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by The Traveler
Wed Jul 25, 2018 12:50 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: 2.8" Screen questions
Replies: 1
Views: 267

Re: 2.8" Screen questions

1. Does it use all the pins or can I remove some? And if I don't want the touch function, what pins can remove from that?
Don't. Just. Don't.

The rest of what you want to know is in the stuff you posted. Play around with the configuration file to you heart's content.
by The Traveler
Tue Jul 24, 2018 10:14 pm
Forum: Off topic discussion
Topic: 2.2 inch LCD panels for pico projector
Replies: 7
Views: 1890

Re: 2.2 inch LCD panels for pico projector

I appreciate the time you're taking to respond, but I'm not asking for advice. I'm happy to try and help, but advice is all I can give you. I'm asking; does such a panel exist? if so, do you know where I can find it? 1.Perhaps. You want an answer without providing critical information. While it may...
by The Traveler
Tue Jul 24, 2018 9:07 pm
Forum: Off topic discussion
Topic: 2.2 inch LCD panels for pico projector
Replies: 7
Views: 1890

Re: 2.2 inch LCD panels for pico projector

I'm not entirely sure what you are getting at... Well, two things. Just having a bit of sport with you. After all, you're looking for hardware advice for a device that has nothing to do with a RPi in the first place in the RPi forums. I'm looking to replace one loose component, and if it won't outp...
by The Traveler
Tue Jul 24, 2018 6:05 pm
Forum: Graphics programming
Topic: GUI developement for rpi3 board
Replies: 10
Views: 4599

Re: GUI developement for rpi3 board

thanks but when i saw tkinter the GUIs look doesnot good so i was thinking about PyQt, is it better option????
... the project deadline is reaching near.
I think you should decide what is more important, your deadline or "good looks" and make your choice. The clock is ticking ...
by The Traveler
Tue Jul 24, 2018 2:26 pm
Forum: Networking and servers
Topic: PI3B+ Web server cluster
Replies: 7
Views: 2320

Re: PI3B+ Web server cluster

[EDIT] I cut some dialog after determining it wasn't really helpful to the OP. learning about distributed computer systems as well will be handy for my career. I guess is depends on what your career goals are. There are better projects than web server clustering if you want to understand distributed...
by The Traveler
Tue Jul 24, 2018 12:33 pm
Forum: C/C++
Topic: Using the Adafruit RGB matrix with the unused GPIO pins
Replies: 5
Views: 782

Re: Using the Adafruit RGB matrix with the unused GPIO pins

Is there any other way to get gpio-like inputs and outputs with the Pi without using the gpio pins? What comes to mind is to use an Arduino Micro or Nano (or some other board) via the USB port and bypass GPIO altogether. The Arduino can use i2c or spi from the RPi if the hat library doesn't interfe...
by The Traveler
Tue Jul 24, 2018 3:33 am
Forum: Beginners
Topic: Beginner Asking Advice using the raspberry pi and phpmyadmin
Replies: 9
Views: 610

Re: Beginner Asking Advice

Arduino is a microcontroller. It doesn't have the facilities to host a database system, or web server and it's scripting framework. It's used mostly for reading sensor data and controlling devices like motors, relays, solenoids, etc. Normally what would be termed "embedded applications". The RPi is ...
by The Traveler
Tue Jul 24, 2018 2:48 am
Forum: C/C++
Topic: Using the Adafruit RGB matrix with the unused GPIO pins
Replies: 5
Views: 782

Re: Using the Adafruit RGB matrix with the unused GPIO pins

When combined with the HAT libraries, I have no luck accessing the pins. The developer of the libraries won't answer any emails, and Adafruit won't answer me as well. That's unfortunate and weird. Why would those uncommitted pins be locked out? <Scratches head> Just curious, but are there foil trac...
by The Traveler
Tue Jul 24, 2018 1:47 am
Forum: C/C++
Topic: Using the Adafruit RGB matrix with the unused GPIO pins
Replies: 5
Views: 782

Re: Using the Adafruit RGB matrix with the unused GPIO pins

Hmm, it uses a lot of pins, 15 of them plus 1 each of both power pins: https://pinout.xyz/pinout/adafruit_rgb_matrix_hat_rtc# which leaves BCM 18, 24 and 25 available. Can you access any of those 3?
by The Traveler
Tue Jul 24, 2018 12:09 am
Forum: Beginners
Topic: How do I alter files using commands?
Replies: 12
Views: 754

Re: How do I alter files using commands?

Couple of ways to do it: https://www.linuxquestions.org/questions/programming-9/shell-script-file-manipulation-377340/ Basic shell scripting: https://en.wikibooks.org/wiki/Bash_Shell_Scripting and how to "glue" together linux command line programs to form larger, more complex applications. It's real...
by The Traveler
Mon Jul 23, 2018 11:08 pm
Forum: Beginners
Topic: Connecting a display via GPIO
Replies: 9
Views: 530

Re: Connecting a display via GPIO

Looks like a good place to start: https://learn.adafruit.com/adafruit-min ... t/overview

Adapt as necessary.
by The Traveler
Mon Jul 23, 2018 9:40 pm
Forum: Off topic discussion
Topic: 2.2 inch LCD panels for pico projector
Replies: 7
Views: 1890

Re: 2.2 inch LCD panels for pico projector

I was curious if it would be possible to swap this out for a panel with a higher resolution? Sure. Just take it all apart, analyze the circuitry and solid state components and have a go at it (that's the "fiddle with" part). Not saying it would work, but you'd have learned something ... That's pret...
by The Traveler
Mon Jul 23, 2018 9:02 pm
Forum: Beginners
Topic: iBall procam webcam with pi
Replies: 1
Views: 125

