not glued together. Also there was no input filtering causing interference on the radio!. A replacement proper power supply and it works fine!
by pwinwood
Sun Jan 04, 2015 3:13 pm
Forum: Troubleshooting
Topic: Red is off, green is on, pi is very hot
Replies: 12
Views: 1907

Re: Red is off, green is on, pi is very hot

[quote="DougieLawson]Now explain how to identify the cable.[/quote] An 80 pin IDE cable should has a blue connector on end and a black connector on the other. It may also have a grey connector in the middle. However as they are mass-produced where price is everything, it is not guaranteed that these...
by pwinwood
Sun Jan 04, 2015 12:48 pm
Forum: Troubleshooting
Topic: Red is off, green is on, pi is very hot
Replies: 12
Views: 1907

Re: Red is off, green is on, pi is very hot

DougieLawson wrote: What external markings warn you that it's a "fry your pi" cable?
Don't assume that any old cable is suitable.

To adapt the old adage:

Measure (with a continuity tester) twice, plug in once ;)

Specifically pin 34 on the connector is grounded on the motherboard (blue) end of the cable.

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