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by rpdom
Mon Sep 24, 2018 5:34 pm
Forum: General discussion
Topic: Screen Application
Replies: 2
Views: 73

Re: Screen Application

bash is the command shell. It provides the cli environment for you so you can type commands and have them executed. When you are at a command line prompt you are (usually) running in bash. Try 'man bash'
by rpdom
Mon Sep 24, 2018 6:27 am
Forum: Raspbian
Topic: My Pi 3 hacked
Replies: 9
Views: 347

Re: My Pi 3 hacked

My question is how can I get it back as I do not have physical access to it , however, I can connect to it from local network via TeamViewer. How do you not have access to a computer on your local network? Local network does not always mean physically local. TeamViewer is remote VPN type access.
by rpdom
Mon Sep 24, 2018 6:16 am
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Raspian alternative to run on Windows laptop
Replies: 7
Views: 162

Re: Raspian alternative to run on Windows laptop

I'd install Debian, which is what Raspbian is based on. The default desktop and themes will be different, but you could later add the Raspberry Pi for PC repositories and change the desktop. That will give you dual boot with other operating systems.
by rpdom
Mon Sep 24, 2018 6:01 am
Forum: General discussion
Topic: E ink as Monitor for raspbian Lite
Replies: 8
Views: 652

Re: E ink as Monitor for raspbian Lite

Imperf3kt wrote:
Mon Sep 24, 2018 1:07 am
In my opinion, 5Hz is not an acceptable refresh rate for typing.
5Hz means whatever you type now, won't show on the monitor for 12 seconds.
5Hz would be five refreshes per second. I think you are assuming 5Hz means five per minute, which is incorrect.
by rpdom
Mon Sep 24, 2018 5:41 am
Forum: Other projects
Topic: Pi Powered Doorbell
Replies: 3
Views: 91

Re: Pi Powered Doorbell

It is possible. I have had a Pi powered doorbell for a few years now. I removed the old doorbell completely, just leaving the button switch. To prevent electrical interference triggering the bell sound (because the wires back to the Pi were going to be quite long - over 3 metres/10 feet), I wired th...
by rpdom
Sun Sep 23, 2018 9:04 pm
Forum: Automation, sensing and robotics
Topic: Pi Based Heating* Control system
Replies: 11
Views: 6741

Re: Pi Based Heating* Control system

DougieLawson wrote:
Sun Sep 23, 2018 8:34 pm
[Are you joking? That pile of junk hasn't been updated since 2015. There are much better ways to control GPIOs now (usually using RPi.GPIO, GPIOZero and/or PIGPIO/pigpiod).
Check the date of that response. 2014!

Also, Toshibass hasn't visited the forums since 27 Feb 2017.
by rpdom
Sun Sep 23, 2018 6:49 pm
Forum: Automation, sensing and robotics
Topic: Pi Based Heating* Control system
Replies: 11
Views: 6741

Re: Pi Based Heating* Control system

thedaytyler wrote:
Sun Sep 23, 2018 9:07 am
I would really appreciate any feedback.
It would probably be best to start a new topic, rather than adding to an old one. Also, add some more details about how the zones would be controlled.
by rpdom
Sun Sep 23, 2018 10:01 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Connect two 8ohm 1 w speakers to RP3B+
Replies: 5
Views: 139

Re: Connect two 8ohm 1 w speakers to RP3B+

someone advised me not to use PAM8403 with RPi, did you use it ? I can't think why, unless you were driving speakers with the negative connections joined together which won't work with a PAM8403. The left and right outputs must be entirely separate. I've been using a PAM8403 on an old Pi (1)B+ for ...
by rpdom
Sun Sep 23, 2018 6:09 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Connect two 8ohm 1 w speakers to RP3B+
Replies: 5
Views: 139

Re: Connect two 8ohm 1 w speakers to RP3B+

No, you would need a small amplifier at least. 8 Ohm is too low impedance for the audio circuits on the Pi to drive.

You could use something like a cheap PAM8403 amplifier module to driver the speakers. Those just need a smooth power supply of around 5V.
by rpdom
Sat Sep 22, 2018 6:37 pm
Forum: Add-ons
Topic: The 5V GPIO Power Question
Replies: 11
Views: 308

Re: The 5V GPIO Power Question

I was under the impression that, to fit the extra ARM cores on the chip, they removed the power supply bits. Looking at the Compute Module schematics, 5v doesn't appear to reach the module, so the chip can't require it. I think you are right. There used to be internal voltage regulators on the BCM2...
by rpdom
Sat Sep 22, 2018 6:24 pm
Forum: General programming discussion
Topic: GPIO programming
Replies: 1
Views: 74

Re: GPIO programming

I think pigpio has a method for writing certain GPIOs in bulk. You could write your own driver. The gpios outputs are controlled by 32-bit words. There are two for each set of 32 gpios. Writing 1 to any bit on one of them will set the corresponding gpio high, writing 1 to bits in the other word set ...
by rpdom
Sat Sep 22, 2018 7:57 am
Forum: Troubleshooting
Topic: Raspberry Pi's wont boot
Replies: 2
Views: 64

Re: Raspberry Pi's wont boot

Ernst is correct. Also, you don't need this command. By dd'ing the image onto the card you will overwriting any existing formattin on the card. sudo mkfs.vfat -F32 -v /dev/mmcblk0p1 Also, more importantly, this line is wrong: sudo dd bs=4M if=2018-06-27-rpd-x86-stretch.iso of=/dev/mmcblk0p1 status=p...
by rpdom
Sat Sep 22, 2018 7:37 am
Forum: Troubleshooting
Topic: NFS Server stopped working
Replies: 20
Views: 354