Re: iBall procam webcam with pi

Searching the 'net a bit, I didn't find any specific linux ARM-based drivers. That doesn't mean you absolutely can't use it. You might look around and see if any of the generic linux ARM drivers might work. If the source code is there, you could hack at it. https://www.tldp.org/HOWTO/Webcam-HOWTO/ha...
by The Traveler
Mon Jul 23, 2018 8:12 pm
Forum: Raspbian
Topic: Audio Visualisation Raspbian Lite
Replies: 1
Views: 204

Re: Audio Visualisation Raspbian Lite

But you may/will have to do some hacking for ARM. https://github.com/dpayne/cli-visualizer
by The Traveler
Mon Jul 23, 2018 6:21 pm
Forum: Advanced users
Topic: Is a read-only filesystem safe?
Replies: 2
Views: 333

Re: Is a read-only filesystem safe?

Does this mean you can shut the power off anytime without corrupting the memory card? Nope. Read only doesn't mean you can't corrupt it. Any volatile storage medium can usually be corrupted in some way. SD are volatile media. You might want to query other Lakka users on that forum for their input h...
by The Traveler
Mon Jul 23, 2018 5:20 pm
Forum: Raspbian
Topic: RPi 3 B+ ignoring DHCP MTU setting
Replies: 5
Views: 1669

Re: RPi 3 B+ ignoring DHCP MTU setting

It appears that changing the MTU value requires "sudo ifconfig eth0 mtu <value> to change it. I haven't found any information about accepting and changing it from dhcp other than this: https://01.org/connman You might check it out and see if it leads to a solution for you. Just as an aside, I'm curi...
by The Traveler
Mon Jul 23, 2018 3:29 pm
Forum: General discussion
Topic: Y splitter for power pins?
Replies: 3
Views: 496

Re: Y splitter for power pins?

This might sound like a "shooting flies with a bazooka" solution, but in the long run, I find it worthwhile. I use a half size breadboard with external power supply for larger projects. It's set up like a power strip and only supplies power, no circuit components are mounted to it. One side is 5vdc ...
by The Traveler
Mon Jul 23, 2018 2:35 pm
Forum: General discussion
Topic: A new level of seasickness - Or how I learnt to stop worrying and love the new website
Replies: 66
Views: 5508

Re: A new level of seasickness - Or how I learnt to stop worrying and love the new website

While is a bit OT, I'm tossing this in for those who may be looking for a good way to produce their own website or webpages for their RPi project. I'm a huge fan of using Responsive Web Design because one can do a lot with just HTML and CSS. I don't really care for javascripting much, but with judic...
by The Traveler
Mon Jul 23, 2018 12:32 pm
Forum: General discussion
Topic: Can SenseHAT and touchscreen be used together?
Replies: 6
Views: 914

Re: Can SenseHAT and touchscreen be used together?

As the SenseHAT appears to use all 40 GPIO pins, Actually, the sensor hat only uses a hand full of pins on the RPi header: https://pinout.xyz/pinout/sense_hat# but the sensor board header covers all of them as you've seen. It's possible to access the remaining pins by using a stacking header with e...
by The Traveler
Mon Jul 23, 2018 1:52 am
Forum: Troubleshooting
Topic: Need good reference for the many logs in Raspbian
Replies: 9
Views: 484

Re: Need good reference for the many logs in Raspbian

General overview: https://www.lifewire.com/introduction-to-linux-log-files-2192233 and http://www.lostsaloon.com/technology/understanding-log-files-in-linux-where-to-look-when-things-go-wrong/ I find the system and messages logs are generally the most useful. system especially as it contains most of...
by The Traveler
Sun Jul 22, 2018 10:29 pm
Forum: Beginners
Topic: Simple UDP Server for IoT
Replies: 6
Views: 371

Re: Simple UDP Server for IoT

Well, the code link you posted is as good a starting point as any. There isn't much else out there for kernel space UDP. Hack away and have fun! You might find this of some interest: https://developers.redhat.com/blog/2017/06/09/the-need-for-speed-and-the-kernel-datapath-recent-improvements-in-udp-p...
by The Traveler
Sun Jul 22, 2018 10:06 pm
Forum: Beginners
Topic: Simple UDP Server for IoT
Replies: 6
Views: 371

Re: Simple UDP Server for IoT

The program that I write is very critical to time and speed. "Critical". Ok, well and good. Why UDP though? If it's really critical, UDP isn't the transport layer protocol recommended for critical applications. The potential for dropping packets without data recovery exists presents a real dependab...
by The Traveler
Sun Jul 22, 2018 7:18 pm
Forum: Networking and servers
Topic: How can I broadcast OSC messages to multiple RasPi's on my network?
Replies: 2
Views: 1058

Re: How can I broadcast OSC messages to multiple RasPi's on my network?

It has an option to send OSC packets over UDP. OSC is "layered" over TCP/UDP. The underlying transmission protocol doesn't care what data is it carries or how it's formatted. The biggest issue with UDP is this, if you drop packets on a network, their gone. Any information they carry is gone with th...
by The Traveler
Sun Jul 22, 2018 5:40 pm
Forum: General programming discussion
Topic: How to create a professional GUI on Raspberry
Replies: 4
Views: 1509

Re: How to create a professional GUI on Raspberry

I'd suggest you write your image processing application first and do some performance bench marking then worry about a GUI. Image processing is notorious for eating processor cycles. The most "professional looking GUI" you can make won't matter if your application runs like a snail. Your putting the...
by The Traveler
Sun Jul 22, 2018 3:59 pm
Forum: Gaming
Topic: SNES sound laging
Replies: 1
Views: 395

Re: SNES sound laging

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