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/r/raspberry_pi
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19. Q: I run my Pi headless and there's a problem with my Pi and the best way to diagnose it or fix it is to plug in a monitor & keyboard, what do I do?
A: Plug in a monitor & keyboard.
20. Q: My Pi seems to be causing interference preventing the WiFi/Bluetooth from working
A. Using [USB 3 cables that are not properly shielded can cause interference](https://www.reddit.com/r/raspberry_pi/comments/gp3jhm/raspberry_pi_4s_usb_30_ports_are_causing/) and the [Pi 4 can also cause interference when HDMI is used at high resolutions](https://www.extremetech.com/computing/302815-raspberry-pi-4-wi-fi-fails-when-using-1440p-video-output).
21. Q: I'm trying to use the built-in composite video output that is available on the Pi 2/3/4 headphone jack, do I need a special cable?
A. [Make sure your cable is wired correctly](https://www.reddit.com/r/raspberry_pi/comments/oo46ih/i_mapped_a_few_trrs_cables_to_the_rca_connectors/) and you are using the correct RCA plug. Composite video cables for mp3 players **will not** work, the common ground goes to the wrong pin. Camcorder cables will often work, but red and yellow will be swapped on the Raspberry Pi.
22. Q: I'm running my Pi with no monitor connected, how can I use VNC?
A: First, do you *really* need a remote GUI? Try using ssh instead. If you're sure you want to access the GUI remotely then ssh in, type `vncserver -depth 24 -geometry 1920x1080` and see what port it prints such as `:1`, `:2`, etc. Now connect your client to that.
23. Q: I want to do something that has been well documented and there are numerous tutorials showing how to do it on Linux. How can I do it on a Raspberry Pi?
A: A Raspberry Pi is a full computer running Linux and doesn't use special stripped down embedded microcontroller versions of standard Linux software. Follow one of the tutorials for doing it on Linux. Also see question #1.
24. Q: I want to do something that has been well documented and there are numerous tutorials showing how to do it with an Arduino. How can I do it on a Raspberry Pi Pico?
A: Follow one of the tutorials for doing it on Arduino, a Pico can be used with the Arduino IDE.
25. Q: How can I power my Raspberry Pi from a battery?
A: All Raspberry Pi models run at 5 V. To choose a battery, first add up the maximum current of your Pi plus everything you attach to it (USB devices, screens, HATs, etc.). Then multiply that current by the number of hours you want it to run to get the required battery capacity in mAh. If you can’t find listed current values, [use a USB power meter](https://www.amazon.com/s?k=usb+power+meter) to measure the actual draw over 12–48 hours. Every battery question comes down to this simple math: the model, brand, or special setup doesn’t change the calculation.

Before posting your question think about if it's really about the Raspberry Pi or not. [If you were using a Raspberry Pi to display recipes, do you really think r/raspberry_pi is the place to ask for cooking help?](https://www.reddit.com/r/raspberry_pi/comments/d11ia1/raspberry_pi_in_kitchen_can_i_substitute/) **There may be better places to ask your question**, such as:

* /r/AskElectronics
* /r/AskProgramming
* /r/HomeNetworking
* /r/LearnPython
* /r/LinuxQuestions
* /r/RetroPie
* [The Official Raspberry Pi Forums](https://www.raspberrypi.org/forums/index.php)

Asking in a forum more specific to your question will likely *get better answers*!

Wondering which flair to use on your post? [See the Flair Guide](https://www.reddit.com/r/raspberry_pi/comments/1hqirky/flair_guide_how_to_choose_the_right_category_for/)

---
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https://redd.it/1pv144i
@r_raspberry_pi
Raspiberry Pi Zero 2, help with getting LCD working

Hey everyone, I'm looking for some help with a project I'm working on, as I'm too far out of my element, and non of my research has produced any working configs, and I've been down far to many rabbit holes with chatgpt trying to figure it out.

I've got a Pi zero 2, running bookworm headless

I purchaed the following screen -
https://www.amazon.com/dp/B08LZG5G19?ref=ppx\_yo2ov\_dt\_b\_fed\_asin\_noscript

Went back the mfg page here -
https://www.waveshare.com/2.8inch-dpi-lcd.htm

Following the install on their wiki - https://www.waveshare.com/wiki/2.8inch\_DPI\_LCD


What I end up having is a yellowish screen, you can faintly see text, and I have black lines bouncing around the screen. I think I can get the rest of the project working myself, however this one has me stuck.

Anyone have any idea what's going on and might be able to help?

Thanks in advance!!!

https://preview.redd.it/pqhlc3sg5m9g1.jpg?width=4590&format=pjpg&auto=webp&s=dffbfbe1e7a803ea4e3154bf599a153d0f855780





https://redd.it/1pwf2xu
@r_raspberry_pi
What cool projects could I do with old raspberry pis?