Re: NFS Server stopped working

Is the rpc service running? I remember having problems with that one at some point. The rpc daemon was trying to start before the network was accessible and I had to do something to get it starting up correctly. I'm fairly certain that issue has been fixed now. Maybe it isn't installed? It seems unl...
by rpdom
Sat Sep 22, 2018 4:27 am
Forum: Troubleshooting
Topic: NFS Server stopped working
Replies: 20
Views: 354

Re: NFS Server stopped working

Sep 21 20:26:43 ArchivePi exportfs[7323]: exportfs: Failed to stat /mnt/nfs: No
That's your problem. Presumably you have /mnt/nfs in your list of exports, but /mnt/nfs doesn't exist (yet).
by rpdom
Fri Sep 21, 2018 8:46 pm
Forum: Troubleshooting
Topic: NFS Server stopped working
Replies: 20
Views: 354

Re: NFS Server stopped working

Rasilon wrote:
Fri Sep 21, 2018 8:32 pm
See "systemctl status nfs-server.service" and "journalctl -xe" for details.
Type those two commands into a terminal window on your Pi (you may need to put "sudo " in front of each command).
by rpdom
Fri Sep 21, 2018 4:41 am
Forum: Beginners
Topic: GPIO Pin Audio Speaker, how?
Replies: 13
Views: 748

Re: GPIO Pin Audio Speaker, how?

connect the '-' from the speaker to the ground pin. connect the '+' to one of GPIO pins. Use PWM library to generate a tone/frequency. That would work if the speaker were a high-impedence piezo, but this seems to be a small but traditional coil-speaker, 3W 4R, which would be too much of a load on a...
by rpdom
Thu Sep 20, 2018 8:09 pm
Forum: Advanced users
Topic: info about firmware (rootkit ?)
Replies: 1
Views: 109

Re: info about firmware (rootkit ?)

Yes, all the bootcode / firmware is on the SD card or USB device - apart from a small boot ROM in the GPU which is hard coded into the silicon and can't be changed.
by rpdom
Thu Sep 20, 2018 6:26 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: how to use the GPIOs
Replies: 18
Views: 494

Re: Hardware

What is unknown territory to me is how to bridge the low voltage DC world with the AC world and find out how to safely connect raspberry GPIO to standard mains for e.g. domotics, hence my question. This is the bit that can be very dangerous if you get it wrong. Hence people advising against doing i...
by rpdom
Tue Sep 18, 2018 6:06 pm
Forum: Other programming languages
Topic: A compilable basic that uses line numbers for Pi?
Replies: 16
Views: 408

Re: A compilable basic that uses line numbers for Pi?

Simple ways of accessing the gpios that should work from almost any language: a) If the BASIC has a way of running system commands, you could use WiringPi's gpio command. b) Pretty much any BASIC should be able to read and write files, so use the sysfs gpio interface for straightforward gpio functio...
by rpdom
Tue Sep 18, 2018 5:06 am
Forum: Other projects
Topic: Dot matrix paper feeder ideas
Replies: 11
Views: 211

Re: Dot matrix paper feeder ideas

Could you look around for the sheet feeder option for that printer. I think it will take up to 50 sheets at a time.
by rpdom
Mon Sep 17, 2018 8:06 pm
Forum: Compute Module
Topic: How to get a 2nd Camera Adapter Board?
Replies: 29
Views: 5718

Re: How to get a 2nd Camera Adapter Board?

I believe the Pi Zero uses the same camera connector as the CMIO board, so a cable for the zero should do the trick.
by rpdom
Sun Sep 16, 2018 6:18 pm
Forum: General discussion
Topic: POE Hat Quarantine (Orders Blocked due to Hardware Issue)
Replies: 10
Views: 336

Re: POE Hat Quarantine (Orders Blocked due to Hardware Issue)

- Blocks all GPIO pins and therefore hat stacking You can use a header with long pins to allow stacking a HAT on top of the PoE HAT (this is the only HAT that allows stacking at the moment). It does mean using longer spacers to mount the PoE HAT on the Pi. It would be nice if the header and spacers...
by rpdom
Sun Sep 16, 2018 1:26 pm
Forum: Beginners
Topic: Power for multiple PI's
Replies: 9
Views: 883

Re: Power for multiple PI's

I use an Anker 6 port 60w USB charger. Typically three or four pis running off it, with assorted HATS or doohickeys on a breadboard sucking power as well. Which Pi's do you run off this? Will it work fine with the Raspbery Pi 3+ Model B? Seeing as you are replying to a post that was made about two ...
by rpdom
Sun Sep 16, 2018 12:59 pm
Forum: Troubleshooting
Topic: Pi3 won't recover from reboot
Replies: 14
Views: 373

Re: Pi3 won't recover from reboot

try using the shutdown command? a 'shutdown -h' will stop the system and it will not restart until powered down and powered back up or reset is pulled to ground. a 'shutdown -r' will restart the system.. sudo shutdown -r now is the instant restart command i use, The "reboot" command is the equivale...
by rpdom
Sun Sep 16, 2018 6:40 am
Forum: Beginners
Topic: Need an easy NAS setup for a 3 B+
Replies: 9
Views: 272

Re: Need an easy NAS setup for a 3 B+

Also, I am interested in using NTFS, and maybe booting from the hard disk. If you are making a NAS with a Raspberry Pi and Raspbian, you'll want to stick to an ext4 filesystem - unless you plan to disconnect the disk and plug it directly into a Windows or Mac system sometimes. etx4 will deliver the...

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