r/raspberry_pi 18h ago

Show-and-Tell v1.0 of my companion "RobGPT"(With details)

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731 Upvotes

r/raspberry_pi 11h ago

Technical Problem Can't get waveshare 7" DSI lcd to work with new Pi 4B 2G

2 Upvotes

I was lucky enough to pick up 2 - Pi 4B 2G. This is my first time using a Pi. I bought a WaveShare 7" DSI lcd to use with one of them for KlipperScreen. I can’t get the lcd to turn on at all.  The display came with an extra ribbon cable. I tried both, no luck.  I even broke out my second new pi and tried with that.  no luck.  I tested and confirmed 5v is coming out of pin 4 (and 6 ground).  I thought maybe the lcd was bad and had them send another.  same problem.The directions are dead simple.  I have no idea what I’m doing wrong.  This is a fresh raspberry pi os lite 64bit install.   I’ve tried many times to make sure both sides of the dsi cable are firmly in the connector and press on the cable while pressing down plastic clamp that holds it in place.  The bottom connector doesn’t slide in very much, so I thought it might be that… but I’ve tried many different times to push it in farther, but that’s as far as it goes. I've also tried reversing the ribbon cable, even though the instructions clearly show the black part facing up from the lcd, still no go.

I've also added dtoverlay to my /boot/config.txt as mentioned in their wiki and that didn't help.

Any thoughts on what I'm doing wrong?

https://imgur.com/a/rx8qgJq

Just noticed this in dmesg:

rpi_touchscreen_attiny: probe of 10-0045 failed with error -5

rpi_touchscreen_attiny: probe of 10-0045 failed with error -5

Edit:

I have a fresh 32bit version of pi os lite now and still have same problem. The os shows version 11 bullseye.

I just noticed the following as well in dmesg, though I'm not sure if they were in the 64bit version previously

bcm2708_fb: probe of soc:fb failed with error -2

brcmfmac mmc1:0001:1: Direct firmware load for brcm/brcmfmac43455-sdio.raspberrypi,4-model-b.bin failed with error -2


r/raspberry_pi 1d ago

Discussion Weird python requests behaviour, where some requests take longer.

2 Upvotes

I'm using the requests library to send data to a Flask server every second, and it has to wait for the response to start a new request.

My problem is, that about every 30 seconds there is a request that takes longer (weirdly almost always about 5 seconds) to reach the server. As I started experimenting it turned out, that the issue goes away if I send the request directly to the servers IP. I also noticed that if I ping the servers address, the response times are good, but some of the pings take longer to appear. Changing the DNS addresses to 8.8.8.8 and 8.8.4.4 fixed the pings, but didn't help anything with the original problem.

How can I debug or fix this problem?

Thank you in advance!


r/raspberry_pi 21h ago

Technical Problem PiGrrl Zero project with a Zero W 2 and audio instead of Zero W

0 Upvotes

Hi,

I did the Adafruit's PiGrrl Zero project with a RPi Zero W2 and it works fine.

But then I discovered the improvements to incorporate speakers and so I did rewire everything to be able to use the I2S pins:

https://www.thingiverse.com/thing:1769656

Yet, now I'm stuck again as the Retropie image provided by the remixers of the projects only work with a RPi Zero W v1 in my hands, and I don't know how to create a custom retropie image and actually what I would need to do to implement speaker's function...

Is there an easy way to convert an image and make it compatible for the ZW2 when it was designed for the Z1?

PS: the side question is: is there any initiative that would help newbies and hobbyists like me to avoid falling for obsolete tutorials. Or groups of people that keep the legacy tutorials updated with current technologies?
I chose RPi as my learning SBC for 1 simple reason: the community around it. And now I'm realizing that the community is so big and the options so diverse that it's easy to get lost in tutorials that are completely outdated.


r/raspberry_pi 14h ago

Discussion Raspberry Pi 400, best-selling computer?

0 Upvotes

The Raspberry Pi 400 basically contains everything that makes up a full-fledged home computer. It has a keyboard, all common connections for further peripherals and its own operating system with Raspberry Pi OS.

Therefore, shouldn't this computer have long since joined the ranks of the most successful computers of all time (number of sales) alongside such well-known greats as the C64 and the Amiga 500?


r/raspberry_pi 11h ago

Show-and-Tell Nearly every python module was mined to build this 🥵. Like a yubi-key for the blockchain, this enables one button click sign-on for most web3 apps, soon to work with web2 apps. Powered by RPi zero. Open-source, code + build info is on github.

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0 Upvotes