Graphics, sound and multimedia • 2024 Audio Injector OCTO status ?
I ordered two of these from the link listed on the site and I cannot get either of them to do anything but put out weird noises on all 8 channels.RPi4 4gbIs there a magic combination of kernel version...
View ArticleTroubleshooting • After the 'Welcome to Raspberry Pi' Screen - blank display
I finally acquired a Pi5 and used an image from my Pi4 (originally Raspberry Pi reference 2023-10-10 - fully updated) with changes to hostname etc.I normally run headless and use VNC if I want a...
View ArticleC/C++ • Pico SDK compilation question re placement of preprocessor directives
I'm working on the example program 'i2c/bus_scan/bus_scan.c' in the Pico SDK, and there's something I don't understand: This section of code is included in 'main () { }' : Code: #if...
View ArticleRaspberry Pi OS • Wayland window size and position
I'm an experienced Raspberry Pi user, but new to the Raspberry Pi 5 and Wayland.On the Wayland desktop, all windows open at the same position and with the same size. This is quite confusing because...
View ArticleRaspberry Pi OS • ZlibInStream error with Wayvnc
I'm using a headless Raspberry Pi 5 with Wayvnc, with Realvnc client on the Mac. I'm aware of some issues with Wayvnc, but most of the time it seems to work very well.But sometimes I get the following...
View ArticleAdvanced users • Act LED on rpi 5 with Pineberry bottom NVME drive
I have an RPI 5 with the Pineberry Pi bottom-mounted NVME drive, which uses the PCI bus connection. I would like to make an external LED blink with activity on the drive. Does anyone have an idea of...
View ArticleAdvanced users • External LEDs on Pi 5
I am trying to connect external LEDs to my Pi 5. For example, I have put dtparam_act_led_gpio=23 and dtparam=act_led_trigger=heartbeat in my /boot/firmware/config.txt. I have connected a LED with an...
View ArticleTroubleshooting • Raspberrypi 5 not booting directly when powered over GPiO
When powering my RPI5 with the a standard power supply over USB-C it boots directly, but when I power it over 5V GPIO, the only visible reaction is the red LED turning on and staying on (no boot)....
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Troubleshooting • I2C Sensor returning obviously incorrect readings.
Hello all,I have this air quality sensor (https://github.com/DFRobot/DFRobot_AirQ ... ree/master) which i am using with a raspberry pi zero via I2C. For context this has worked in the past until it...
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Camera board • HQ-Camera Strange disturbances in the picture
I am using an HQ camera with a zoom lens. Zoom because I need a focal length of approx. 20mm.I notice disturbances in the corners of the picture.What could be the reason for this?Statistics: Posted by...
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Troubleshooting • [Help!] Accurate signal frequency control at C++
I drive a stepper motor by writing code in C++ on a Raspberry Pi to generate pulses. However, when I run the code to drive the motor, I observe that the generated pulses are causing intermittent data...
View ArticleTroubleshooting • V1 camera not recognized on a Pi5 with modified kernel
Hi,I have a Pi5 with a TBS DVB tuner connected. To make the tuner work kernel must be modified according to these instructions:Code: git clone https://github.com/tbsdtv/media_build.gitgit clone...
View ArticleTroubleshooting • Mouse and keyboard not working on Pi5
My Pi5 boots up seemingly fine, and gets to the screen where you have to click next. But neither my mouse nor keyboard works. And I've tried lots, new and old. Tried with a Pi4 power supply, and a...
View ArticleTroubleshooting • No internet while wifi is working
No internet while wifi is workingRaspberry PI 3 Model B V1.2OS: Raspbian GNU/Linux; VERSION="9 (stretch)" I can’t say anything about ethernet, since the cat chewed through the cable, but with wifi...
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General discussion • INNOLUX AT070TN94 7inch display with raspberrypi 3b+ ::...
Hi everyone,I am using INNOLUX AT070TN94 7inch DPI display with raspberrypi 3b+. After setting its config.txt file, I am getting something like attached image on it's display.config.txt file setting...
View ArticleAdvanced users • LTE, OpenVPN, IP Camera, port forwarding?
Hi there,I have Raspberry Pi 4 with a LTE modem and a IP camera connected to the ethernet port (without a switch or router). I want to be able to see the camera stream from the internet. I have the...
View ArticleGraphics, sound and multimedia • Trouble with ALSA on Pi5/PiOS5
I have some long-standing code that uses the ALSA PCM API to produce sound effects.I've just built this code on a Pi5 with PiOS5 for the first time and it doesn't work....Well....It does produce the...
View ArticleGeneral • Determinism of GPIO output/input timings ?
Hello, I'm wondering about the possibility of using the rp2040 PIOs for cycle-accurate delayed triggering relative to a PIO-bit-banged protocol.Here's the considered setup:- PIO0 bit bangs a protocol...
View ArticlePython • Strange behavior of time
I try to manipulate the time and get these errors on raspberry pi.Running these on my mac in python no problems.What is wrong?Code: current_time = time.localtime() ^^^^^^^^^^^^^^AttributeError: 'Time'...
View ArticleTroubleshooting • Raspberry Pi Zero W 1.8inch spi lcd screen
how to connect a 1.8inch lcd screen to raspberry pi zero w and show the screen on it（not just control by python to draw shapes）ioport of the lcd：3.3vGndMisoMostSuckLCD csRam csDcRstBLStatistics:...
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