So while I'm awaiting the arrival of my new Raspberry pi 5 today I plan to use as a Python work computer, I wanted to know what projects I could do with a Raspberry pi zero w 1.1? I got given it by a friend who didn't know what to do with it, and I'm hoping to see what other people have tried with it? I tried to install Raspberry Pi lite os on it, but I've not tried to SSH into it yet. I'm unsure if lite is the right choice of os for such an under-powered device?

I also have an OG Raspberry pi model B (My first computer when I was a kid!) and I'm hoping to go get it from my mum's house and collect a small army of pis to take over the world... erm make a little server rack for a home lab running dockers. I really hope these two old pis aren't dead and they're the little Pis that could!

https://redd.it/1pwshis
@r_raspberry_pi
best way to adapt pi 3 power into usb c?
https://redd.it/1px1rvn
@r_raspberry_pi
Is a raspberry pi a realistic option for me?

I'm a mechanic, I need a PC that takes up very little real estate on my toolbox. Literally all I need to do is stream music, play YouTube videos, and run several chrome tabs simultaneously.

But I want it to look cool, I'm big on aesthetics. The tiny little pi cases with rgb fans are very appealing for these reasons.

I have an overclocked pi 4 that does ok with browsing but it struggles with stuff like streaming videos a bit. I've been out of thr pi game for a few years. Is the pi 5 better? Or should I just build an ITX?

https://redd.it/1px328c
@r_raspberry_pi
How to disable initial configuration screens

I am trying to configure a raspberry pi zero w in gadget mode, so that I can ssh to it from my laptop. However, this is failing, despite me following the instructions scrupulously. After connecting it to a monitor, it appears to be coming up in a mode that requires me to perform an initial configuration via the keyboard/monitor/mouse. Is there any way I can tweak the configuration on the boot SD card so that it goes directly to the 'normal' run state?

https://redd.it/1px5agp
@r_raspberry_pi
I can't get Ethernet to work on my RasPi 4

I've been battling this issue for 2-days now and I'm at my wits end.

So I bought a Raspberry Pi 4b for the purpose of setting up Pi Hole on my local network. I set up a static IP for my ethernet connection, netmask /24, gateway & DNS set to 192.168.1.1 (modem), then I added the RasPi IP to the DHCP Reserved list on the modem. I wanted to have it set up so I can remote into it either via SSH or VNC because the RasPi is basically sitting right next to the modem so I can't plug a monitor in and control it manually. Both SSH & VNC are enabled on the RasPi and I can confirm they work because I was able to remote into my RasPi through WiFi, but I can't do it via ethernet. I pinged it from my PC (Windows 10) and I'm getting "Destination host unreachable". I tried running "arp -a" on my PC and the RasPi ethernet IP is not listed. Only the WiFi is listed among some other unrelated stuff. The left LED for ethernet is (mostly)solid green but the right one is solid orange.

Now, I tried connecting the RasPi using the ethernet cable from my PC and I have internet access but I don't know if SSH would work because I can't test it while my PC is disconnected. I asked ChatGPT and it's suggesting I buy a new cable because the shielding may be interfering. What do you think?

My cable specs:
S/FTP CAT6A STRANDED 26AWG 4P LSOH IEC 60332.3 PATCH ISO/IEC 11801 AND ANSI/TIA-568-C.2 DELTA VERIFIED

Thank you for your time

https://redd.it/1px976g
@r_raspberry_pi
MIDI is unusable after upgrading Pi 500 to Trixie

I recently flashed my SD card cold to Trixie, reinstalling everything on my Raspberry Pi 500, after seeing that Bookworm had that clock problem in the 2030s. However, I noticed now that playing MIDI files don't work in VLC or Kodi, MIDI synth doesn't work at all in Dosbox (using mixer /listmidi shows NO MIDI devices at all), and literally the only place where MIDI of any sort seems to work is in ScummVM (the old Monkey Island games have their MIDI music, presumably from ScummVM's MIDI synthesizer?)

What is going on? I tried installing fluidsynth, and not only did this not fix anything, it actually turned my Pi 500 completely silent (no sound, MIDI or otherwise, worked period). I had to uninstall fluidsynth to get the Pi's sound working again, thankfully, but the MIDI problem remains.

How can I resolve this without making anything worse? Thanks.

https://redd.it/1pxl5dw
@r_raspberry_pi
Cost now for a Raspberry Pi that can function as a print server for a usb printer?

i saw that the pi zero 2 w alone, no case, is $30 on amazon, not sure if there's any cheaper way to get it. am open to alternatives as I have zero investment in the RPI ecosystem. I do have an SD card, ethernet, don't have soldering capability and not really willing to desolder RAM chips but

The print server needs to serve Mac, Windows, Linux, iPhone and iPad. The amount of people using it is small. CUPS will work for the first three, no idea what to do for the last

https://redd.it/1pyeu9b
@r_raspberry_pi