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by mattmiller
Sun Jan 19, 2020 4:03 pm
Forum: General discussion
Topic: Raspberry Pi 4 usb boot?
Replies: 458
Views: 134109

Re: Raspberry Pi 4 usb boot?

by mattmiller
Thu Jan 16, 2020 9:55 pm
Forum: General discussion
Topic: Github
Replies: 8
Views: 209

Re: Github

The command works for me (I also noted the repository is deprecated BTW)

I'd try and reboot your router and then your Pi
by mattmiller
Wed Jan 15, 2020 3:54 pm
Forum: General discussion
Topic: How bad/good is cooling on the Raspberry pi 4?
Replies: 47
Views: 1795

Re: How bad/gpod is cooling on the Raspberry pi 4?

When the Pi4 1st came out - it ran very hot

Its software has been vastly improved and now its fine

I run mine flat inside in the bottom half of a plastic case and its fine.
by mattmiller
Mon Jan 13, 2020 10:41 pm
Forum: Scratch
Topic: Scratch 3 Desktop for Raspberry Pi desktop
Replies: 3
Views: 279

Re: Scratch 3 Desktop for Raspberry Pi desktop

Don't re-ask - Its fine asking that here - the mods will move it if they think it needs doing
by mattmiller
Sat Jan 11, 2020 5:04 pm
Forum: Troubleshooting
Topic: Help Troubleshooting why Pi Zero got hot enough to melt case
Replies: 2
Views: 134

Re: Help Troubleshooting why Pi Zero got hot enough to melt case

There was a storm last night and the power did flash on and off very quickly.
I think you need look no further than that for cause and effect

Time for new Pi and new PSU :(
by mattmiller
Fri Jan 10, 2020 7:48 pm
Forum: Beginners
Topic: Pi Zero add Battery
Replies: 15
Views: 669

Re: Pi Zero add Battery

Can any one suggest me a different solution to connect a small battery like that to the PI ? You can buy big USB battery chargers and a Y cable and hot swap them over Or although you COULD damage your Pi - you might want to consider running it from 4 NiMH batteries (which are nominal 1.2V cells) - ...
by mattmiller
Fri Jan 10, 2020 3:42 pm
Forum: Automation, sensing and robotics
Topic: Pi somehow control wifi light dimmer ?
Replies: 11
Views: 531

Re: Pi somehow control wifi light dimmer ?

All the commercial products go out of their way to NOT allow direct LAN control by the likes of us. At what most of us would consider a reasonable price All solutions to doing this cheaply are bodges and the manufactures work hard to stop the bodges from working Having said that, they recently said ...
by mattmiller
Mon Jan 06, 2020 8:40 pm
Forum: Automation, sensing and robotics
Topic: HC-SR04 ultrasonic distance module won't read any further than 100cm
Replies: 8
Views: 438

Re: HC-SR04 ultrasonic distance module won't read any further than 100cm

To improve reliability you can desolder the speaker from the sensor board and use a 2m long audio cable to have the speaker on the opposite side of the gate.
Interesting :)

Have you actually tried this?

And which one is the speaker?
by mattmiller
Mon Jan 06, 2020 8:29 pm
Forum: Advanced users
Topic: Odd routing, cannot force 4b Pi to 2.4 GHz wifi (wpa_supplicant)
Replies: 12
Views: 386

Re: Odd routing, cannot force 4b Pi to 2.4 GHz wifi (wpa_supplicant)

:-)
[edit]Absolutely none taken - I knew what you meant :) [/edit]
by mattmiller
Mon Jan 06, 2020 8:09 pm
Forum: Advanced users
Topic: Odd routing, cannot force 4b Pi to 2.4 GHz wifi (wpa_supplicant)
Replies: 12
Views: 386

Re: Odd routing, cannot force 4b Pi to 2.4 GHz wifi (wpa_supplicant)

I've no idea myself but hopefully there is a way of disabling the 5Ghz part of the inbuilt WiFi.

One solution might be to buy a separate 2.4GHz dongle and just completely disable the internal
by mattmiller
Mon Jan 06, 2020 7:42 am
Forum: Beginners
Topic: Power supply for Raspberry Pi 3 Model B +
Replies: 9
Views: 289

Re: Power supply for Raspberry Pi 3 Model B +

Your right - the Pi exceeds the specification of a microUSB port

It almost never causes a real issue.

