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by TideMan
Fri May 28, 2021 2:33 am
Forum: General discussion
Topic: Remote Desktop Application Recommendations
Replies: 6
Views: 698

Re: Remote Desktop Application Recommendations

RealVNC works great within the LAN, but if you want to access a pi outside the LAN, you'll need something like remote.it as well. You can set it up either as Peer-to-Peer or through the remote.it servers. I prefer the former. It works well for SSH, but RealVNC can be a bit clunky if you have a slow ...
by TideMan
Tue May 25, 2021 3:27 am
Forum: General programming discussion
Topic: Is there any unique serial number on rpi machine?
Replies: 14
Views: 2568

Re: Is there any unique serial number on rpi machine?

There's the MAC address:
B8:27:EB:xx:xx:xx for RPi 3 and less
DC:A6:32:xx:xx:xx for RPi 4

The xx:xx:xx sequence of hex numbers is unique.

One easy way to get them is using Fing.
by TideMan
Mon Mar 08, 2021 3:34 am
Forum: Beginners
Topic: A comparison between the Pico and an Arduino Uno
Replies: 2
Views: 280

Re: A comparison between the Pico and an Arduino Uno

That's a very informative article, thank you.

But you didn't mention that you can use Arduino straight out of the box, whereas with Pico, you must solder the pins in first.
The idea of wielding a soldering iron anywhere near a computer has been a major put-off for me.
by TideMan
Sun Feb 28, 2021 1:05 am
Forum: General discussion
Topic: Delay boot up after power is restored
Replies: 6
Views: 836

Re: Delay boot up after power is restored

klricks wrote:
Sat Feb 27, 2021 10:43 pm
You might try enabling the wait for network at boot option in sudo raspi-config...
Exactly what I was looking for.
Thanks cleverca22 and klricks
by TideMan
Sat Feb 27, 2021 9:46 pm
Forum: General discussion
Topic: Delay boot up after power is restored
Replies: 6
Views: 836

Delay boot up after power is restored

I have an RPi 3B+ running a weather station in a remote location. There are frequent power cuts. When the power is restored, the RPi boots up before the modem has finished doing its thing, so the RPi has nowhere to get the time from. It assumes the time is what it was when the power went off. This i...
by TideMan
Wed Jan 20, 2021 9:56 pm
Forum: Python
Topic: Soil moisture sensors and a MCP3008
Replies: 6
Views: 457

Re: Soil moisture sensors and a MCP3008

Just a warning if you're planning to use the Adafruit Stemma Soil Moisture Monitor:
https://www.adafruit.com/product/4026

It simply does not work. In my tests, there was no difference between wet and dry soil. An utter waste of money.
by TideMan
Thu Dec 03, 2020 7:31 pm
Forum: Off topic discussion
Topic: Any "gnuplot" users out there?
Replies: 6
Views: 751

Re: Any "gnuplot" users out there?

I've used gnuplot extensively in my website: www.tideman.kiwi.nz To get help, I just use Google with searches like "gnuplot multiaxis". You usually get lots of hits. I got started using this text: "Gnuplot in Action" by Philipp K Janert, but I quickly grew out of it and I haven't...
by TideMan
Thu Oct 29, 2020 8:18 pm
Forum: Beginners
Topic: Pi4 + HAT = overheating?
Replies: 3
Views: 279

Re: Pi4 + HAT = overheating?

I've had a Sense HAT attached to a Pi4B for more than a year with no problems. Attached plot shows the temp range from the Sense HAT for a few days compared to temps from a weather station alongside. You can see that they track each other quite well, but there are daily spikes in the Sense HAT recor...
by TideMan
Tue Oct 20, 2020 3:24 am
Forum: General discussion
Topic: What's the broadcast
Replies: 13
Views: 853

Re: What's the broadcast

I avoided all this hassle, by simply setting the static IP in the router.
by TideMan
Sun Aug 02, 2020 9:37 pm
Forum: Beginners
Topic: What Raspberry Pi should I buy?
Replies: 14
Views: 874

Re: What Raspberry Pi should I buy?

I'm guessing he's from New Zealand, from his userid. I recommend he use Element 14 which supplies goods to NZ out of Singapore - next day service, or a few days depending on stocks. RPi 4B+ 2GB is NZ$64, with free delivery if your order is more than NZ$100's worth. Adding case, HDMI cable, & PSU...
by TideMan
Thu Jul 30, 2020 8:39 pm
Forum: General discussion
Topic: Raspberry as an all around the world transmitter?
Replies: 8
Views: 646

Re: Raspberry as an all around the world transmitter?

Mmm.........
"All around the world", but he's only going to be 7,000 km from home.
Living down here in the antipodes, even Singapore is more than 7,000 km away.

Some people's idea of "the world" is a bit parochial.
by TideMan
Wed Jul 29, 2020 9:38 pm
Forum: Python
Topic: Installing the seismological package obspy: SOLVED
Replies: 2
Views: 740

Re: Installing the seismological package obspy

Thanks fruitoftheloom that fixed it.
by TideMan
Tue Jul 28, 2020 11:21 pm
Forum: Python
Topic: Installing the seismological package obspy: SOLVED
Replies: 2
Views: 740

Installing the seismological package obspy: SOLVED

I'm trying to install obspy on my RPi 4B under Buster.
I've tried:

Code: Select all

sudo apt install python3-obspy
pip3 install obspy
conda install obspy

but none of them work for one reason or another.

