Raspberry Pi Forums

mattmiller

Ultrasonic is the only sensor with a narrow enough beam that also has distance sensing abilities.

I'd estimate you'd need 3 per side of bed but maybe 4

What are try to detect approaching the bed?

mattmiller

Not exactly sure where that would be on the layout of the board...

That would be under where the AV socket is once you've successfully removed it without damaging your Pi.....................

mattmiller

I just tried my Pi4 - I pulled the power lead out of the socket on the Pi and put it back in as fast as I could and it rebooted fine Did it again - fine But having said that - I normally do Generally with any electronic equipment you should always completely remove the power for about 10 seconds, ju...

mattmiller

Because it's not dead yet, and how quickly it is buried remains to be seen.

Yes - it'll probably be kept in cold storage for a LONG time!

mattmiller

Why does Raspberry Pi community still insist on using the legacy Python 2 ?

Because of lot of us are dinosaurs and we'll still be using Python 2 until the heat death of the universe

mattmiller

Thanks for the instructions - its working on my Buster install :) One slight bit of confusion is that I didn't understand what this bit was about If you do not use devinput, please execute the following command. Code: Select all sudo mv /etc/lirc/lircd.conf.d/devinput.lircd.conf /etc/lirc/lircd.conf...

mattmiller

From the VNC (tightvnc) window the pull down menu

Using the built in RealVNC server on my Pi4 and using RealVNC viewer from a Win 10 machine - it works fine for me

mattmiller

If you're making it to sell or it'll be installed somewhere difficult to access then put the level shifter in for peace of mind.

Sound advice

I just use mine around the home

mattmiller

It used to be said in the early days but someone rose to the challenge and made it possible

Also, you'll find lots of articles saying you need level-shifters to drive them but I've never done so and not had a problem

I use WS2812 types

mattmiller

But your old card will not work in a Pi4 unless you had upgraded it to Buster before the Pi3B+ failed

[edit]Should have said you'll be able to read files from the card but it won't boot[/edit]

mattmiller

Good luck! Windows networking is a severe PITA. I intermittently but quite frequently can't see the other Windows 10 machines on my network in the Windows network display!

+1
More chance of winning in a game of Global Thermonuclear War

mattmiller

Have a look at https://makers.snips.ai/

mattmiller

purely for interest, what value can you get it up to on your Pi3B+ ?

mattmiller

Ta - that fixed it :) You are aware, of course, that the move from Stretch to Buster is NOT recommended Nope - not seen anything anywhere about that :) TBH I normally don't upgrade from one version to another but I needed to test something out under Buster on this one so went for it. Just for anyone...

mattmiller

I upgraded a Stretch install to Buster - all seems to work but I keep on getting a logon dialog when I reboot

Does anyone know how to get rid of it and go straight to desktop?

: Capture.PNG (78.14 KiB) Viewed 210 times

mattmiller

MQTT is not a continuous protocol - it is for passing discrete messages

mattmiller

but if i add one more RPi to system as a broker,

There is no need to add a 3rd Pi - the mosquitto broker can run on either of your two Pi and both Pi can use it to send/receive messages to each other.

mattmiller

Hi and welcome to the forum

Unless your problem's identical to this one - best idea is to start your own thread and explain what problem your having

mattmiller

Most people use built-in (real) vncserver to remote into their Pi nowadays so that's probably explains lack of response.

JFI Why do you not want to use it?

mattmiller

Not convinced a switch is needed

I think 3 RPİ should be connected with 2 ethernet cable. Am i right?

mattmiller

Can broker behave like a publisher at the same time? The broker is just a running program on one of the machines. Each machine listens and publishes messages to the broker - even the one the broker is running on. The broker does all the message routing I think 3 RPİ should be connected with 2 ether...

mattmiller

Yes - assuming your connecting the two using CAT ethernet cable, then you can just run a broker on one of them and use MQTT to pass data back and forth

mattmiller

I installed NOOBS on a old 4GB micro SD I had lying around. Plugged in a USB3 SSD to my Pi4 and selected it as the drive to install on. /boot ends up on the micro SD, root on the SSD, boots and works fine no tinkering required.

Bloomin heck - finally NOOBS has a use #WhoKnew

mattmiller

The Pi 4B has a different power management circuit which is less susceptible to being killed by shorting the GPIO pins

Have you got a source for that info?

mattmiller

maybe compile it yourself?

https://github.com/samaaron/sonic-pi/bl ... ERRY-PI.md

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