This is one of the reasons that the new Pi4 uses USB-C instead
by mattmiller
Sat Jan 04, 2020 9:40 pm
Forum: Raspbian
Topic: where is the boot section to write the SSH file
Replies: 12
Views: 446

Re: where is the boot section to write the SSH file

An easier way to get to disk management is to type "partition" in the Windows 10/Cortana search box and click on, Create and format hard disk partitions.
Useful info - ta :)
by mattmiller
Sat Jan 04, 2020 5:40 pm
Forum: Raspbian
Topic: where is the boot section to write the SSH file
Replies: 12
Views: 446

Re: where is the boot section to write the SSH file

If things are working on your Win10 machine, then after you have setup you card using Etcher - if you eject and stick it back in (ignore any messages) you should have a drive letter available that you can read/write to - this is the "boot" section of the card JFI - This used to work on my Win10 mach...
by mattmiller
Fri Jan 03, 2020 10:10 am
Forum: Troubleshooting
Topic: Raspberry-pi 3A+ crashes when using Firmata
Replies: 4
Views: 187

Re: Raspberry-pi 3A+ crashes when using Firmata

The first thing to try is to edit/view your Node-RED from a browser running on another computer rather than the Pi itself.

Also, can you paste your flow for us to look at prob best using something like pastebin.com and post link to it here as they can be quite big
by mattmiller
Wed Jan 01, 2020 6:16 pm
Forum: Troubleshooting
Topic: System crash on install RPIO module....
Replies: 1
Views: 102

Re: System crash on install RPIO module....

Python RPIO is a very old module that not been maintained for a number of years

You need to use one of the other GPIO python modules e.g RPi.GPIO and pigpio being the most commonly used and they are well supported
by mattmiller
Tue Dec 31, 2019 9:51 pm
Forum: General discussion
Topic: Does a MQTT broker store topics?
Replies: 2
Views: 133

Re: Does a MQTT broker store topics?

All clients subscribed to a topic on the broker are sent any messages that are published to that topic The broker keeps track of who is subscribed to what and sends updates out accordingly Although a client can unsubscribe from topics (but still stay connected to the broker) its not a common operati...
by mattmiller
Sat Dec 28, 2019 9:03 pm
Forum: Beginners
Topic: What I learned setting up my first Pi in a long time
Replies: 31
Views: 1349

Re: What I learned setting up my first Pi in a long time

Best post I've seen on these forums :)
by mattmiller
Sat Dec 28, 2019 8:54 am
Forum: Python
Topic: Any speed penalties in python for achieving a GPIO task?
Replies: 6
Views: 284

Re: Any speed penalties in python for achieving a GPIO task?

All applications needs vary

If you know Python - then use it to prototype your application

If its not fast enough - move over to native C

I've been using Pi since the beginning and never run into speed issues in reading sensors and controlling motors and servos
by mattmiller
Fri Dec 27, 2019 10:47 am
Forum: Troubleshooting
Topic: Installing PiBits require username and password
Replies: 1
Views: 136

Re: Installing PiBits require username and password

It does look like Github now require people to signup

PS your link is wrong -should be

Code: Select all

git clone https://github.com/richardghirst/PiBits.git
by mattmiller
Fri Dec 27, 2019 9:53 am
Forum: Troubleshooting
Topic: WS2812B lights flashing randomly
Replies: 6
Views: 246

Re: WS2812B lights flashing randomly

As well as your data line connection, have you connected GND from the Pi to the GND connection of your strip?
by mattmiller
Sun Dec 22, 2019 8:37 am
Forum: Automation, sensing and robotics
Topic: I2C on PI stop working?
Replies: 2
Views: 238

Re: I2C on PI stop working?

[edit] Sorry - didn't see that it works with another Pi [/edit]
by mattmiller
Fri Dec 20, 2019 11:22 am
Forum: Beginners
Topic: Stupid question about GPIO floating state
Replies: 23
Views: 956

Re: Stupid question about GPIO floating state

I think it is dumb because seems that this is a very first step to play with the GPIO Aah - that's a different point :) GPIO stands for GENERAL PURPOSE input output Everyone has a different requirement as to what the pins are used for So tying them up or down as a default would not suit the purpose...
by mattmiller
Fri Dec 20, 2019 7:21 am
Forum: Beginners
Topic: Stupid question about GPIO floating state
Replies: 23
Views: 956

Re: Stupid question about GPIO floating state

The pull-down (or pull-up) only sets the input to low or high in the absence of a real signal. Once you apply a 3V signal to the input, it will go high If working in a harsh RF enviorment, it is normal practice to add extra external pull up/down resistors of a lower value than the nominal 50K intern...
by mattmiller
Tue Dec 17, 2019 12:40 pm
Forum: Troubleshooting
Topic: RealVNC has suddenly become flaky
Replies: 9
Views: 339

Re: RealVNC has suddenly become flaky

I use a robust DNS server on my network and I've NEVER had a problem using names.
Even through the great windows 6 month mDNS failure in 2018? (or was it 2017 - my mind slips)
I use a robust DNS server on my network
Which one's that?
by mattmiller
Mon Dec 16, 2019 2:50 pm
Forum: Troubleshooting
Topic: RealVNC has suddenly become flaky
Replies: 9
Views: 339

Re: RealVNC has suddenly become flaky

One thing I've noticed over the years is that using VNC to connect to my Pi from my Windows machine is that using names can be a problem but ip addresses always work

It might be just windows going thru one of its phases with LAN names

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