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by tpylkko
Sun Apr 28, 2019 9:24 am
Forum: General discussion
Topic: Will Arduino nano and RPI get Damaged on Supplying 5V 3A DC?
Replies: 29
Views: 803

Re: Will Arduino nano and RPI get Damaged on Supplying 5V 3A DC?

Yes, you have to use a lower CPU frequency for lower voltage and when programming plain AVR chips in Arduino IDE, you can select the frequency from a menu. But I'm not sure if these options are exposed for the nano board
by tpylkko
Sat Apr 27, 2019 7:21 pm
Forum: General discussion
Topic: Will Arduino nano and RPI get Damaged on Supplying 5V 3A DC?
Replies: 29
Views: 803

Re: Will Arduino nano and RPI get Damaged on Supplying 5V 3A DC?

I don't have time to look it up in the data sheet or whatever, but perhaps someone here already has... But as far as a I know all the AVR processors (e.g Atmega328p) (which is what these older Arduino's use) can be run from 3.3.v (and even lower). So, unless there are some other parts on that nano t...
by tpylkko
Thu Apr 25, 2019 7:32 pm
Forum: General discussion
Topic: copying file from /boot
Replies: 3
Views: 139

Re: copying file from /boot

if you install with noobs, you will have many boot partitions, one of noobs and one for each linux distro you install. i am not sure i understand what you are doing the better way to do it is either using scp (cp over ssh) or just copy paste (if it is a small amount of text). that is ssh in, open an...
by tpylkko
Thu Apr 25, 2019 6:23 am
Forum: General discussion
Topic: resolv.conf automatically deleted from etc in raspberry pi 3
Replies: 6
Views: 222

Re: resolv.conf automatically deleted from etc in raspberry pi 3

on most computers, resolv.conf is a dynamically modified file. this means that other network daemons (network manager, resolvconf, netconfig, rdnssd and so on) create that file on the fly and if you manually modify it, they will overwrite your changes eventually. however, you say that this is happen...
by tpylkko
Sun Apr 14, 2019 9:21 pm
Forum: General discussion
Topic: Retired old android smartphone's (HELP PLEASE)
Replies: 11
Views: 560

Re: Retired old android smartphone's (HELP PLEASE)

Reusing a phone doesn't need to include scavenging parts, it is possible to invent uses for them where the entire phone is intact, you just use a part of it or in a new way. For example, they can fairly easily be made into bluetooth "remote controls", audio endpoints that play music in synch from a ...
by tpylkko
Thu Apr 04, 2019 6:44 pm
Forum: General discussion
Topic: Raspberry PI3B+ is unusable as everyday computer "SOLVED"
Replies: 82
Views: 4443

Re: Raspberry Pi is unusable as everyday computer

A faster storage medium will help with loading times. So applications may start quicker and so on. But it will not help a lot with using massive web pages...
by tpylkko
Wed Apr 03, 2019 8:12 am
Forum: General discussion
Topic: Raspberry PI3B+ is unusable as everyday computer "SOLVED"
Replies: 82
Views: 4443

Re: Raspberry Pi is unusable as everyday computer

When you say your wife uses it just for email and listening music, you likely mean that she uses a browser to open up multiple tabs using the gmail web client, some web based music services, or probably youtube. The pi can probably pull this off at times but you can also bring it to situations where...
by tpylkko
Sat Mar 23, 2019 9:13 pm
Forum: General discussion
Topic: WiFi temperature sensor for RPi3?
Replies: 24
Views: 14659

Re: WiFi temperature sensor for RPi3?

You might want to look into LiFePo4 batteries. These run at a around 3.3 V voltage meaning that you can directly run these 3.3 V microcontrollers from them (without the regulators and all)...
by tpylkko
Wed Mar 13, 2019 9:40 pm
Forum: General discussion
Topic: how can i burn an iso to a usb
Replies: 6
Views: 338

Re: how can i burn an iso to a usb

I just recently had to do this, so there are iso images out there that are not hybrid still...
by tpylkko
Thu Feb 07, 2019 11:28 am
Forum: General discussion
Topic: Running program on RPi
Replies: 5
Views: 291

Re: Running program on Raspberry Pi 3

You could use MQTT, for example. A very common way to use remote sensors on things like ESP8266 is this. You install an MQTT broker on the RPi which collects data from sensors which send then over the network. The Rpi then collects that data, stores it and allows people to view and plot it in differ...
by tpylkko
Tue Jan 29, 2019 3:02 pm
Forum: General discussion
Topic: WiFi temperature sensor for RPi3?
Replies: 24
Views: 14659

Re: WiFi temperature sensor for RPi3?