Does anyone have a suggestion?
by TideMan
Wed Jul 22, 2020 12:02 am
Forum: Troubleshooting
Topic: Pi 4 Over scan settings not working
Replies: 6
Views: 7587

Re: Pi 4 Over scan settings not working

This might also help someone.......... We just upgraded from a 40" Samsung TV to a 55" LG OLED TV. On the Samsung, we could stream from an RPi 4 running Buster with no problems at all. But on the LG OLED, the overscan was so bad, we simply couldn't use it - we couldn't even see the raspber...
by TideMan
Mon Jul 20, 2020 4:44 am
Forum: Troubleshooting
Topic: RDC (xrdp) Problem
Replies: 3
Views: 397

Re: RDC (xrdp) Problem

I switched from xrdp to realVNC for Buster because xrdp didn't work.
by TideMan
Thu Jun 04, 2020 11:38 pm
Forum: Troubleshooting
Topic: SSH using hostname unreliable
Replies: 7
Views: 692

Re: SSH using hostname unreliable

I haven't had your specific problem, but I've had others relating to using the hostname.
These turned out to be Windows playing funny buggers with mDNS.
My present version of Win 10 works OK, but earlier versions did not.
by TideMan
Wed May 20, 2020 9:20 pm
Forum: Networking and servers
Topic: Pi to monitor server online status
Replies: 9
Views: 1415

Re: Pi to monitor server online status

I've just been playing with MSMTP using gmail as the mail server. But I had problems getting gmail to accept my password. It gets its knickers in a twist about an insecure app trying use the account. Then I discovered the concept of "16-character app passwords" here: https://support.google...
by TideMan
Thu May 14, 2020 4:05 am
Forum: Networking and servers
Topic: How can I make PI use wifi connection if ethernet cable is not working
Replies: 3
Views: 390

Re: How can I make PI use wifi connection if ethernet cable is not working

Running Buster on an RPi 4, this happens automatically: If ethernet is connected, that is what is used by default for web traffic for example. If there is no ethernet, wifi is used. But, if ethernet is connected, I can SSH in using either wifi or ethernet (depending on which IP address I use). So, I...
by TideMan
Thu May 07, 2020 8:42 pm
Forum: Troubleshooting
Topic: cant edit files in var/www/html
Replies: 9
Views: 1084

Re: cant edit files in var/www/html

Now to answer your question... sudo pcmanfm ^^^ That opens the file manager as the root user, and any text files opened using it will also be run as root. Be careful! ;) Interesting........... Rather than invoking sudo everytime I want to edit index.html or whatever, I use chmod to change permissio...
by TideMan
Thu May 07, 2020 2:53 am
Forum: General discussion
Topic: raspberry pi 4 model b lost my password
Replies: 2
Views: 653

Re: raspberry pi 4 model b lost my password

Re-image your SD card and start afresh.
And be more careful with your password next time.
by TideMan
Mon Apr 27, 2020 3:25 am
Forum: General discussion
Topic: Font in Terminal
Replies: 4
Views: 758

Re: Font in Terminal

OK, so that's basically what I did. BUT it didn't work in a terminal opened in realVNC. However, it works when I connect using SSH, though there are no colours. Turns out this is controlled by puTTY. And when I try it on a RPi connected to a TV, it works AND I get colours. So......... The terminal y...
by TideMan
Sun Apr 26, 2020 11:42 pm
Forum: General discussion
Topic: Font in Terminal
Replies: 4
Views: 758

Font in Terminal

Is it possible to get a font like Noto Color Emoji in the terminal? I've installed the .ttf file in .fonts and I can get it in the text editor, but not the terminal. In a terminal (with the usual Mono Regular font), using: curl http://wttr.in/christchurch?format=4 I get the current weather condition...
by TideMan
Sat Apr 25, 2020 9:09 pm
Forum: Networking and servers
Topic: Remote SSH into Pi? How to?
Replies: 7
Views: 756

Re: Remote SSH into Pi? How to?

Since it's running headless, VNC unfortunately doesn't work. This statement makes no sense to me. All my RPis (all 7 of them) are running headless with realVNC. You can use remote.it https://remote.it/ to get into your network with both SSH and VNC and they have a special facility for RPis. There a...
by TideMan
Wed Apr 08, 2020 2:19 am
Forum: Off topic discussion
Topic: Downloads page
Replies: 5
Views: 1493

Re: Downloads page

Without the comma, you could interpret it as:
Item 1: NOOBS
Item 2: Raspbian and third party....
With the comma there's no possible confusion.
by TideMan
Mon Apr 06, 2020 9:06 pm
Forum: Beginners
Topic: Network Indicator
Replies: 10
Views: 699

Re: Network Indicator

You sure get a prize for vaguity....... For me, running Buster (and before that Stretch) headless using RealVNC over ethernet, in the top taskbar there is a pair of up and down arrows. Hovering on that gives the ethernet details. If I'm on running wireless, it is a radiating set of circle segments. ...

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