You can do this in many ways. The simplest is to use a ESP or similar microcontroller and analog temp sensor. It would be around $3 total. Digital sensors might be easier to use and more accurate but slightly more expensive. The microcontroller can also do other things, have a local oled display to ...
by tpylkko
Sun Jan 27, 2019 9:00 am
Forum: General discussion
Topic: Run script at login of specific user only
Replies: 19
Views: 805

Re: Run script at login of specific user only

I don't understand what you are doing at all. Is it that your pi is on a cellular network without an ip address (NAT)? Or you are connecting to it and a local network over a mobile connection? What do you mean with 'cloud connection'?You say that you are also employing a VPN. How? Do you want to ope...
by tpylkko
Wed Jan 09, 2019 11:58 pm
Forum: General discussion
Topic: Default swap file size
Replies: 20
Views: 913

Re: Default swap file size

What you say about 4k random read / writes is true. However, most if not all the other solutions offered above incur performance hits or othet compromises also. Besides, when you've already made the decision to use swap, you have already decided to sacrfice some performance. Who knows, maybe some pe...
by tpylkko
Fri Jan 04, 2019 6:45 am
Forum: General discussion
Topic: Default swap file size
Replies: 20
Views: 913

Re: Default swap file size

There are two additional solutions to this problem. You need memory but you don't want to wear out your memory card with swap because they cost money. Solution candidate number 1: use swap but place the swapfile on a USB hard drive to avoid SD wear. Solution candidate number 2: use an extra cheapo m...
by tpylkko
Tue Jan 01, 2019 12:36 am
Forum: General discussion
Topic: Accessing a Pi remotely
Replies: 4
Views: 303

Re: Accessing a Pi remotelyq

There are many ways this can be done...in case I understand your question. Once downloaded you can have kodi show the folder as a network attached device using for example samba or nfs. You could also use dlna or upnp or a web interface to kodi that allows the client to view the content. There are p...
by tpylkko
Fri Dec 07, 2018 5:56 am
Forum: General discussion
Topic: Just about to buy Raspberry Pi for Media Centre and would appreciate help
Replies: 30
Views: 1509

Re: Just about to buy Raspberry Pi for Media Centre and would appreciate help

Here is a few things nobody mentioned. First there are standalone kodi images that you can install like libreelec, which might be handy if you are going to use it only as a media centre mostly. Second, you don't even necessarily need a keyboard or mouse with kodi since you control it with other devi...
by tpylkko
Sun Nov 11, 2018 12:50 pm
Forum: General discussion
Topic: How to run LibreOffice 6.1 on the Raspberry Pi 3
Replies: 3
Views: 1274

Re: How to run LibreOffice 6.1 on the Raspberry Pi 3

Is compiling it difficult? Personally I haven't tried...Or why do you do this? There are also several locations where you can get libreoffice compiled and packaged as a deb. Debian backports offers an arm64 build of Libreoffice 6.1. Does this not run on Raspbian if you have a pi with the 64-bit arm?...
by tpylkko
Sat Sep 01, 2018 10:35 am
Forum: General discussion
Topic: If RPi gets unplugged, sometimes it stalls during boot
Replies: 7
Views: 503

Re: If RPi gets unplugged, sometimes it stalls during boot

The most likely candidate is fsck, like mentioned earlier, because you are doing an unclean unmount when you pull the plug and Raspbian does a fsck on the disks. This takes some time. If you wait a bit longer it might come up. Or you can check for entries in journalctl (but may need to make the logs...
by tpylkko
Thu Apr 26, 2018 9:24 am
Forum: General discussion
Topic: Kivy and touchscreen at startup
Replies: 11
Views: 5650

Re: Kivy and touchscreen at startup

It appears to me that touch will not work with root user or any other user than pi for whatever reason, since "sudo" leads to it not working, a service file lacking "user=pi" also does not work and rc.local does not work (which you should not use anyway - but it is run as root also). Yet another way...
by tpylkko
Thu Apr 26, 2018 8:48 am
Forum: Advanced users
Topic: Web view straight into framebuffer
Replies: 6
Views: 838

Re: Web view straight into framebuffer

no, like free as in the program/package that outputs RAM usage information.
by tpylkko
Tue Apr 24, 2018 8:51 pm
Forum: Advanced users
Topic: how to control gpio & relay in raspberry pi 3 using website
Replies: 6
Views: 1033

Re: how to control gpio & relay in raspberry pi 3 using website

Another option is to set it up on the local network and not on the internet, then use a VPN to connect from outside. But, this will, of course, be more suitable for some use cases than others.
by tpylkko
Mon Apr 23, 2018 7:28 pm
Forum: General discussion
Topic: is calibri & Helvetica font usable?
Replies: 14
Views: 2095

Re: is calibri & Helvetica font usable?

But it is important to realize that there are nearly identical looking free versions for all of these fonts Well I'm no font expert...if the name on the rpi & the "look alike" on the PC have different names, what are they? What I mean, is there a font "conversion chart" between the rpi & PC? I'm no...
by tpylkko
Sun Apr 22, 2018 9:44 pm
Forum: General discussion
Topic: is calibri & Helvetica font usable?
Replies: 14
Views: 2095

Re: is calibri & Helvetica font usable?

FWIW; Debian (and therefore Raspbian, I suspect) has a package called ttf-mscorefonts-installer, which will download and install some closed/proprietary microsoft fonts from microsoft.com on to the operating system. The fonts that ms allows you to use in this way don't have Helvetica or Calibri, how...
by tpylkko
Sun Apr 22, 2018 4:17 pm
Forum: General discussion
Topic: The Raspberry Pi Desktop OS 64 bit
Replies: 69
Views: 21722

Re: The Raspberry Pi Desktop OS 64 bit

Not to be pedantic - or actually why not? - but it is LowRISC. And IIRC they promised to deliver a working chip last year, now it is the middle of this year already and no word, so perhaps don't hold your breath.

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